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• How to get httrack to work with SSL on mac os x? (libssl.so not found)

  - by cwd

  I'm trying to use httrack website copier but the program is running and reporting "no-ssl" (ie: it does not have the capability to copy secure sites). From looking over this thread, it seems that the problem is either when I make & configure the program, or when I run the program, it is not finding the lib-ssl / open-ssl that I have installed. I think it is looking for /var/root/lib/libssl.so.1.0 The user on that forum states that he created a symlink which allowed httrack to find the ssl library in the non-default location. Perhaps that's what I need to do - but where do I create the link from and to? I'm not seeing that I have any libssl.so files installed on my system. Do I need the development package? If so, how do I install that? I used macports to install the current version of openssl that I have. I'm running OS X 10.6. Reserch I have run this command to try and debug: dtruss httrack 2&1 | grep ssl and that outputs this: stat64("libssl.so.1.0\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.1.0\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.1.0\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.1.0\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.1\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.1\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.1\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.1\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.1.0.0\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.1.0.0\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.1.0.0\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.1.0.0\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8p\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8p\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8p\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8p\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8o\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8o\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8o\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8o\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8n\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8n\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8n\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8n\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8m\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8m\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8m\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8m\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8l\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8l\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8l\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8l\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8k\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8k\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8k\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8k\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8j\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8j\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8j\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8j\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8g\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8g\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8g\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8g\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8b\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8b\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8b\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8b\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.8\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.8\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.8\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.8\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.7\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.7\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.7\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.7\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so.0.9.6\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so.0.9.6\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so.0.9.6\0", 0x7FFF5FBFF210, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so.0.9.6\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("libssl.so\0", 0x7FFF5FBFEE30, 0x7FFF5FBFF470) = -1 Err#2 stat64("/var/root/lib/libssl.so\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/local/lib/libssl.so\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 stat64("/usr/lib/libssl.so\0", 0x7FFF5FBFF220, 0x7FFF5FBFF470) = -1 Err#2 I have already used mac ports to install open-ssl: port installed The following ports are currently installed: beecrypt @4.2.1_2 (active) cpio @2.10_0 (active) expat @2.0.1_1 (active) flex @2.5.35_0 (active) gettext @0.18.1.1_2 (active) gperf @3.0.4_0 (active) icu @4.6_0 (active) libiconv @1.13.1_0 (active) mysql5 @5.1.53_0 (active) ncurses @5.9_0 (active) ncursesw @5.8_0 (active) neon @0.29.5_0 (active) openssl @1.0.0c_0 (active) perl5.8 @5.8.9_3 (active) popt @1.16_0 (active) python24 @2.4.6_7 (active) readline @6.1.002_0 (active) rpm @4.4.9_10 (active) sqlite3 @3.7.3_0 (active) zlib @1.2.5_0 (active) Here are the install locations: locate libssl /opt/local/lib/libssl.1.0.0.dylib /opt/local/lib/libssl.a /opt/local/lib/libssl.dylib /opt/local/lib/pkgconfig/libssl.pc /opt/local/var/macports/software/openssl/1.0.0c_0/opt/local/lib/libssl.1.0.0.dylib /opt/local/var/macports/software/openssl/1.0.0c_0/opt/local/lib/libssl.a /opt/local/var/macports/software/openssl/1.0.0c_0/opt/local/lib/libssl.dylib /opt/local/var/macports/software/openssl/1.0.0c_0/opt/local/lib/pkgconfig/libssl.pc /usr/lib/libssl.0.9.7.dylib /usr/lib/libssl.0.9.8.dylib /usr/lib/libssl.0.9.dylib /usr/lib/libssl.dylib /usr/lib/pkgconfig/libssl.pc What should I do next? More Info I tried the solution below: $ DYLD_INSERT_LIBRARIES="/opt/local/lib/libssl.1.0.0.dylib" httrack Welcome to HTTrack Website Copier (Offline Browser) 3.44-1-nossl Copyright (C) Xavier Roche and other contributors To see the option list, enter a blank line or try httrack --help It is still not able to load the ssl lib: 3.44-1-nossl

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• Reverse lookup SERVFAIL

  - by Quan Tran

  I just set up a DNS server and a web server using Virtualbox. The IP address of the DNS server is 192.168.56.101 and the web server 192.168.56.102. Here are my configuration files for the DNS server: named.conf: // // named.conf // // Provided by Red Hat bind package to configure the ISC BIND named(8) DNS // server as a caching only nameserver (as a localhost DNS resolver only). // // See /usr/share/doc/bind*/sample/ for example named configuration files. // options { directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; //query-source address * port 53; //forward first; forwarders { 8.8.8.8; 8.8.4.4; }; listen-on port 53 { 127.0.0.1; 192.168.56.0/24; }; allow-query { localhost; 192.168.56.0/24; }; recursion yes; dnssec-enable yes; dnssec-validation yes; dnssec-lookaside auto; /* Path to ISC DLV key */ bindkeys-file "/etc/named.iscdlv.key"; managed-keys-directory "/var/named/dynamic"; }; logging { channel default_debug { file "data/named.run"; severity debug 10; print-category yes; print-time yes; print-severity yes; }; }; zone "quantran.com" in { type master; file "named.quantran.com"; }; zone "56.168.192.in-addr.arpa" in { type master; file "named.192.168.56"; allow-update { none; }; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; named.quantran.com: $TTL 86400 quantran.com. IN SOA dns1.quantran.com. root.quantran.com. ( 100 ; serial 3600 ; refresh 600 ; retry 604800 ; expire 86400 ) IN NS dns1.quantran.com. dns1.quantran.com. IN A 192.168.56.101 www.quantran.com. IN A 192.168.56.102 named.192.168.56: $TTL 86400 $ORIGIN 56.168.192.in-addr.arpa. @ IN SOA dns1.quantran.com. root.quantran.com. ( 100 ; serial 3600 ; refresh 600 ; retry 604800 ; expire 86400 ) ; minimum IN NS dns1.quantran.com. 101.56.168.192.in-addr.arpa. IN PTR dns1.quantran.com. 102 IN PTR www.quantran.com. When I try a normal lookup from the host (I configured so that the only nameserver the host uses is the DNS server 192.168.56.101): quan@quantran:~$ host www.quantran.com www.quantran.com has address 192.168.56.102 quan@quantran:~$ host dns1.quantran.com dns1.quantran.com has address 192.168.56.101 But when I try a reverse lookup: quan@quantran:~$ host -v 192.168.56.101 192.168.56.101 Trying "101.56.168.192.in-addr.arpa" Using domain server: Name: 192.168.56.101 Address: 192.168.56.101#53 Aliases: Host 101.56.168.192.in-addr.arpa not found: 2(SERVFAIL) Received 45 bytes from 192.168.56.101#53 in 0 ms quan@quantran:~$ host -v 192.168.56.102 192.168.56.101 Trying "102.56.168.192.in-addr.arpa" Using domain server: Name: 192.168.56.101 Address: 192.168.56.101#53 Aliases: Host 102.56.168.192.in-addr.arpa not found: 2(SERVFAIL) Received 45 bytes from 192.168.56.101#53 in 0 ms So why can't I perform a reverse lookup? Anything wrong with the zone configuration files? Thanks in advance :) Oh, here is the output from the log file /var/named/data/named.run when I perform the reverse lookup: quan@quantran:~$ host 192.168.56.102 192.168.56.101 Using domain server: Name: 192.168.56.101 Address: 192.168.56.101#53 Aliases: Host 102.56.168.192.in-addr.arpa not found: 2(SERVFAIL) /var/named/data/named.run: 02-Jun-2014 15:18:11.950 client: debug 3: client 192.168.56.1#51786: UDP request 02-Jun-2014 15:18:11.950 client: debug 5: client 192.168.56.1#51786: using view '_default' 02-Jun-2014 15:18:11.950 security: debug 3: client 192.168.56.1#51786: request is not signed 02-Jun-2014 15:18:11.950 security: debug 3: client 192.168.56.1#51786: recursion available 02-Jun-2014 15:18:11.950 client: debug 3: client 192.168.56.1#51786: query 02-Jun-2014 15:18:11.950 client: debug 10: client 192.168.56.1#51786: ns_client_attach: ref = 1 02-Jun-2014 15:18:11.950 query-errors: debug 1: client 192.168.56.1#51786: query failed (SERVFAIL) for 102.56.168.192.in-addr.arpa/IN/PTR at query.c:5428 02-Jun-2014 15:18:11.950 client: debug 3: client 192.168.56.1#51786: error 02-Jun-2014 15:18:11.950 client: debug 3: client 192.168.56.1#51786: send 02-Jun-2014 15:18:11.950 client: debug 3: client 192.168.56.1#51786: sendto 02-Jun-2014 15:18:11.951 client: debug 3: client 192.168.56.1#51786: senddone 02-Jun-2014 15:18:11.951 client: debug 3: client 192.168.56.1#51786: next 02-Jun-2014 15:18:11.951 client: debug 10: client 192.168.56.1#51786: ns_client_detach: ref = 0 02-Jun-2014 15:18:11.951 client: debug 3: client 192.168.56.1#51786: endrequest 02-Jun-2014 15:18:11.951 client: debug 3: client @0xb537e008: udprecv Also, I made some changes to the log section in named.conf.

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• Windows Server 2008 R2 network adapter stops working, requires hard reboot

  - by Geoff Dalgas

  TL;DR version: Turns out this was a Windows Server 2008 R2 kernel networking bug. After siccing Microsoft support on it, we (eventually) got an unpublished kernel hotfix from Microsoft to address it. If you, too, are experiencing mysterious low-level network driver failures requiring a reboot/bluescreen cycle, you might want that hotfix (or maybe Service Pack 1 whenever it is released, too.) We have been using HAProxy along with heartbeat from the Linux-HA project. We are using two linux instances to provide a failover. Each server has with their own public IP and a single IP which is shared between the two using a virtual interface (eth1:1) at IP: 69.59.196.211 The virtual interface (eth1:1) IP 69.59.196.211 is configured as the gateway for the windows servers behind them and we use ip_forwarding to route traffic. We are experiencing an occasional network outage on one of our windows servers behind our linux gateways. HAProxy will detect the server is offline which we can verify by remoting to the failed server and attempting to ping the gateway: Pinging 69.59.196.211 with 32 bytes of data: Reply from 69.59.196.220: Destination host unreachable. Running arp -a on this failed server shows that there is no entry for the gateway address (69.59.196.211): Interface: 69.59.196.220 --- 0xa Internet Address Physical Address Type 69.59.196.161 00-26-88-63-c7-80 dynamic 69.59.196.210 00-15-5d-0a-3e-0e dynamic 69.59.196.212 00-21-5e-4d-45-c9 dynamic 69.59.196.213 00-15-5d-00-b2-0d dynamic 69.59.196.215 00-21-5e-4d-61-1a dynamic 69.59.196.217 00-21-5e-4d-2c-e8 dynamic 69.59.196.219 00-21-5e-4d-38-e5 dynamic 69.59.196.221 00-15-5d-00-b2-0d dynamic 69.59.196.222 00-15-5d-0a-3e-09 dynamic 69.59.196.223 ff-ff-ff-ff-ff-ff static 224.0.0.22 01-00-5e-00-00-16 static 224.0.0.252 01-00-5e-00-00-fc static 225.0.0.1 01-00-5e-00-00-01 static On our linux gateway instances arp -a shows: peak-colo-196-220.peak.org (69.59.196.220) at <incomplete> on eth1 stackoverflow.com (69.59.196.212) at 00:21:5e:4d:45:c9 [ether] on eth1 peak-colo-196-215.peak.org (69.59.196.215) at 00:21:5e:4d:61:1a [ether] on eth1 peak-colo-196-219.peak.org (69.59.196.219) at 00:21:5e:4d:38:e5 [ether] on eth1 peak-colo-196-222.peak.org (69.59.196.222) at 00:15:5d:0a:3e:09 [ether] on eth1 peak-colo-196-209.peak.org (69.59.196.209) at 00:26:88:63:c7:80 [ether] on eth1 peak-colo-196-217.peak.org (69.59.196.217) at 00:21:5e:4d:2c:e8 [ether] on eth1 Why would arp occasionally set the entry for this failed server as <incomplete>? Should we be defining our arp entries statically? I've always left arp alone since it works 99% of the time, but in this one instance it appears to be failing. Are there any additional troubleshooting steps we can take help resolve this issue? THINGS WE HAVE TRIED I added a static arp entry for testing on one of the linux gateways which still didn't help. root@haproxy2:~# arp -a peak-colo-196-215.peak.org (69.59.196.215) at 00:21:5e:4d:61:1a [ether] on eth1 peak-colo-196-221.peak.org (69.59.196.221) at 00:15:5d:00:b2:0d [ether] on eth1 stackoverflow.com (69.59.196.212) at 00:21:5e:4d:45:c9 [ether] on eth1 peak-colo-196-219.peak.org (69.59.196.219) at 00:21:5e:4d:38:e5 [ether] on eth1 peak-colo-196-209.peak.org (69.59.196.209) at 00:26:88:63:c7:80 [ether] on eth1 peak-colo-196-217.peak.org (69.59.196.217) at 00:21:5e:4d:2c:e8 [ether] on eth1 peak-colo-196-220.peak.org (69.59.196.220) at 00:21:5e:4d:30:8d [ether] PERM on eth1 root@haproxy2:~# arp -i eth1 -s 69.59.196.220 00:21:5e:4d:30:8d root@haproxy2:~# ping 69.59.196.220 PING 69.59.196.220 (69.59.196.220) 56(84) bytes of data. --- 69.59.196.220 ping statistics --- 7 packets transmitted, 0 received, 100% packet loss, time 6006ms Rebooting the windows web server solves this issue temporarily with no other changes to the network but our experience shows this issue will come back. Swapping network cards and switches I noticed the link light on the port of the switch for the failed windows server was running at 100Mb instead of 1Gb on the failed interface. I moved the cable to several other open ports and the link indicated 100Mb for each port that I tried. I also swapped the cable with the same result. I tried changing the properties of the network card in windows and the server locked up and required a hard reset after clicking apply. This windows server has two physical network interfaces so I have swapped the cables and network settings on the two interfaces to see if the problem follows the interface. If the public interface goes down again we will know that it is not an issue with the network card. (We also tried another switch we have on hand, no change) Changing network hardware driver versions We've had the same problem with the latest Broadcom driver, as well as the built-in driver that ships in Windows Server 2008 R2. Replacing network cables As a last ditch effort we remembered another change that occurred was the replacement of all of the patch cords between our servers / switch. We had purchased two sets, one green of lengths 1ft - 3ft for the private interfaces and another set of red cables for the public interfaces. We swapped out all of the public interface patch cables with a different brand and ran our servers without issue for a full week ... aaaaaand then the problem recurred. Disable checksum offload, remove TProxy We also tried disabling TCP/IP checksum offload in the driver, no change. We're now pulling out TProxy and moving to a more traditional x-forwarded-for network arrangement without any fancy IP address rewriting. We'll see if that helps. Switch Virtualization providers On the off chance this was related to Hyper-V in some way (we do host Linux VMs on it), we switched to VMWare Server. No change. Switch host model We've reached the end of our troubleshooting rope and are now formally involving Microsoft support. They recommended changing the host model: http://en.wikipedia.org/wiki/Host_model http://technet.microsoft.com/en-us/magazine/2007.09.cableguy.aspx We did that, and.. we'll see.

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• Nginx & Apache Cannot get try_files to work with permalinks

  - by tcherokee

  I have been working on this for the past two weeks not and for some reason I cannot seem to get nginx's try_files to work with my wordpress permalinks. I am hoping someone will be able to tell me where I am going wrong and also hopefully tell me if I made any major errors with my configurations as well (I am an nginx newbie... but learning :) ). Here are my Configuration files nginx.conf user www-data; worker_processes 4; pid /var/run/nginx.pid; events { worker_connections 768; # multi_accept on; } http { ## # Basic Settings ## sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; # server_tokens off; # server_names_hash_bucket_size 64; # server_name_in_redirect off; include /etc/nginx/mime.types; default_type application/octet-stream; ## # Logging Settings ## # Defines the cache log format, cache log location # and the main access log location. log_format cache '***$time_local ' '$upstream_cache_status ' 'Cache-Control: $upstream_http_cache_control ' 'Expires: $upstream_http_expires ' '$host ' '"$request" ($status) ' '"$http_user_agent" ' ; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } mydomain.com.conf server { listen 123.456.78.901:80; # IP goes here. server_name www.mydomain.com mydomain.com; #root /var/www/mydomain.com/prod; index index.php; ## mydomain.com -> www.mydomain.com (301 - Permanent) if ($host !~* ^(www|dev)) { rewrite ^/(.*)$ $scheme://www.$host/$1 permanent; } # Add trailing slash to */wp-admin requests. rewrite /wp-admin$ $scheme://$host$uri/ permanent; # All media (including uploaded) is under wp-content/ so # instead of caching the response from apache, we're just # going to use nginx to serve directly from there. location ~* ^/(wp-content|wp-includes)/(.*)\.(jpg|png|gif|jpeg|css|js|m$ root /var/www/mydomain.com/prod; } # Don't cache these pages. location ~* ^/(wp-admin|wp-login.php) { proxy_pass http://backend; } location / { if ($http_cookie ~* "wordpress_logged_in_[^=]*=([^%]+)%7C") { set $do_not_cache 1; } proxy_cache_key "$scheme://$host$request_uri $do_not_cache"; proxy_cache main; proxy_pass http://backend; proxy_cache_valid 30m; # 200, 301 and 302 will be cached. # Fallback to stale cache on certain errors. # 503 is deliberately missing, if we're down for maintenance # we want the page to display. #try_files $uri $uri/ /index.php?q=$uri$args; #try_files $uri =404; proxy_cache_use_stale error timeout invalid_header http_500 http_502 http_504 http_404; } # Cache purge URL - works in tandem with WP plugin. # location ~ /purge(/.*) { # proxy_cache_purge main "$scheme://$host$1"; # } # No access to .htaccess files. location ~ /\.ht { deny all; } } # End server gzip.conf # Gzip Configuration. gzip on; gzip_disable msie6; gzip_static on; gzip_comp_level 4; gzip_proxied any; gzip_types text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript; proxy.conf # Set proxy headers for the passthrough proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; add_header X-Cache-Status $upstream_cache_status; backend.conf upstream backend { # Defines backends. # Extracting here makes it easier to load balance # in the future. Needs to be specific IP as Plesk # doesn't have Apache listening on localhost. ip_hash; server 127.0.0.1:8001; # IP goes here. } cache.conf # Proxy cache and temp configuration. proxy_cache_path /var/www/nginx_cache levels=1:2 keys_zone=main:10m max_size=1g inactive=30m; proxy_temp_path /var/www/nginx_temp; proxy_cache_key "$scheme://$host$request_uri"; proxy_redirect off; # Cache different return codes for different lengths of time # We cached normal pages for 10 minutes proxy_cache_valid 200 302 10m; proxy_cache_valid 404 1m; The two commented out try_files in location \ of the mydomain config files are the ones I tried. This error I found in the error log can be found below. ...rewrite or internal redirection cycle while internally redirecting to "/index.php" Thanks in advance

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• Network throughput issue (ARP-related)

  - by Joel Coel

  The small college where I work is having some very strange network issues. I'm looking for any advice or ideas here. We were fine over the summer, but the trouble began few days after students returned to campus in force for the fall term. Symptoms The main symptom is that internet access will work, but it's very slow... often to the point of timeouts. As an example, a typical result from Speedtest.net will return .4Mbps download, but allow 3 to 8 Mbps upload speed. Lesser symptoms may include severely limited performance transferring data to and from our file server, or even in some cases the inability to log in to the computer (cannot reach the domain controller). The issue crosses multiple vlans, and has effected devices on nearly every vlan we operate. The issue does not impact all machines on the network. An unaffected machine will typically see at least 11Mbps download from speedtest.net, and perhaps much more depending on larger campus traffic patterns at the time. There is one variation on the larger issue. We have one vlan where users were unable to log into nearly all of the machines at all. IT staff would log in using a local administrator account (or in some cases cached credentials), and from there a release/renew or pinging the gateway would allow the machine to work... for a while. Complicating this issue is that this vlan covers our computer labs, which use software called Deep Freeze to completely reset the hard drives after a reboot. It could just the same issue manifesting differently because of stale data on machines that have not permanently altered low-level info for weeks. We were able to solve this, however, by creating a new vlan and moving the labs over to the new vlan wholesale. Instigations Eventually we noticed that the effected machines all had recent dhcp leases. We can predict when a machine will become "slow" by watching when a dhcp lease comes up for renewal. We played with setting the lease time very short for a test vlan, but all that did was remove our ability to predict when the machine would become slow. Machines with static IPs have pretty much always worked normally. Manually releasing/renewing an address will never cause a machine to become slow. In fact, in some cases this process has fixed a machine in that state. Most of the time, though, it doesn't help. We also noticed that mobile machines like laptops are likely to become slow when they cross to new vlans. Wireless on campus is divided up into "zones", where each zone maps to a small set of buildings. Moving to a new building can place you in a zone, thereby causing you to get a new address. A machine resuming from sleep mode is also very likely to be slow. Mitigations Sometimes, but not always, clearing the arp cache on an effected machine will allow it to work normally again. As already mentioned, releasing/renewing a local machine's IP address can fix that machine, but it's not guaranteed. Pinging the default gateway can also sometimes help with a slow machine. What seems to help most to mitigate the issue is clearing the arp cache on our core layer-3 switch. This switch is used for our dhcp system as the default gateway on all vlans, and it handles inter-vlan routing. The model is a 3Com 4900SX. To try to mitigate the issue, we have the cache timeout set on the switch all the way down to the lowest possible time, but it hasn't helped. I also put together a script that runs every few minutes to automatically connect to the switch and reset the cache. Unfortunately, this does not always work, and can even cause some machines to end up in the slow state for a short time (though these seem to correct themselves after a few minutes). We currently have a scheduled job that runs every 10 minutes to force the core switch to clear it's ARP cache, but this is far from perfect or desirable. Reproduction We now have a test machine that we can force into the slow state at will. It is connected to a switch with ports set up for each of our vlans. We make the machine slow by connecting to different vlans, and after a new connection or two it will be slow. It's also worth noting in this section that this has happened before at the start of prior terms, but in the past the problem has gone away on it's own after a few days. It solved itself before we had a chance to do much diagnostic work... hence why we've allowed it to drag so long into the term this time 'round; the expectation was this would be a short-lived situation. Other Factors It's worth mentioning that we have had about half a dozen switches just outright fail over the last year. These are mainly 2003/2004-era 3Coms (mostly 4200's) that were all put in at about the same time. They should still be covered under warranty, buy HP has made getting service somewhat difficult. Mostly in power supplies that have failed, but in a couple cases we have used a power supply from a switch with a failed mainboard to bring a switch with a failed power supply back to life. We do have UPS devices on all but three of four switches now, but that was not the case when I started two and a half years ago. Severe budget constraints (we were on the Dept. of Ed's financially challenged institutions list a couple years back) have forced me to look to the likes of Netgear and TrendNet for replacements, but so far these low-end models seem to be holding their own. It's also worth mentioning that the big change on our network this summer was migrating from a single cross-campus wireless SSID to the zoned approach mentioned earlier. I don't think this is the source of the issue, as like I've said: we've seen this before. However, it's possible this is exacerbating the issue, and may be much of the reason it's been so hard to isolate. Diagnosis At first it seemed clear to us, given the timing and persistent nature of the problem, that the source of the issue was an infected (or malicious) student machine doing ARP cache poisoning. However, repeated attempts to isolate the source have failed. Those attempts include numerous wireshark packet traces, and even taking entire buildings offline for brief periods. We have not been able even to find a smoking gun bad ARP entry. My current best guess is an overloaded or failing core switch, but I'm not sure on how to test for this, and the cost of replacing it blindly is steep. Again, any ideas appreciated.

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• no namenode error in pseudo-mode

  - by Anshu Basia

  I'm new to hadoop and is in learning phase. As per Hadoop Definitve guide, i have set up my hadoop in pseudo distributed mode and everything was working fine. I was even able to execute all the examples from chapter 3 yesterday. Today, when i rebooted my unix and tried to run start-dfs.sh and then tried http://localhost/50070....it is showing error and when i try to stop dfs (stop-dfs.sh) it says no namenode to stop. I have been googling the issue but no result. Also, when i format my namenode again...everything starts working fine and i'm able to connect to the localhost/50070 and even replicate files and directories in hdfs but as soon as i restart my linux and try to connect to hdfs the same problem comes up. Below is the error log: ************************************************************/ 2011-06-22 15:45:55,249 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = ubuntu/127.0.1.1 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.203.0 STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-203 -r 1099333; compiled by 'oom' on Wed May 4 07:57:50 PDT 2011 ************************************************************/ 2011-06-22 15:45:56,383 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2011-06-22 15:45:56,455 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered. 2011-06-22 15:45:56,494 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s). 2011-06-22 15:45:56,494 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system started 2011-06-22 15:45:57,007 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered. 2011-06-22 15:45:57,031 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists! 2011-06-22 15:45:57,059 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm registered. 2011-06-22 15:45:57,070 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source NameNode registered. 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: VM type = 32-bit 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: 2% max memory = 19.33375 MB 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: capacity = 2^22 = 4194304 entries 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: recommended=4194304, actual=4194304 2011-06-22 15:45:57,854 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: fsOwner=anshu 2011-06-22 15:45:57,854 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: supergroup=supergroup 2011-06-22 15:45:57,854 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isPermissionEnabled=true 2011-06-22 15:45:57,868 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: dfs.block.invalidate.limit=100 2011-06-22 15:45:57,869 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s) 2011-06-22 15:45:58,769 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Registered FSNamesystemStateMBean and NameNodeMXBean 2011-06-22 15:45:58,809 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: Caching file names occuring more than 10 times **2011-06-22 15:45:58,825 INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory /tmp/hadoop-anshu/dfs/name does not exist. 2011-06-22 15:45:58,827 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed. org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-anshu/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. at org.apache.h**adoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162) 2011-06-22 15:45:58,828 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-anshu/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162) 2011-06-22 15:45:58,829 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at ubuntu/127.0.1.1 ************************************************************/ Any help is appreciated Thank-you

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• HOWTO: disable jmx in activemq network of brokers (spring, xbean)

  - by subes

  Since I've struggled a lot with this problem, I am posting my solution. Disabling jmx in an activemq network of brokers removes race conditions about the registration of the jmx connector. When starting multiple activemq servers on the same machine: Failed to start jmx connector: Cannot bind to URL [rmi://localhost:1099/jmxrmi]: javax.naming.NameAlreadyBoundException: jmxrmi [Root exception is java.rmi.AlreadyBoundException: jmxrmi] Another problem with this is, that even if you don't cause a race condition, this exception can still occur. Even when starting one broker after another while waiting for them to initialize properly in between. If one process is run by root as the first instance and the other as a normal user, somehow the user process tries to register its own jmx connector, though there already is one. Or another exception which happens when the broker that successfully registered the jmx connector goes down: Failed to start jmx connector: Cannot bind to URL [rmi://localhost:1099/jmxrmi]: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused] Those exceptions cause the network of brokers to stop working, or to not work at all. The trick to disable jmx was, that jmx had to be disabled in the connectionfactory aswell. The documentation http://activemq.apache.org/jmx.html does not say that this is needed explicitly. So I had to struggle for 2 days until I found the solution: <beans xmlns="http://www.springframework.org/schema/beans" xmlns:amq="http://activemq.apache.org/schema/core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core-5.3.1.xsd"> <!-- Spring JMS Template --> <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"> <constructor-arg ref="connectionFactory" /> </bean> <!-- Caching, sodass das jms template überhaupt nutzbar ist in sachen performance --> <bean id="connectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <constructor-arg ref="amqConnectionFactory" /> <property name="exceptionListener" ref="jmsExceptionListener" /> <property name="sessionCacheSize" value="1" /> </bean> <!-- Jeder Client verbindet sich mit seinem eigenen broker, broker sind untereinander vernetzt. Nur wenn hier nochmals jmx deaktiviert wird, bleibt es auch deaktiviert... --> <amq:connectionFactory id="amqConnectionFactory" brokerURL="vm://broker:default?useJmx=false" /> <!-- Broker suchen sich einen eigenen Port und sind gegenseitig verbunden, ergeben dadurch ein Grid. Dies zwar etwas langsamer, aber dafür ausfallsicherer. Siehe http://activemq.apache.org/networks-of-brokers.html --> <amq:broker useJmx="false" persistent="false"> <!-- Wird benötigt um JMX endgültig zu deaktivieren --> <amq:managementContext> <amq:managementContext connectorHost="localhost" createConnector="false" /> </amq:managementContext> <!-- Nun die normale Konfiguration für Network of Brokers --> <amq:networkConnectors> <amq:networkConnector networkTTL="1" duplex="true" dynamicOnly="true" uri="multicast://default" /> </amq:networkConnectors> <amq:persistenceAdapter> <amq:memoryPersistenceAdapter /> </amq:persistenceAdapter> <amq:transportConnectors> <amq:transportConnector uri="tcp://localhost:0" discoveryUri="multicast://default" /> </amq:transportConnectors> </amq:broker> With this, there is no need to specify -Dcom.sun.management.jmxremote=false for the jvm. Which somehow also didn't work for me, because the connectionfactory started the jmx connector.

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• XAML Parsing Exception

  - by e28Makaveli

  I have a simple XAML page that load fine when it is loaded as part of any application within Visual Studio. However, when I deploy this application using ClickOnce, I get the following exception: Type : System.Windows.Markup.XamlParseException, PresentationFramework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Message : Unable to cast object of type 'System.Windows.Controls.Grid' to type 'EMS.Controls.Dictionary.StatusBarControl'. Error at object 'System.Windows.Controls.Grid' in markup file 'EMS.Controls.Dictionary;component/views/statusbarcontrol.xaml'. Source : PresentationFramework Help link : LineNumber : 0 LinePosition : 0 KeyContext : UidContext : NameContext : BaseUri : pack://application:,,,/EMS.Controls.Dictionary;component/views/statusbarcontrol.xaml Data : System.Collections.ListDictionaryInternal TargetSite : Void ThrowException(System.String, System.Exception, Int32, Int32, System.Uri, System.Windows.Markup.XamlObjectIds, System.Windows.Markup.XamlObjectIds, System.Type) Stack Trace : at System.Windows.Markup.XamlParseException.ThrowException(String message, Exception innerException, Int32 lineNumber, Int32 linePosition, Uri baseUri, XamlObjectIds currentXamlObjectIds, XamlObjectIds contextXamlObjectIds, Type objectType) at System.Windows.Markup.XamlParseException.ThrowException(ParserContext parserContext, Int32 lineNumber, Int32 linePosition, String message, Exception innerException) at System.Windows.Markup.BamlRecordReader.ReadRecord(BamlRecord bamlRecord) at System.Windows.Markup.BamlRecordReader.Read(Boolean singleRecord) at System.Windows.Markup.TreeBuilderBamlTranslator.ParseFragment() at System.Windows.Markup.TreeBuilder.Parse() at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at EMS.Controls.Dictionary.StatusBarControl.InitializeComponent() at EMS.Controls.Dictionary.StatusBarControl..ctor(IDataView content) at OCC600.ReportManager.ReportPresenter.ShowQueryView(Object arg, Boolean bringForward, Type selectedDataType) at OCC600.ReportManager.ReportPresenter..ctor(IUnityContainer container) at OCC600.ReportManager.Module.Initialize() at Microsoft.Practices.Composite.Modularity.ModuleLoader.Initialize(ModuleInfo[] moduleInfos) Inner Exception --------------- Type : System.InvalidCastException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Message : Unable to cast object of type 'System.Windows.Controls.Grid' to type 'EMS.Controls.Dictionary.StatusBarControl'. Source : EMS.Controls.Dictionary Help link : Data : System.Collections.ListDictionaryInternal TargetSite : Void System.Windows.Markup.IComponentConnector.Connect(Int32, System.Object) Stack Trace : at EMS.Controls.Dictionary.StatusBarControl.System.Windows.Markup.IComponentConnector.Connect(Int32 connectionId, Object target) at System.Windows.Markup.BamlRecordReader.ReadConnectionId(BamlConnectionIdRecord bamlConnectionIdRecord) at System.Windows.Markup.BamlRecordReader.ReadRecord(BamlRecord bamlRecord) The XAML page is given below: xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:cdic="clr-namespace:EMS.Controls.Dictionary.Primitives" xmlns:dicutil="clr-namespace:OCC600.Infrastructure.Dictionary.Utility;assembly=EMS.Infrastructure.Dictionary" Loaded="ResultSetControl_Loaded" <StatusBarItem Margin="10,0, 10, 0"> <TextBlock Text="{Binding CountText}" Padding="5,0"/> </StatusBarItem> <StatusBarItem Margin="10,0"> <TextBlock Text="{Binding MemoryUsageText}" Padding="5,0"/> </StatusBarItem> <StatusBarItem Margin="10,0" MaxWidth="400"> <TextBlock Text="{Binding StatusReport.Summary}" Padding="5,0" /> </StatusBarItem> <ProgressBar Margin="20,0" Name="progBar" Width="150" Height="13" Visibility="Collapsed" > <ProgressBar.ContextMenu> <ContextMenu Name="ctxMenu" ItemsSource="{Binding ActiveWorkItems}" Visibility="{Binding Path=ActiveWorkItems.HasItems, Converter={StaticResource BooToVisConv}}"> <ContextMenu.ItemContainerStyle> <Style TargetType="{x:Type MenuItem}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type MenuItem}"> <StackPanel Height="20" Margin="10,0" Orientation="Horizontal" HorizontalAlignment="Left"> <TextBlock Text="{Binding Path=Name, Mode=OneTime}" Foreground="Black" VerticalAlignment="Center" HorizontalAlignment="Left" /> <ToggleButton Style="{StaticResource vistaGoldenToggleButtonStyle}" Padding="5,0" Content="Cancel" IsChecked="{Binding Cancel}" Margin="10,0,0,0" > </ToggleButton> </StackPanel> </ControlTemplate> </Setter.Value> </Setter> </Style> </ContextMenu.ItemContainerStyle> </ContextMenu> </ProgressBar.ContextMenu> </ProgressBar> <StatusBarItem Margin="10,0" MaxWidth="400" HorizontalAlignment="Right"> <StackPanel Orientation="Horizontal"> <TextBlock Text="Last Update:" Padding="5,0" /> <TextBlock Text="{Binding TimeStamp}" Padding="5,0" /> </StackPanel> </StatusBarItem> <!-- TODO: Put checkmark if all is well, or error if connection failed--> <StatusBarItem Style="{DynamicResource {ComponentResourceKey TypeInTargetAssembly=dc:Ribbon, ResourceId=StatusBarItemAlt}}" DockPanel.Dock="Right" Padding="6,0,32,0" > <cdic:SplitButton Margin="5,0" Padding="5,2" Style="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type cdic:SplitButtonResources}, ResourceId=vistaSplitButtonStyle}}" Mode="Split"> <cdic:SplitButton.ContextMenu> <ContextMenu > <MenuItem Header="Refresh Now" Command="{Binding ToggleConnectivityCmd}" CommandParameter="false"/> <MenuItem IsCheckable="True" IsChecked="{Binding ConnectState, Converter={StaticResource isFailedConverter}}" CommandParameter="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=IsChecked}" Header="Work Offline" Command="{Binding ToggleConnectivityCmd}"/> </ContextMenu> </cdic:SplitButton.ContextMenu> <cdic:SplitButton.Content> <StackPanel Orientation="Horizontal"> <Image x:Name="img" Source="{Binding ConnectState, Converter={StaticResource imageConverter}}" Width="16" Height="16" HorizontalAlignment="Center" VerticalAlignment="Center"/> <TextBlock Text="{Binding ConnectState}" Padding="3,0,0,0"/> </StackPanel> </cdic:SplitButton.Content> </cdic:SplitButton> </StatusBarItem> </StatusBar> </Grid> The error just seems to have come out of no where. Any ideas? TIA.

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• Django TemplateSyntaxError only on live server (templates exist)

  - by Tom

  I'm getting a strange error that only occurs on the live server. My Django templates directory is set up like so base.html two-column-base.html portfolio index.html extranet base.html index.html The portfolio pages work correctly locally on multiple machines. They inherit from either the root base.html or two-column-base.html. However, now that I've posted them to the live box (local machines are Windows, live is Linux), I get a TemplateSyntaxError: "Caught TemplateDoesNotExist while rendering: base.html" when I try to load any portfolio pages. It seems to be a case where the extends tag won't work in that root directory (???). Even if I do a direct_to_template on two-column-base.html (which extends base.html), I get that error. The extranet pages all work perfectly, but those templates all live inside the /extranet folder and inherit from /extranet/base.html. Possible issues I've checked: file permissions on the server are fine the template directory is correct on the live box (I'm using os.path.dirname(os.path.realpath(__file__)) to make things work across machines) files exist and the /templates directories exactly match my local copy removing the {% extends %} block from the top of any broken template causes the templates to render without a problem manually starting a shell session and calling get_template on any of the files works, but trying to render it blows up with the same exception on any of the extended templates. Doing the same with base.html, it renders perfectly (base.html also renders via direct_to_template) Django 1.2, Python 2.6 on Webfaction. Apologies in advance because this is my 3rd or 4th "I'm doing something stupid" question in a row. The only x-factor I can think of is this is my first time using Mercurial instead ofsvn. Not sure how I could have messed things up via that. EDIT: One possible source of problems: local machine is Python 2.5, live is 2.6. Here's a traceback of me trying to render 'two-column-base.html', which extends 'base.html'. Both files are in the same directory, so if it can find the first, it can find the second. c is just an empty Context object. >>> render_to_string('two-column-base.html', c) Traceback (most recent call last): File "<console>", line 1, in <module> File "/home/lightfin/webapps/django/lib/python2.6/django/template/loader.py", line 186, in render_to_string return t.render(context_instance) File "/home/lightfin/webapps/django/lib/python2.6/django/template/__init__.py", line 173, in render return self._render(context) File "/home/lightfin/webapps/django/lib/python2.6/django/template/__init__.py", line 167, in _render return self.nodelist.render(context) File "/home/lightfin/webapps/django/lib/python2.6/django/template/__init__.py", line 796, in render bits.append(self.render_node(node, context)) File "/home/lightfin/webapps/django/lib/python2.6/django/template/debug.py", line 72, in render_node result = node.render(context) File "/home/lightfin/webapps/django/lib/python2.6/django/template/loader_tags.py", line 103, in render compiled_parent = self.get_parent(context) File "/home/lightfin/webapps/django/lib/python2.6/django/template/loader_tags.py", line 100, in get_parent return get_template(parent) File "/home/lightfin/webapps/django/lib/python2.6/django/template/loader.py", line 157, in get_template template, origin = find_template(template_name) File "/home/lightfin/webapps/django/lib/python2.6/django/template/loader.py", line 138, in find_template raise TemplateDoesNotExist(name) TemplateSyntaxError: Caught TemplateDoesNotExist while rendering: base.html I'm wondering if this is somehow related to the template caching that was just added to Django. EDIT 2 (per lazerscience): template-related settings: import os PROJECT_ROOT = os.path.dirname(os.path.realpath(__file__)) TEMPLATE_DIRS = ( os.path.join(PROJECT_ROOT, 'templates'), ) sample view: def project_list(request, jobs, extra_context={}): context = { 'jobs': jobs, } print context context.update(extra_context) return render_to_response('portfolio/index.html', context, context_instance=RequestContext(request)) The templates in reverse-order are: http://thosecleverkids.com/junk/index.html http://thosecleverkids.com/junk/portfolio-base.html http://thosecleverkids.com/junk/two-column-base.html http://thosecleverkids.com/junk/base.html though in the real project the first two live in a directory called "portfolio".

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• Safe, standard way to load images in ListView on a different thread?

  - by Po

  Before making this question, I have searched and read these ones: http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview http://stackoverflow.com/questions/1409623/android-issue-with-lazy-loading-images-into-a-listview My problem is I have a ListView, where: Each row contains an ImageView, whose content is to be loaded from the internet Each row's view is recycled as in ApiDemo's List14 What I want ultimately: Load images lazily, only when the user scrolls to them Load images on different thread(s) to maintain responsiveness My current approach: In the adapter's getView() method, apart from setting up other child views, I launch a new thread that loads the Bitmap from the internet. When that loading thread finishes, it returns the Bitmap to be set on the ImageView (I do this using AsyncTask or Handler). Because I recycle ImageViews, it may be the case that I first want to set a view with Bitmap#1, then later want to set it to Bitmap#2 when the user scrolls down. Bitmap#1 may happen to take longer than Bitmap#2 to load, so it may end up overwriting Bitmap#2 on the view. I solve this by maintaining a WeakHashMap that remembers the last Bitmap I want to set for that view. Below is somewhat a pseudocode for my current approach. I've ommitted other details like caching, just to keep the thing clear. public class ImageLoader { // keeps track of the last Bitmap we want to set for this ImageView private static final WeakHashMap<ImageView, AsyncTask> assignments = new WeakHashMap<ImageView, AsyncTask>(); /** Asynchronously sets an ImageView to some Bitmap loaded from the internet */ public static void setImageAsync(final ImageView imageView, final String imageUrl) { // cancel whatever previous task AsyncTask oldTask = assignments.get(imageView); if (oldTask != null) { oldTask.cancel(true); } // prepare to launch a new task to load this new image AsyncTask<String, Integer, Bitmap> newTask = new AsyncTask<String, Integer, Bitmap>() { protected void onPreExecute() { // set ImageView to some "loading..." image } protected Bitmap doInBackground(String... urls) { return loadFromInternet(imageUrl); } protected void onPostExecute(Bitmap bitmap) { // set Bitmap if successfully loaded, or an "error" image if (bitmap != null) { imageView.setImageBitmap(bitmap); } else { imageView.setImageResource(R.drawable.error); } } }; newTask.execute(); // mark this as the latest Bitmap we want to set for this ImageView assignments.put(imageView, newTask); } /** returns (Bitmap on success | null on error) */ private Bitmap loadFromInternet(String imageUrl) {} } Problem I still have: what if the Activity gets destroyed while some images are still loading? Is there any risk when the loading thread calls back to the ImageView later, when the Activity is already destroyed? Moreover, AsyncTask has some global thread-pool underneath, so if lengthy tasks are not canceled when they're not needed anymore, I may end up wasting time loading things users don't see. My current design of keeping this thing globally is too ugly, and may eventually cause some leaks that are beyond my understanding. Instead of making ImageLoader a singleton like this, I'm thinking of actually creating separate ImageLoader objects for different Activities, then when an Activity gets destroyed, all its AsyncTask will be canceled. Is this too awkward? Anyway, I wonder if there is a safe and standard way of doing this in Android. In addition, I don't know iPhone but is there a similar problem there and do they have a standard way to do this kind of task? Many thanks.

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• Stored proc running 30% slower through Java versus running directly on database

  - by James B

  Hi All, I'm using Java 1.6, JTDS 1.2.2 (also just tried 1.2.4 to no avail) and SQL Server 2005 to create a CallableStatement to run a stored procedure (with no parameters). I am seeing the Java wrapper running the same stored procedure 30% slower than using SQL Server Management Studio. I've run the MS SQL profiler and there is little difference in I/O between the two processes, so I don't think it's related to query plan caching. The stored proc takes no arguments and returns no data. It uses a server-side cursor to calculate the values that are needed to populate a table. I can't see how the calling a stored proc from Java should add a 30% overhead, surely it's just a pipe to the database that SQL is sent down and then the database executes it....Could the database be giving the Java app a different query plan?? I've posted to both the MSDN forums, and the sourceforge JTDS forums (topic: "stored proc slower in JTDS than direct in DB") I was wondering if anyone has any suggestions as to why this might be happening? Thanks in advance, -James (N.B. Fear not, I will collate any answers I get in other forums together here once I find the solution) Java code snippet: sLogger.info("Preparing call..."); stmt = mCon.prepareCall("SP_WB200_POPULATE_TABLE_limited_rows"); sLogger.info("Call prepared. Executing procedure..."); stmt.executeQuery(); sLogger.info("Procedure complete."); I have run sql profiler, and found the following: Java app : CPU: 466,514 Reads: 142,478,387 Writes: 284,078 Duration: 983,796 SSMS : CPU: 466,973 Reads: 142,440,401 Writes: 280,244 Duration: 769,851 (Both with DBCC DROPCLEANBUFFERS run prior to profiling, and both produce the correct number of rows) So my conclusion is that they both execute the same reads and writes, it's just that the way they are doing it is different, what do you guys think? It turns out that the query plans are significantly different for the different clients (the Java client is updating an index during an insert that isn't in the faster SQL client, also, the way it is executing joins is different (nested loops Vs. gather streams, nested loops Vs index scans, argh!)). Quite why this is, I don't know yet (I'll re-post when I do get to the bottom of it) Epilogue I couldn't get this to work properly. I tried homogenising the connection properties (arithabort, ansi_nulls etc) between the Java and Mgmt studio clients. It ended up the two different clients had very similar query/execution plans (but still with different actual plan_ids). I posted a summary of what I found to the MSDN SQL Server forums as I found differing performance not just between a JDBC client and management studio, but also between Microsoft's own command line client, SQLCMD, I also checked some more radical things like network traffic too, or wrapping the stored proc inside another stored proc, just for grins. I have a feeling the problem lies somewhere in the way the cursor was being executed, and it was somehow giving rise to the Java process being suspended, but why a different client should give rise to this different locking/waiting behaviour when nothing else is running and the same execution plan is in operation is a little beyond my skills (I'm no DBA!). As a result, I have decided that 4 days is enough of anyone's time to waste on something like this, so I will grudgingly code around it (if I'm honest, the stored procedure needed re-coding to be more incremental instead of re-calculating all data each week anyway), and chalk this one down to experience. I'll leave the question open, big thanks to everyone who put their hat in the ring, it was all useful, and if anyone comes up with anything further, I'd love to hear some more options...and if anyone finds this post as a result of seeing this behaviour in their own environments, then hopefully there's some pointers here that you can try yourself, and hope fully see further than we did. I'm ready for my weekend now! -James

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• The weirdest css issue I have ever seen

  - by jasondavis

  Below I have 2 css codes for a div, please note that the first one does not even have a div on the page or ANYTHING with it's name on it. I can also rename it to anything. Now where the weird part comes in. The second bit of code below has a width of 520px, the only way that the div on the page will be 520px is if I leave the css code thats above that one, the 1st one with no existing div on the page HAS to be on the page for the second css code to work, At first I thought it has to be a browser caching issue, so I clear my cache and that does nothing, I then try 2 other browsers and they all have the same result. I add the 1st bit of code into the page and the second bit works, I take the first bit away and the second bit does not work. AM i overlooking something here? .commentwrappsdfsde2{width:950px;margin:0 0;padding:0;} .commentwrapper{width:520px;margin-right:auto;margin-left:auto;} Here is the whole page code <style> <!-- css for user photos--> div.imageSub img.female { border-top: 1px solid #FF3399; } div.imageSub img.male { border-top: 1px solid #3399FF; } div.imageSub img { z-index: 1; margin: 0; display: block; } div.imageSub div { position: relative; margin: -15px 0 0; padding: 5px; height: 5px; line-height: 4px; text-align: center; overflow: hidden; font-family:Trebuchet MS,Helvetica,sans-serif; font-size:12px; font-weight: bold; } div.imageSub div.blackbg { z-index: 2; background-color: #000; -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=70)"; filter: alpha(opacity=70); opacity: 0.5; } div.imageSub div.label { z-index: 3; color: white; } <!-- end photo block--> /* Comments */ .commentwrappsdfsde2{width:950px;margin:0 0;padding:0;} .commentwrapper{width:520px;margin-right:auto;margin-left:auto;} #comments ol.commentlist li { list-style-type:none; padding:20px; background:none; } #comments ol.commentlist li.thread-even { background:#f6f6f6; border-top:1px solid #e3e3e3; border-bottom:1px solid #e3e3e3; } #comments ul.children li ul.children,#comments .commentlist{padding:0;} </style> <div class="commentwrapper"> <div id="comments"> <ol class="commentlist"> <li class="comment thread-even " > Comment 1 </li> </ol> </div> </div>

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• Is the Cloud ready for an Enterprise Java web application? Seeking a JEE hosting advice.

  - by Jakub Holý

  Greetings to all the smart people around here! I'd like to ask whether it is feasible or a good idea at all to deploy a Java enterprise web application to a Cloud such as Amazon EC2. More exactly, I'm looking for infrastructure options for an application that shall handle few hundred users with long but neither CPU nor memory intensive sessions. I'm considering dedicated servers, virtual private servers (VPSs) and EC2. I've noticed that there is a project called JBoss Cloud so people are working on enabling such a deployment, on the other hand it doesn't seem to be mature yet and I'm not sure that the cloud is ready for this kind of applications, which differs from the typical cloud-based applications like Twitter. Would you recommend to deploy it to the cloud? What are the pros and cons? The application is a Java EE 5 web application whose main function is to enable users to compose their own customized Product by combining the available Parts. It uses stateless and stateful session beans and JPA for persistence of entities to a RDBMS and fetches information about Parts from the company's inventory system via a web service. Aside of external users it's used also by few internal ones, who are authenticated against the company's LDAP. The application should handle around 300-400 concurrent users building their product and should be reasonably scalable and available though these qualities are only of a medium importance at this stage. I've proposed an architecture consisting of a firewall (FW) and load balancer supporting sticky sessions and https (in the Cloud this would be replaced with EC2's Elastic Load Balancing service and FW on the app. servers, in a physical architecture the load-balancer would be a HW), then two physical clustered application servers combined with web servers (so that if one fails, a user doesn't loose his/her long built product) and finally a database server. The DB server would need a slave backup instance that can replace the master instance if it fails. This should provide reasonable availability and fault tolerance and provide good scalability as long as a single RDBMS can keep with the load, which should be OK for quite a while because most of the operations are done in the memory using a stateful bean and only occasionally stored or retrieved from the DB and the amount of data is low too. A problematic part could be the dependency on the remote inventory system webservice but with good caching of its outputs in the application it should be OK too. Unfortunately I've only vague idea of the system resources (memory size, number and speed of CPUs/cores) that such an "average Java EE application" for few hundred users needs. My rough and mostly unfounded estimate based on actual Amazon offerings is that 1.7GB and a single, 2-core "modern CPU" with speed around 2.5GHz (the High-CPU Medium Instance) should be sufficient for any of the two application servers (since we can handle higher load by provisioning more of them). Alternatively I would consider using the Large instance (64b, 7.5GB RAM, 2 cores at 1GHz) So my question is whether such a deployment to the cloud is technically and financially feasible or whether dedicated/VPS servers would be a better option and whether there are some real-world experiences with something similar. Thank you very much! /Jakub Holy PS: I've found the JBoss EAP in a Cloud Case Study that shows that it is possible to deploy a real-world Java EE application to the EC2 cloud but unfortunately there're no details regarding topology, instance types, or anything :-(

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• My PNG has transparency, but after saving with PHP GD, transparency is lost [closed]

  - by Harry Stroker

  I found the solution to my problem. See below the original post and completely at the bottom my solution. I made a stupid mistake :) First I crop an image and then save it to a png file. Right after this, I also show the image. However, the saved png does not have transparency and the shown one has. What is going on? $this->resource = imagecreatefrompng($this->url); imagealphablending($this->resource, false); imagesavealpha($this->resource, true); $newResource = imagecreatetruecolor($destWidth, $destHeight); imagealphablending($newResource, false); imagesavealpha($newResource, true); $resample = imagecopyresampled($newResource,$this->resource,0,0,$srcX1,$srcY1,$destWidth,$destHeight,$srcX2-$srcX1, $srcY2-$srcY1); imagedestroy($this->resource); $this->resource = $newResource; // SAVING imagepng($this->resource, $destination, 100); // SHOWING header('Content-type: image/png'); imagepng($this->resource); The reason I also save the image is for caching. If the script is executed on a png, it saves a cached png. Next time the image is requested, the png file will be shown, but it has lost its transparency. Even stranger: When I save that cached png image as (within Firefox), it saves it suddenly as a jpg, even though the extension was png. Downloading the cached png using chrome and opening it in Photoshop gives the error: "file-format module cannot parse the file". I will show you the shown PNG and the generated PNG: http://www.foodmuseum.nl/SaveProblemTransparency.png Once I try to show that saved PNG with the GD library, it gives me an error. EDIT NO NO NO NO THIS IS NOT A DUPLICATE!!!... I ALREADY USED THEIR SOLUTION. The solution in the supposedly duplicate works for showing my image. But I also try to save it with the exact same resource, but then it has no transparency. EDIT 2 - SOLUTION I found out what the problem was. It was a stupid mistake. The script I provided above were cut out of a class and placed as sequential code, while in real this is not what exactly happened. The save image function: function saveImage($destination,$quality = 90) { $this->loadResource(); switch($extension){ default: case 'JPG': case 'jpg': imagejpeg($this->resource, $destination, $quality); break; case 'gif': imagegif($this->resource, $destination); break; case 'png': imagepng($this->resource, $destination); break; case 'gd2': imagegd2($this->resource, $destination); break; } } However... $extension does not exist. I fixed it by adding: $extension = $this->getExtension($destination);

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• How to Stich to Image objects in Java

  - by Imran

  Hi, I have a scenario in which i`m getting a number of tiles (e.g.12) from my mapping server. Now for buffering and offline functions I need to join them all back again so that we have to deal with 1 single image object instead of 12. I ve tried to do it without JAI my code is below. package imagemerge; import java.awt.*; import java.awt.image.*; import java.awt.event.*; public class ImageSticher extends WindowAdapter { Image tile1; Image tile2; Image result; ColorModel colorModel; int width,height,widthr,heightr; //int t1,t2; int t12[]; public ImageSticher() { } public ImageSticher (Image img1,Image img2,int w,int h) { tile1=img1; tile2=img2; width=w; height=h; colorModel=ColorModel.getRGBdefault(); } public Image horizontalStich() throws Exception { widthr=width*2; heightr=height; t12=new int[widthr * heightr]; int t1[]=new int[width*height]; PixelGrabber p1 =new PixelGrabber(tile1, 0, 0, width, height, t1, 0, width); p1.grabPixels(); int t2[]=new int[width*height]; PixelGrabber p2 =new PixelGrabber(tile2, 0, 0, width, height, t1, 0, width); p2.grabPixels(); int y, x, rp, rpi; int red1, red2, redr; int green1, green2, greenr; int blue1, blue2, bluer; int alpha1, alpha2, alphar; for(y=0;y<heightr;y++) { for(x=0;x<widthr;x++) { //System.out.println(x); rpi=y*widthr+x; // index of resulting pixel; rp=0; //initializing resulting pixel System.out.println(rpi); if(x<(widthr/2)) // x is less than width , copy first tile { //System.out.println("tile1="+x); blue1 = t1[rpi] & 0x00ff; // ERROR occurs here green1=(t1[rpi] >> 8) & 0x00ff; red1=(t1[rpi] >> 16) & 0x00ff; alpha1 = (t1[rpi] >> 24) & 0x00ff; redr = (int)(red1 * 1.0); // copying red band pixel into redresult,,,,1.0 is the alpha valye redr = (redr < 0)?(0):((redr>255)?(255):(redr)); greenr = (int)(green1 * 1.0); // redr = (int)(red1 * 1.0); // greenr = (greenr < 0)?(0):((greenr>255)?(255):(greenr)); bluer = (int)(blue1 * 1.0); bluer = (bluer < 0)?(0):((bluer>255)?(255):(bluer)); alphar = 255; //resulting pixel computed rp = (((((alphar << 8) + (redr & 0x0ff)) << 8) + (greenr & 0x0ff)) << 8) + (bluer & 0x0ff); } else // index is ahead of half way...copy second tile { blue2 = t2[rpi] & 0x00ff; // blue band bit of first tile green2=(t2[rpi] >> 8) & 0x00ff; red2=(t2[rpi] >> 16) & 0x00ff; alpha2 = (t2[rpi] >> 24) & 0x00ff; redr = (int)(red2 * 1.0); // copying red band pixel into redresult,,,,1.0 is the alpha valye redr = (redr < 0)?(0):((redr>255)?(255):(redr)); greenr = (int)(green2 * 1.0); // redr = (int)(red2 * 1.0); // greenr = (greenr < 0)?(0):((greenr>255)?(255):(greenr)); bluer = (int)(blue2 * 1.0); bluer = (bluer < 0)?(0):((bluer>255)?(255):(bluer)); alphar = 255; //resulting pixel computed rp = (((((alphar << 8) + (redr & 0x0ff)) << 8) + (greenr & 0x0ff)) << 8) + (bluer & 0x0ff); } t12[rpi] = rp; // copying resulting pixel in the result int array which will be converted to image } } MemoryImageSource mis; if (t12!=null) { mis = new MemoryImageSource(widthr, heightr, colorModel, t12, 0, widthr); result = Toolkit.getDefaultToolkit().createImage(mis); return result; } return null; } } now to check the my theory Im trying to join or stich two tiles horizontaly but im getting the error : java.lang.ArrayIndexOutOfBoundsException: 90000 at imagemerge.ImageSticher.horizontalStich(ImageSticher.java:69) at imageStream.ImageStream.getImage(ImageStream.java:75) at imageStream.ImageStream.main(ImageStream.java:28) is there some kind of limitation because when stiching two images of 300 x 300 horizontally it means the resulting image will be 600 x 300 ... that would make 180000 index size but its giving error at 90000, what am I doing wrong here

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• C# WCF client configuration for X509 secured web service over https

  - by Kam

  Hi guys I been pulling my hair out for the past few days trying to connect to a web service using .Net 3.5 and WCF (have also tried using WSE 3.0) without much luck. The web service is hosted by a 3rd party and we can access via https. They also make use of X509 certificates for security, to sign the message. I've been given some basic info and am able to connect and test the service using SOAP UI 3.5 without any problems, so we know that this is not the issue. Just trying to get it done in code! I've added the X509 certificate into the certificate store using the mmc snap-in, and using tracing and logging i can see that the message is being signed, just unable to see which part i have got wrong. Any healp GREATLY appreciated :) I've been given an offline WSDL file, which I have imported in as a service reference is VS 2008. My calling code looks like so, simple enough: ServicePointManager.ServerCertificateValidationCallback = delegate(object sender,X509Certificate certificate,X509Chain chain, SslPolicyErrors sslErrors) { return true; }; GatewayClient gateway = new GatewayClient(); CheckStatusResponse response = gateway.CheckLineStatus(); And my config looks like so: <basicHttpBinding> <binding name="Gateway_1.0" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <security mode="TransportWithMessageCredential"> <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> <message clientCredentialType="Certificate" algorithmSuite="Default" /> </security> </binding> </basicHttpBinding> <customBinding> <binding name="Gateway_1"> <security authenticationMode="CertificateOverTransport" includeTimestamp="true" messageProtectionOrder="SignBeforeEncrypt"> <localClientSettings maxClockSkew="12:00:00" replayWindow="12:00:00" sessionKeyRolloverInterval="12:00:00" timestampValidityDuration="12:00:00" /> <localServiceSettings maxClockSkew="12:00:00" sessionKeyRolloverInterval="12:00:00" timestampValidityDuration="12:00:00" /> <secureConversationBootstrap /> </security> <textMessageEncoding messageVersion="Soap11" /> <sslStreamSecurity requireClientCertificate="true" /> <httpsTransport hostNameComparisonMode="WeakWildcard" /> </binding> </customBinding> <wsHttpBinding> <binding name="Gateway_1" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"> <security mode="TransportWithMessageCredential"> <message clientCredentialType="Certificate" negotiateServiceCredential="false" establishSecurityContext="true" /> </security> </binding> </wsHttpBinding> </bindings> <client> <endpoint address="https://XXX.XX.XXX.XX/SOAP" behaviorConfiguration="ClientCertificateBehavior" binding="wsHttpBinding" bindingConfiguration="Gateway_1" contract="B2BService.Gateway" name="Gateway_1_HTTPSPort"> <identity> <dns value="ext.test.com" /> </identity> </endpoint> </client> <behaviors> <endpointBehaviors> <behavior name="ClientCertificateBehavior"> <clientCredentials> <clientCertificate findValue="mycertificate.com" storeLocation="CurrentUser" storeName="Root" x509FindType="FindBySubjectName" /> <serviceCertificate> <authentication certificateValidationMode="PeerOrChainTrust" /> </serviceCertificate> </clientCredentials> </behavior> </endpointBehaviors> </behaviors> </system.serviceModel> Regardless of which config I use, the code fails for one reason or another, causing internal server errors, Error processing message for security, Undefined 'badEncoding' resource property, or expected http URI given https, and a few other! Been going round and round a bit, and I am sure it is very simple once the cofig is set :( I'm sure I've missed loads out, let me know if seeing the SOAP UI generated envelope and the currect WCF generated envelope will help. many thanks. Kam

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• How to resolve CGDirectDisplayID changing issues on newer multi-GPU Apple laptops in Core Foundation

  - by Dave Gallagher

  In Mac OS X, every display gets a unique CGDirectDisplayID number assigned to it. You can use CGGetActiveDisplayList() or [NSScreen screens] to access them, among others. Per Apple's docs: A display ID can persist across processes and system reboot, and typically remains constant as long as certain display parameters do not change. On newer mid-2010 MacBook Pro's, Apple started using auto-switching Intel/nVidia graphics. Laptops have two GPU's, a low-powered Intel, and a high-powered nVidia. Previous dual-GPU laptops (2009 models) didn't have auto-GPU switching, and required the user to make a settings change, logoff, and then logon again to make a GPU switch occur. Even older systems only had one GPU. There's an issue with the mid-2010 models where CGDirectDisplayID's don't remain the same when a display switches from one GPU to the next. For example: Laptop powers on. Built-In LCD Screen is driven by Intel chipset. Display ID: 30002 External Display is plugged in. Built-In LCD Screen switches to nVidia chipset. It's display ID changes: 30004 External Display is driven by nVidia chipset. ...at this point, the Intel chipset is dormant... User unplugs External Display. Built-In LCD Screen switches back to Intel chipset. It's display ID changes back to original: 30002 My question is, how can I match an old display ID to a new display ID when they alter due to a GPU change? Thought about: I've noticed that the display ID only changes by 2, but I don't have enough test Mac's available to determine if this is common to all new MacBook Pro's, or just mine. Kind of a kludge if "just check for display ID's which are +/-2 from one another" works, anyway. Tried: CGDisplayRegisterReconfigurationCallback(), which notifies before-and-after when displays are going to change, has no matching logic. Putting something like this inside a method registered with it doesn't work: // Run before display settings change: CGDirectDisplayID directDisplayID = ...; io_service_t servicePort = CGDisplayIOServicePort(directDisplayID); CFDictionaryRef oldInfoDict = IODisplayCreateInfoDictionary(servicePort, kIODisplayMatchingInfo); // ...display settings change... // Run after display settings change: CGDirectDisplayID directDisplayID = ...; io_service_t servicePort = CGDisplayIOServicePort(directDisplayID); CFDictionaryRef newInfoDict = IODisplayCreateInfoDictionary(servicePort, kIODisplayMatchingInfo); BOOL match = IODisplayMatchDictionaries(oldInfoDict, newInfoDict, 0); if (match) NSLog(@"Displays are a match"); else NSLog(@"Displays are not a match"); What's happening above is I'm caching oldInfoDict before display settings change, letting them change, and then comparing it to newInfoDict by using IODisplayMatchDictionaries(), which will say either "yes, both displays are the same!" or "no, both displays are not the same." Unfortunately, it does not return YES if GPU's have changed for a monitor. Example of the dictionary's it's comparing: // oldInfoDict (Display ID: 30002) oldInfoDict: { DisplayProductID = 40144; DisplayVendorID = 1552; IODisplayLocation = "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/IGPU@2/AppleIntelFramebuffer/display0/AppleBacklightDisplay"; } // newInfoDict (Display ID: 30004) newInfoDict: { DisplayProductID = 40144; DisplayVendorID = 1552; IODisplayLocation = "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/P0P2@1/IOPCI2PCIBridge/GFX0@0/NVDA,Display-A@0/NVDA/display0/AppleBacklightDisplay"; } As you can see, the IODisplayLocation key changes when GPU's are switched, hence IODisplayMatchDictionaries() doesn't work. I can, theoretically, compared just the DisplayProductID and DisplayVendorID keys, but I'm writing end-user software, and am worried of a situation where users have two or more identical monitors plugged in. Any help is greatly appreciated! :)

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• Making a non-trivial Image and Video Gallery with a really nice interface

  - by Cawas

  Short part: I'm starting to build an Image and Video Gallery for our intranet. It's pretty much like an image gallery with video thumbnails that play on click. It's just good to keep that in mind because caching and streaming happen in very different ways there. It will serve to browse our reference database, which will also contain searching, tagging and voting. There are 3 features that I need to begin with: Quick preview of thumbnails from each Gallery Fast zoom in / out Animated scrolling Now to the long part, since I can't seem to reduce this: I hope this question belongs here. Maybe people can read this through and identify with it, specially since I expect answers to be pretty specific. The first plan was getting Apple's mobile me gallery as base, because it just so happens to have all those 3 features. If you've never seem it, you should check it out. Move the mouse over each collection and you'll get a nice preview "per pixel". Carousel got a really good scrolling, not just because of the pretty effect. I like it much more than cooliris, but it would be nice to have it in several rows, maybe without the magnifying effect... Then it could be all in the same place with the zoom. The more the features blend-in together, the better. Zooming out with the mouse, scrolling by dragging, once the zoom is really out it becomes a browsing through galleries, with the quick-show preview of each, all properly cached and fast. That'd be perfect. A very compelling interface will be important in this project. Well, my point here is just describing what I need and hope to hear from people with more experience in all that stuff of what's already done and what I'd have to do myself. And how (i.e. which framework to use) to do it. To begin with, I've found a gallery demo and its source code (I think it was from here, but the link seems broken now). I guess it was made in SproutCore, which is what mobileme was based upon. Definitely with JQuery (which already seems a little slow). But I'm still missing two features there: the carousel and the fast zoom (it's just not as slow as the zoom in this demo with cappuccino). Then I've found a supposedly better one with a pretty good and similar zoom, that I'm not sure if it's using any framework and is already in php. Right now it'd be better having just the HTML, no server-side, since I'm building interface first. So, can anyone point directions? There are way too many options! Should I look for another solution closer to what I need, or try and tweak this one? I'm not familiar with any framework at all. Sorry for bringing this question that I will have to answer myself anyway sooner or later and sorry that I couldn't make this smaller. Thanks.

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• How do you stop scripters from slamming your website hundreds of times a second?

  - by davebug

  [update] I've accepted an answer, as lc deserves the bounty due to the well thought-out answer, but sadly, I believe we're stuck with our original worst case scenario: CAPTCHA everyone on purchase attempts of the crap. Short explanation: caching / web farms make it impossible for us to actually track hits, and any workaround (sending a non-cached web-beacon, writing to a unified table, etc.) slows the site down worse than the bots would. There is likely some pricey bit of hardware from Cisco or the like that can help at a high level, but it's hard to justify the cost if CAPTCHAing everyone is an alternative. I'll attempt to do a more full explanation in here later, as well as cleaning this up for future searchers (though others are welcome to try, as it's community wiki). I've added bounty to this question and attempted to explain why the current answers don't fit our needs. First, though, thanks to all of you who have thought about this, it's amazing to have this collective intelligence to help work through seemingly impossible problems. I'll be a little more clear than I was before: This is about the bag o' crap sales on woot.com. I'm the president of Woot Workshop, the subsidiary of Woot that does the design, writes the product descriptions, podcasts, blog posts, and moderates the forums. I work in the css/html world and am only barely familiar with the rest of the developer world. I work closely with the developers and have talked through all of the answers here (and many other ideas we've had). Usability of the site is a massive part of my job, and making the site exciting and fun is most of the rest of it. That's where the three goals below derive. CAPTCHA harms usability, and bots steal the fun and excitement out of our crap sales. To set up the scenario a little more, bots are slamming our front page tens of times a second screenscraping (and/or scanning our rss) for the Random Crap sale. The moment they see that, it triggers a second stage of the program that logs in, clicks I want One, fills out the form, and buys the crap. In current (2/6/2009) order of votes: lc: On stackoverflow and other sites that use this method, they're almost always dealing with authenticated (logged in) users, because the task being attempted requires that. On Woot, anonymous (non-logged) users can view our home page. In other words, the slamming bots can be non-authenticated (and essentially non-trackable except by IP address). So we're back to scanning for IPs, which a) is fairly useless in this age of cloud networking and spambot zombies and b) catches too many innocents given the number of businesses that come from one IP address (not to mention the issues with non-static IP ISPs and potential performance hits to trying to track this). Oh, and having people call us would be the worst possible scenario. Can we have them call you? BradC Ned Batchelder's methods look pretty cool, but they're pretty firmly designed to defeat bots built for a network of sites. Our problem is bots are built specifically to defeat our site. Some of these methods could likely work for a short time until the scripters evolved their bots to ignore the honeypot, screenscrape for nearby label names instead of form ids, and use a javascript-capable browser control. lc again "Unless, of course, the hype is part of you

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• Java Refuses to Start - Could not reserve enough space for object heap

  - by Randyaa

  Background We have a pool of aproximately 20 linux blades. Some are running Suse, some are running Redhat. ALL share NAS space which contains the following 3 folders: /NAS/app/java - a symlink that points to an installation of a Java JDK. Currently version 1.5.0_10 /NAS/app/lib - a symlink that points to a version of our application. /NAS/data - directory where our output is written All our machines have 2 processors (hyperthreaded) with 4gb of physical memory and 4gb of swap space. We limit the number of 'jobs' each machine can process at a given time to 6 (this number likely needs to change, but that does not enter into the current problem so please ignore it for the time being). Some of our jobs set a Max Heap size of 512mb, some others reserve a Max Heap size of 2048mb. Again, we realize we could go over our available memory if 6 jobs started on the same machine with the heap size set to 2048, but to our knowledge this has not yet occurred. The Problem Once and a while a Job will fail immediately with the following message: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. We used to chalk this up to too many jobs running at the same time on the same machine. The problem happened infrequently enough (MAYBE once a month) that we'd just restart it and everything would be fine. The problem has recently gotten much worse. All of our jobs which request a max heap size of 2048m fail immediately almost every time and need to get restarted several times before completing. We've gone out to individual machines and tried executing them manually with the same result. Debugging It turns out that the problem only exists for our SuSE boxes. The reason it has been happening more frequently is becuase we've been adding more machines, and the new ones are SuSE. 'cat /proc/version' on the SuSE boxes give us: Linux version 2.6.5-7.244-bigsmp (geeko@buildhost) (gcc version 3.3.3 (SuSE Linux)) #1 SMP Mon Dec 12 18:32:25 UTC 2005 'cat /proc/version' on the RedHat boxes give us: Linux version 2.4.21-32.0.1.ELsmp ([email protected]) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-52)) #1 SMP Tue May 17 17:52:23 EDT 2005 'uname -a' gives us the following on BOTH types of machines: UTC 2005 i686 i686 i386 GNU/Linux No jobs are running on the machine, and no other processes are utilizing much memory. All of the processes currently running might be using 100mb total. 'top' currently shows the following: Mem: 4146528k total, 3536360k used, 610168k free, 132136k buffers Swap: 4194288k total, 0k used, 4194288k free, 3283908k cached 'vmstat' currently shows the following: procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 610292 132136 3283908 0 0 0 2 26 15 0 0 100 0 If we kick off a job with the following command line (Max Heap of 1850mb) it starts fine: java/bin/java -Xmx1850M -cp helloworld.jar HelloWorld Hello World If we bump up the max heap size to 1875mb it fails: java/bin/java -Xmx1875M -cp helloworld.jar HelloWorld Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. It's quite clear that the memory currently being used is for Buffering/Caching and that's why so little is being displayed as 'free'. What isn't clear is why there is a magical 1850mb line where anything higher means Java can't start. Any explanations would be greatly appreciated.

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• Code Access Security and Sharepoint WebParts

  - by Gordon Carpenter-Thompson

  I've got a vague handle on how Code Access Security works in Sharepoint. I have developed a custom webpart and setup a CAS policy in my Manifest <CodeAccessSecurity> <PolicyItem> <PermissionSet class="NamedPermissionSet" version="1" Description="Permission set for Okana"> <IPermission class="Microsoft.SharePoint.Security.SharePointPermission, Microsoft.SharePoint.Security, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" version="1" ObjectModel="True" Impersonate="True" /> <IPermission class="SecurityPermission" version="1" Flags="Assertion, Execution, ControlThread, ControlPrincipal, RemotingConfiguration" /> <IPermission class="AspNetHostingPermission" version="1" Level="Medium" /> <IPermission class="DnsPermission" version="1" Unrestricted="true" /> <IPermission class="EventLogPermission" version="1" Unrestricted="true"> <Machine name="localhost" access="Administer" /> </IPermission> <IPermission class="EnvironmentPermission" version="1" Unrestricted="true" /> <IPermission class="System.Configuration.ConfigurationPermission, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" version="1" Unrestricted="true"/> <IPermission class="System.Net.WebPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> <IPermission class="System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" Unrestricted="true" /> <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" PathDiscovery="*AllFiles*" /> <IPermission class="IsolatedStorageFilePermission" version="1" Allowed="AssemblyIsolationByUser" UserQuota="9223372036854775807" /> <IPermission class="PrintingPermission" version="1" Level="DefaultPrinting" /> <IPermission class="PerformanceCounterPermission" version="1"> <Machine name="localhost"> <Category name="Enterprise Library Caching Counters" access="Write"/> <Category name="Enterprise Library Cryptography Counters" access="Write"/> <Category name="Enterprise Library Data Counters" access="Write"/> <Category name="Enterprise Library Exception Handling Counters" access="Write"/> <Category name="Enterprise Library Logging Counters" access="Write"/> <Category name="Enterprise Library Security Counters" access="Write"/> </Machine> </IPermission> <IPermission class="ReflectionPermission" version="1" Unrestricted="true"/> <IPermission class="SecurityPermission" version="1" Flags="SerializationFormatter, UnmanagedCode, Infrastructure, Assertion, Execution, ControlThread, ControlPrincipal, RemotingConfiguration, ControlAppDomain,ControlDomainPolicy" /> <IPermission class="SharePointPermission" version="1" ObjectModel="True" /> <IPermission class="SmtpPermission" version="1" Access="Connect" /> <IPermission class="SqlClientPermission" version="1" Unrestricted="true"/> <IPermission class="WebPartPermission" version="1" Connections="True" /> <IPermission class="WebPermission" version="1"> <ConnectAccess> <URI uri="$OriginHost$"/> </ConnectAccess> </IPermission> </PermissionSet> <Assemblies> .... </Assemblies> This is correctly converted into a wss_custom_wss_minimaltrust.config when it is deployed onto the Sharepoint server and mostly works. To get the WebPart working fully, however I find that I need to modify the wss_custom_wss_minimaltrust.config by hand after deployment and set Unrestricted="true" on the permissions set <PermissionSet class="NamedPermissionSet" version="1" Description="Permission set for MyApp" Name="mywebparts.wsp-86d8cae1-7db2-4057-8c17-dc551adb17a2-1"> to <PermissionSet class="NamedPermissionSet" version="1" Description="Permission set for MyApp" Name="mywebparts.wsp-86d8cae1-7db2-4057-8c17-dc551adb17a2-1" Unrestricted="true"> It's all because I'm loading a User Control from the webpart. I don't believe there is a way to enable that using CAS but am willing to be proven wrong. Is there a way to set something in the manifest so I don't need to make this fix by hand? Thanks

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• After resolving and calling host via ipv6 with curl, next ipv4 request fails and vice versa

  - by Ranty

  I need to request the same host with different methods (using IPv4 and IPv6) from the same script. First request is always successful (no matter IPv4 or IPv6), but the second always fails with curl error 45 (Couldn't bind to IP). I'm using the following curl config: function v4_google() { $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_FORBID_REUSE, 1); curl_setopt($ch, CURLOPT_FRESH_CONNECT, 1); curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 5.1; rv:15.0) Gecko/20100101 Firefox/15.0.1'); curl_setopt($ch, CURLOPT_URL, 'http://www.google.com/search?q=Moon'); curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4); curl_setopt($ch, CURLOPT_INTERFACE, 'My IPv4 address'); $c = curl_exec($ch); $result = !curl_errno($ch) ? 'Success' : '<b>' . curl_error($ch) . '; #' . curl_errno($ch) . '</b>'; echo '<p>v4_google:<br>Response length: ' . mb_strlen($c) . '<br>Result: ' . $result . '</p>'; curl_close($ch); } function v6_google() { $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_FORBID_REUSE, 1); curl_setopt($ch, CURLOPT_FRESH_CONNECT, 1); curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 5.1; rv:15.0) Gecko/20100101 Firefox/15.0.1'); curl_setopt($ch, CURLOPT_URL, 'http://www.google.com/search?q=Moon'); curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6); curl_setopt($ch, CURLOPT_INTERFACE, 'My IPv6 address'); $c = curl_exec($ch); $result = !curl_errno($ch) ? 'Success' : '<b>' . curl_error($ch) . '; #' . curl_errno($ch) . '</b>'; echo '<p>v6_google:<br>Response length: ' . mb_strlen($c) . '<br>Result: ' . $result . '</p>'; curl_close($ch); } v6_google(); v4_google(); So long story short, if I query v6_google(); first, then all consecutive calls of v4_google(); are failing with the curl error 45 (Couldn't bind to IP). And vice versa. As you can see, I separated code into different functions and added CURLOPT_FORBID_REUSE and CURLOPT_FRESH_CONNECT plus curl_close($ch), but it didn't help at all. It looks like curl is caching the resolving method of every host you request, and even if you specify another resolving method the next time you call that host, the cached one is used instead. I would appreciate any help with this issue.

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• Random Complete System Unresponsiveness Running Mathematical Functions

  - by Computer Guru

  I have a program that loads a file (anywhere from 10MB to 5GB) a chunk at a time (ReadFile), and for each chunk performs a set of mathematical operations (basically calculates the hash). After calculating the hash, it stores info about the chunk in an STL map (basically <chunkID, hash>) and then writes the chunk itself to another file (WriteFile). That's all it does. This program will cause certain PCs to choke and die. The mouse begins to stutter, the task manager takes 2 min to show, ctrl+alt+del is unresponsive, running programs are slow.... the works. I've done literally everything I can think of to optimize the program, and have triple-checked all objects. What I've done: Tried different (less intensive) hashing algorithms. Switched all allocations to nedmalloc instead of the default new operator Switched from stl::map to unordered_set, found the performance to still be abysmal, so I switched again to Google's dense_hash_map. Converted all objects to store pointers to objects instead of the objects themselves. Caching all Read and Write operations. Instead of reading a 16k chunk of the file and performing the math on it, I read 4MB into a buffer and read 16k chunks from there instead. Same for all write operations - they are coalesced into 4MB blocks before being written to disk. Run extensive profiling with Visual Studio 2010, AMD Code Analyst, and perfmon. Set the thread priority to THREAD_MODE_BACKGROUND_BEGIN Set the thread priority to THREAD_PRIORITY_IDLE Added a Sleep(100) call after every loop. Even after all this, the application still results in a system-wide hang on certain machines under certain circumstances. Perfmon and Process Explorer show minimal CPU usage (with the sleep), no constant reads/writes from disk, few hard pagefaults (and only ~30k pagefaults in the lifetime of the application on a 5GB input file), little virtual memory (never more than 150MB), no leaked handles, no memory leaks. The machines I've tested it on run Windows XP - Windows 7, x86 and x64 versions included. None have less than 2GB RAM, though the problem is always exacerbated under lower memory conditions. I'm at a loss as to what to do next. I don't know what's causing it - I'm torn between CPU or Memory as the culprit. CPU because without the sleep and under different thread priorities the system performances changes noticeably. Memory because there's a huge difference in how often the issue occurs when using unordered_set vs Google's dense_hash_map. What's really weird? Obviously, the NT kernel design is supposed to prevent this sort of behavior from ever occurring (a user-mode application driving the system to this sort of extreme poor performance!?)..... but when I compile the code and run it on OS X or Linux (it's fairly standard C++ throughout) it performs excellently even on poor machines with little RAM and weaker CPUs. What am I supposed to do next? How do I know what the hell it is that Windows is doing behind the scenes that's killing system performance, when all the indicators are that the application itself isn't doing anything extreme? Any advice would be most welcome.

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• How do I get through proxy server environments for non-standard services?

  - by Ripred

  I'm not real hip on exactly what role(s) today's proxy servers can play and I'm learning so go easy on me :-) I have a client/server system I have written using a homegrown protocol and need to enhance the client side to negotiate its way out of a proxy environment. I have an existing client and server system written in C and C++ for the speed and a small amount of MFC in the client to handle the user interface. I have written both the server and client side of the system on Windows (the people I work for are mainly web developers using Windows everything - not a choice) sticking to Berkeley Sockets as it were via wsock32 for efficiency. The clients connect to the server through a nonstandard port (even though using port 80 is an option to get out of some environments but the protocol that goes over it isn't HTTP). The TCP connection(s) stay open for the duration of the clients participation in real time conferences. Our customer base is expanding to all kinds of networked environments. I have been able to solve a lot of problems by adding the ability to connect securely over port 443 and using secure sockets which allows the protocol to pass through a lot environments since the internal packets can't be sniffed. But more and more of our customers are behind a proxy server environment and my direct connections don't make it through. My old school understanding of proxy servers is that they act as a proxy for external HTML content over HTTP, possibly locally caching popular material for faster local access, and also allowing their IT staff to blacklist certain destination sites. Customer are complaining that my software doesn't recognize and easily navigate its way through their proxy environments but I'm finding it difficult to decide what my "best fit" solution should be. My software doesn't tear down the connection after each client request, and on top of that packets can come from either side at any time, basically your typical custom client/server system for a specific niche. My first reaction is "why can't they just add my servers addresses to their white list" but if there is a programmatic way I can get through without requiring their IT staff to help it is politically better and arguably a better solution anyway. Plus maybe I'm still not understanding the role and purpose of what proxy servers and environments have grown to be these days. My first attempt at a solution was to use WinInet with its various proxy capabilities to establish a connection over port 80 to my non-standard protocol server (which knows enough to recognize and answer a simple HTTP-looking GET request and answer it with a simple HTTP response page to get around some environments that employ initial packet sniffing (DPI)). I retrieved the actual SOCKET handle behind WinInet's HINTERNET request object and had hoped to use that in place of my software's existing SOCKET connection and hopefully not need to change much more on the client side. It initially seemed to be my solution but on further inspection it seems that the OS gets first-chance at the received data on this socket since when I get notified of events via the standard select(...) statement on the socket and query the size of the data available via ioctlsocket the call succeeds but returns 0 bytes available, the reads don't work and it goes downhill from there. Can someone tell me of a client-side library (commercial is fine) will let me get past these proxy server environments with as little user and IT staff help as possible? From what I read it has grown past SOCKS and I figure someone has to have solved this problem before me. Thanks for reading my long-winded question, Ripred

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• segmented controls mangled during initial transition animation

  - by dLux

  greetings and salutations folks, i'm relatively new to objective c & iphone programming, so bare with me if i've overlooked something obvious.. i created a simple app to play with the different transition animations, setting up a couple segmented controls and a slider.. (Flip/Curl), (left/right) | (up/down), (EaseInOut/EaseIn/EaseOut/Linear) i created a view controller class, and the super view controller switches between 2 instances of the sub class. as you can see from the following image, the first time switching to the 2nd instance, while the animation is occurring the segmented controls are mangled; i'd guess they haven't had enuff time to draw themselves completely.. http://img689.imageshack.us/img689/2320/mangledbuttonsduringtra.png they're fine once the animation is done, and any subsequent times.. if i specify cache:NO in the setAnimationTransition it helps, but there still seems to be some sort of progressive reveal for the text in the segmented controls; they still don't seem to be pre-rendered or initialized properly.. (and surely there's a way to do this while caching the view being transitioned to, since in this case the view isn't changing and should be cacheable.) i'm building my code based on a couple tutorials from a book, so i updated the didReceiveMemoryWarning to set the instanced view controllers to nil; when i invoke a memory warning in the simulator, i assume it's purging the other view, and it acts like a first transition after loading, the view being transitioned to appears just like the image above.. i guess it can't hurt to include the code (sorry if it's considered spamming), this is basically half of it, with a similar chunk following this in an else statement, for the case of the 2nd side being present, switching back to the 1st..: - (IBAction)switchViews:(id)sender { [UIView beginAnimations:@"Transition Animation" context:nil]; if (self.sideBViewController.view.superview == nil) // sideA is active, sideB is coming { if (self.sideBViewController == nil) { SideAViewController *sBController = [[SideAViewController alloc] initWithNibName:@"SideAViewController" bundle:nil]; self.sideBViewController = sBController; [sBController release]; } [UIView setAnimationDuration:sideAViewController.transitionDurationSlider.value]; if ([sideAViewController.transitionAnimation selectedSegmentIndex] == 0) { // flip: 0 == left, 1 == right if ([sideAViewController.flipDirection selectedSegmentIndex] == 0) [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.view cache:YES]; else [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES]; } else { // curl: 0 == up, 1 == down if ([sideAViewController.curlDirection selectedSegmentIndex] == 0) [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:YES]; else [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES]; } if ([sideAViewController.animationCurve selectedSegmentIndex] == 0) [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; else if ([sideAViewController.animationCurve selectedSegmentIndex] == 1) [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; else if ([sideAViewController.animationCurve selectedSegmentIndex] == 2) [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; else if ([sideAViewController.animationCurve selectedSegmentIndex] == 3) [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [sideBViewController viewWillAppear:YES]; [sideAViewController viewWillDisappear:YES]; [sideAViewController.view removeFromSuperview]; [self.view insertSubview:sideBViewController.view atIndex:0]; [sideBViewController viewDidAppear:YES]; [sideAViewController viewDidDisappear:YES]; } any other tips or pointers about writing good clean code is also appreciated, i realize i still have a lot to learn.. thank u for ur time, -- d

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