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• OpenVPN and PPTP on XEN VPS

  - by amiv

  I have Debian based system (Ubuntu 11.10) on XEN VPS. I've installed OpenVPN and works great. I need to install PPTP too, so did it and clients can connect, but they have no internet on client side. If I connect to VPN over PPTP I can ping and access to only my VPS by its IP, but ony that. There's no "internet" on client side. It looks it's not DNS problems (I'm using 8.8.8.8) because I can't ping known IPs. I bet the solution is simple, but don't have any idea. Any guess? /etc/pptpd.conf option /etc/ppp/pptpd-options logwtmp localip 46.38.xx.xx remoteip 10.1.0.1-10 /etc/ppp/pptpd-options name pptpd refuse-pap refuse-chap refuse-mschap require-mschap-v2 require-mppe-128 ms-dns 8.8.8.8 ms-dns 8.8.4.4 proxyarp nodefaultroute lock nobsdcomp /etc/ppp/ip-up [...] ifconfig ppp0 mtu 1400 /etc/sysctl.conf [...] net.ipv4.ip_forward=1 Command which I run: iptables -t nat -A POSTROUTING -j SNAT --to-source 46.38.xx.xx (IP of my VPS) The client can connect, first one gets IP 10.1.0.1 and DNS from Google. I bet it's iptables problem, am I right? I'm iptables noob and I don't have idea what's wrong. And here's the ifconfig and route command before client connect via PPTP: root@vps3780:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default xx.xx.tel.ru 0.0.0.0 UG 100 0 0 eth0 10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0 10.8.0.2 * 255.255.255.255 UH 0 0 0 tun0 46.38.xx.0 * 255.255.255.0 U 0 0 0 eth0 root@vps3780:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:16:3e:56:xx:xx inet addr:46.38.xx.xx Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::216:xx:xx:dfb6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:22671 errors:0 dropped:81 overruns:0 frame:0 TX packets:2266 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1813358 (1.8 MB) TX bytes:667626 (667.6 KB) Interrupt:24 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:100 errors:0 dropped:0 overruns:0 frame:0 TX packets:100 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:10778 (10.7 KB) TX bytes:10778 (10.7 KB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:602 errors:0 dropped:0 overruns:0 frame:0 TX packets:612 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:90850 (90.8 KB) TX bytes:418904 (418.9 KB) And here's the ifconfig and route command after client connect via PPTP: root@vps3780:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default xx.xx.tel.ru 0.0.0.0 UG 100 0 0 eth0 10.1.0.1 * 255.255.255.255 UH 0 0 0 ppp0 10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0 10.8.0.2 * 255.255.255.255 UH 0 0 0 tun0 46.38.xx.0 * 255.255.255.0 U 0 0 0 eth0 root@vps3780:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:16:3e:56:xx:xx inet addr:46.38.xx.xx Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::216:xx:xx:dfb6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:22989 errors:0 dropped:82 overruns:0 frame:0 TX packets:2352 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1841310 (1.8 MB) TX bytes:678456 (678.4 KB) Interrupt:24 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:112 errors:0 dropped:0 overruns:0 frame:0 TX packets:112 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:12102 (12.1 KB) TX bytes:12102 (12.1 KB) ppp0 Link encap:Point-to-Point Protocol inet addr:46.38.xx.xx P-t-P:10.1.0.1 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1400 Metric:1 RX packets:66 errors:0 dropped:0 overruns:0 frame:0 TX packets:15 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:10028 (10.0 KB) TX bytes:660 (660.0 B) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:602 errors:0 dropped:0 overruns:0 frame:0 TX packets:612 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:90850 (90.8 KB) TX bytes:418904 (418.9 KB) And ugly iptables --list output: root@vps3780:~# iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- 10.8.0.0/24 anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- 10.1.0.0/24 anywhere ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- 10.1.0.0/24 anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- 10.8.0.0/24 anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable And ugly iptables -t nat -L output: root@vps3780:~# iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination Chain INPUT (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination SNAT all -- 10.8.0.0/24 anywhere to:46.38.xx.xx MASQUERADE all -- 10.1.0.0/24 anywhere SNAT all -- 10.1.0.0/24 anywhere to:46.38.xx.xx SNAT all -- 10.8.0.0/24 anywhere to:46.38.xx.xx SNAT all -- 10.1.0.0/24 anywhere to:46.38.xx.xx MASQUERADE all -- anywhere anywhere SNAT all -- anywhere anywhere to:46.38.xx.xx SNAT all -- 10.8.0.0/24 anywhere to:46.38.xx.xx MASQUERADE all -- anywhere anywhere MASQUERADE all -- 10.1.0.0/24 anywhere MASQUERADE all -- anywhere anywhere MASQUERADE all -- 10.1.0.0/24 anywhere As I said - OpenVPN works very good. 10.8.0.0/24 for OpenVPN (on tun0). PPTP won't work. 10.1.0.0/24 for PPTP (on ppp0). Clients can connect, but they haven't "internet". Any suggestions will be appreciated. Second whole day fighting with no results. EDIT: iptables -t filter -F - it resolved my problem :-)

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• How can a single disk in a hardware SATA RAID-10 array bring the entire array to a screeching halt?

  - by Stu Thompson

  Prelude: I'm a code-monkey that's increasingly taken on SysAdmin duties for my small company. My code is our product, and increasingly we provide the same app as SaaS. About 18 months ago I moved our servers from a premium hosting centric vendor to a barebones rack pusher in a tier IV data center. (Literally across the street.) This ment doing much more ourselves--things like networking, storage and monitoring. As part the big move, to replace our leased direct attached storage from the hosting company, I built a 9TB two-node NAS based on SuperMicro chassises, 3ware RAID cards, Ubuntu 10.04, two dozen SATA disks, DRBD and . It's all lovingly documented in three blog posts: Building up & testing a new 9TB SATA RAID10 NFSv4 NAS: Part I, Part II and Part III. We also setup a Cacit monitoring system. Recently we've been adding more and more data points, like SMART values. I could not have done all this without the awesome boffins at ServerFault. It's been a fun and educational experience. My boss is happy (we saved bucket loads of $$$), our customers are happy (storage costs are down), I'm happy (fun, fun, fun). Until yesterday. Outage & Recovery: Some time after lunch we started getting reports of sluggish performance from our application, an on-demand streaming media CMS. About the same time our Cacti monitoring system sent a blizzard of emails. One of the more telling alerts was a graph of iostat await. Performance became so degraded that Pingdom began sending "server down" notifications. The overall load was moderate, there was not traffic spike. After logging onto the application servers, NFS clients of the NAS, I confirmed that just about everything was experiencing highly intermittent and insanely long IO wait times. And once I hopped onto the primary NAS node itself, the same delays were evident when trying to navigate the problem array's file system. Time to fail over, that went well. Within 20 minuts everything was confirmed to be back up and running perfectly. Post-Mortem: After any and all system failures I perform a post-mortem to determine the cause of the failure. First thing I did was ssh back into the box and start reviewing logs. It was offline, completely. Time for a trip to the data center. Hardware reset, backup an and running. In /var/syslog I found this scary looking entry: Nov 15 06:49:44 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_00], 6 Currently unreadable (pending) sectors Nov 15 06:49:44 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_07], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 171 to 170 Nov 15 06:49:45 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_10], 16 Currently unreadable (pending) sectors Nov 15 06:49:45 umbilo smartd[2827]: Device: /dev/twa0 [3ware_disk_10], 4 Offline uncorrectable sectors Nov 15 06:49:45 umbilo smartd[2827]: Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error Nov 15 06:49:45 umbilo smartd[2827]: # 1 Short offline Completed: read failure 90% 6576 3421766910 Nov 15 06:49:45 umbilo smartd[2827]: # 2 Short offline Completed: read failure 90% 6087 3421766910 Nov 15 06:49:45 umbilo smartd[2827]: # 3 Short offline Completed: read failure 10% 5901 656821791 Nov 15 06:49:45 umbilo smartd[2827]: # 4 Short offline Completed: read failure 90% 5818 651637856 Nov 15 06:49:45 umbilo smartd[2827]: So I went to check the Cacti graphs for the disks in the array. Here we see that, yes, disk 7 is slipping away just like syslog says it is. But we also see that disk 8's SMART Read Erros are fluctuating. There are no messages about disk 8 in syslog. More interesting is that the fluctuating values for disk 8 directly correlate to the high IO wait times! My interpretation is that: Disk 8 is experiencing an odd hardware fault that results in intermittent long operation times. Somehow this fault condition on the disk is locking up the entire array Maybe there is a more accurate or correct description, but the net result has been that the one disk is impacting the performance of the whole array. The Question(s) How can a single disk in a hardware SATA RAID-10 array bring the entire array to a screeching halt? Am I being naïve to think that the RAID card should have dealt with this? How can I prevent a single misbehaving disk from impacting the entire array? Am I missing something?

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• OpenVPN Configuration - Windows 7 client & debian server

  - by Guillaume

  I recently formatted my Windows 7 computer and lost my client's config files for OpenVPN. I recovered the certificates and default config that were left on the server but I haven't managed to make the whole thing work again. I assume the server's config and routing table are OK because it was working before (although quite some time ago). Would any of you experts be able to help? server.conf # Serveur TCP/666 mode server proto udp port 666 dev tun # Cles et certificats ca ca.crt cert server.crt key server.key dh dh1024.pem tls-auth ta.key 0 cipher AES-256-CBC # Reseau server 10.8.0.0 255.255.255.0 #push "redirect-gateway def1 bypass-dhcp" push "dhcp-option DNS 208.67.222.222" push "dhcp-option DNS 208.67.220.220" push "redirect-gateway def1" keepalive 10 120 # Securite user nobody group nogroup chroot /etc/openvpn/jail persist-key persist-tun comp-lzo # Log verb 3 mute 20 status openvpn-status.log log-append /var/log/openvpn.log client.conf # Client client dev tun proto udp remote *my server's ip address*:666 cipher AES-256-CBC # Cles ca ca.crt cert client1.crt key client1.key tls-auth ta.key 1 # Securite nobind persist-key persist-tun comp-lzo verb 3 Routing table on debian server when OpenVPN server is running: Destination Gateway Genmask Indic Metric Ref Use Iface 10.8.0.2 * 255.255.255.255 UH 0 0 0 tun0 10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0 my server's ip * 255.255.255.0 U 0 0 0 eth0 default 72815.trg.dedic 0.0.0.0 UG 0 0 0 eth0 Routing table on Windows 7 client (OpenVPN not working) =========================================================================== Interface List 19...00 f0 8a 1b 6e 5c ......TAP-Win32 Adapter V9 12...90 2e 34 33 84 7b ......Atheros AR8151 PCI-E Gigabit Ethernet Controller ( NDIS 6.20) 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 13...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface 16...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.11 20 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 192.168.1.0 255.255.255.0 On-link 192.168.1.11 276 192.168.1.11 255.255.255.255 On-link 192.168.1.11 276 192.168.1.255 255.255.255.255 On-link 192.168.1.11 276 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 192.168.1.11 276 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 192.168.1.11 276 =========================================================================== Persistent Routes: None IPv6 Route Table =========================================================================== Active Routes: [...] =========================================================================== Persistent Routes: None And when the link is established between my client and the server: The server's routing table stays the same. The client's becomes: =========================================================================== Interface List 19...00 f0 8a 1b 6e 5c ......TAP-Win32 Adapter V9 12...90 2e 34 33 84 7b ......Atheros AR8151 PCI-E Gigabit Ethernet Controller ( NDIS 6.20) 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 13...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface 16...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.11 20 0.0.0.0 128.0.0.0 10.8.0.5 10.8.0.6 30 10.8.0.1 255.255.255.255 10.8.0.5 10.8.0.6 30 10.8.0.4 255.255.255.252 On-link 10.8.0.6 286 10.8.0.6 255.255.255.255 On-link 10.8.0.6 286 10.8.0.7 255.255.255.255 On-link 10.8.0.6 286 my server's ip 255.255.255.255 192.168.1.1 192.168.1.11 20 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 128.0.0.0 128.0.0.0 10.8.0.5 10.8.0.6 30 192.168.1.0 255.255.255.0 On-link 192.168.1.11 276 192.168.1.11 255.255.255.255 On-link 192.168.1.11 276 192.168.1.255 255.255.255.255 On-link 192.168.1.11 276 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 192.168.1.11 276 224.0.0.0 240.0.0.0 On-link 10.8.0.6 286 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 192.168.1.11 276 255.255.255.255 255.255.255.255 On-link 10.8.0.6 286 =========================================================================== Persistent Routes: None What's working: Server and client do connect to each other, SSL certificates are OK. The client gets an IP (10.8.0.6) from the server OpenVPN client is started as an administrator. But: I cannot ping the other one on either side. 'Gateway' value is empty on client's side (in the adapter's "status" window). Client has got no internet access when the link is up. Ideal configuration: I only want the client to be able to use the server's Internet access and access its resources (MySQL server in particular). I do not need or want the server to access the client's local network. The client needs to be able to access it's local network, although all Internet traffic should be redirected to the VPN link. I spent a considerable amount of time on this but it's still not working, any help would be much appreciated. Thanks :)

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• CSC folder data access AND roaming profiles issues (Vista with Server 2003, then 2008)

  - by Alex Jones

  I'm a junior sysadmin for an IT contractor that helps small, local government agencies, like little towns and the like. One of our clients, a public library with ~ 50 staff users, was recently migrated from Server 2003 Standard to Server 2008 R2 Standard in a very short timeframe; our senior employee, the only network engineer, had suddenly put in his two weeks notice, so management pushed him to do this project before quitting. A bit hasty on management's part? Perhaps. Could we do anything about that? Nope. Do I have to fix this all by myself? Pretty much. The network is set up like this: a) 50ish staff workstations, all running Vista Business SP2. All staff use MS Outlook, which uses RPC-over-HTTPS ("Outlook Anywhere") for cached Exchange access to an offsite location. b) One new (virtualized) Server 2008 R2 Standard instance, running atop a Server 2008 R2 host via Hyper-V. The VM is the domain's DC, and also the site's one and only file server. Let's call that VM "NEWBOX". c) One old physical Server 2003 Standard server, running the same roles. Let's call it "OLDBOX". It's still on the network and accessible, but it's been demoted, and its shares have been disabled. No data has been deleted. c) Gigabit Ethernet everywhere. The organization's only has one domain, and it did not change during the migration. d) Most users were set up for a combo of redirected folders + offline files, but some older employees who had been with the organization a long time are still on roaming profiles. To sum up: the servers in question handle user accounts and files, nothing else (eg, no TS, no mail, no IIS, etc.) I have two major problems I'm hoping you can help me with: 1) Even though all domain users have had their redirected folders moved to the new server, and loggin in to their workstations and testing confirms that the Documents/Music/Whatever folders point to the new paths, it appears some users (not laptops or anything either!) had been working offline from OLDBOX for a long time, and nobody realized it. Here's the ugly implication: a bunch of their data now lives only in their CSC folders, because they can't access the share on OLDBOX and sync with it finally. How do I get this data out of those CSC folders, and onto NEWBOX? 2) What's the best way to migrate roaming profile users to non-roaming ones, without losing vital data like documents, any lingering PSTs, etc? Things I've thought about trying: For problem 1: a) Reenable the documents share on OLDBOX, force an Offline Files sync for ALL domain users, then copy OLDBOX's share's data to the equivalent share on NEWBOX. Reinitialize the Offline Files cache for every user. With this: How do I safely force a domain-wide Offline Files sync? Could I lose data by reenabling the share on OLDBOX and forcing the sync? Afterwards, how can I reinitialize the Offline Files cache for every user, without doing it manually, workstation by workstation? b) Determine which users have unsynced changes to OLDBOX (again, how?), search each user's CSC folder domain-wide via workstation admin shares, and grab the unsynched data. Reinitialize the Offline Files cache for every user. With this: How can I detect which users have unsynched changes with a script? How can I search each user's CSC folder, when the ownership and permissions set for CSC folders are so restrictive? Again, afterwards, how can I reinitialize the Offline Files cache for every user, without doing it manually, workstation by workstation? c) Manually visit each workstation, copy the contents of the CSC folder, and manually copy that data onto NEWBOX. Reinitialize the Offline Files cache for every user. With this: Again, how do I 'break into' the CSC folder and get to its data? As an experiment, I took one workstation's HD offsite, imaged it for safety, and then tried the following with one of our shop PCs, after attaching the drive: grant myself full control of the folder (failed), grant myself ownership of the folder (failed), run chkdsk on the whole drive to make sure nothing's messed up (all OK), try to take full control of the entire drive (failed), try to take ownership of the entire drive (failed) MS KB articles and Googling around suggests there's a utility called CSCCMD that's meant for this exact scenario...but it looks like it's available for XP, not Vista, no? Again, afterwards, how can I reinitialize the Offline Files cache for every user, without doing it manually, workstation by workstation? For problem 2: a) Figure out which users are on roaming profiles, and where their profiles 'live' on the server. Create new folders for them in the redirected folders repository, migrate existing data, and disable the roaming. With this: Finding out who's roaming isn't hard. But what's the best way to disable the roaming itself? In AD Users and Computers, or on each user's workstation? Doing it centrally on the server seems more efficient; that said, all of the KB research I've done turns up articles on how to go from local to roaming, not the other way around, so I don't have good documentation on this. In closing: we have good backups of NEWBOX and OLDBOX, but not of the workstations themselves, so anything drastic on the client side would need imaging and testing for safety. Thanks for reading along this far! Hopefully you can help me dig us out of this mess.

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• Server HTTP Load times slow?

  - by cdog5000

  Hello, My server @ codemeh.com (HTTP Server) seems to be randomly loading slowly, I cannot tell if it just my forums (http://www.codemeh.com/forums/) that are loading slowly or if the WHOLE site is just loading slowly since my forums are the largest thing on the site right now. load average: 0.02, 0.17, 0.20 That is super low to my knowledge. I have tried Google Page Analytic plug-in for FireFox to solve the problem but nothing comes up that is VERY bad. If someone could investigate this for me since I am very new at apache and server configurations. Thanks! (top): PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7493 www-data 15 0 98.2m 16m 9092 S 3 0.8 0:27.24 apache2 26429 www-data 15 0 98.2m 15m 7392 S 3 0.7 0:03.45 apache2 26477 www-data 17 0 98.2m 15m 7396 S 3 0.7 0:03.16 apache2 1 root 15 0 2468 1384 1156 S 0 0.1 0:00.49 init 1367 root 25 0 2564 816 660 S 0 0.0 0:00.00 xinetd 1526 root 15 0 29576 5420 1976 S 0 0.3 1:02.69 fail2ban-server 3703 root 15 0 13512 9312 1696 S 0 0.4 0:11.59 miniserv.pl 3915 postfix 15 0 6056 1652 1320 S 0 0.1 0:00.00 pickup 4010 root 15 0 4548 1296 972 S 0 0.1 0:37.36 ntpd 7448 root 15 0 98528 26m 20m S 0 1.3 0:00.27 apache2 7454 www-data 18 0 33580 2616 368 S 0 0.1 0:00.04 apache2 7528 www-data 18 0 108m 24m 15m S 0 1.2 0:27.60 apache2 7974 root 16 0 8700 2728 2164 S 0 0.1 0:00.08 sshd 8123 cdog5000 15 0 8832 1596 896 S 0 0.1 0:00.00 sshd 8126 cdog5000 18 0 4484 1716 1384 S 0 0.1 0:00.00 bash 8141 cdog5000 15 0 2344 980 796 R 0 0.0 0:00.11 top 13461 root 15 0 8700 2728 2164 S 0 0.1 0:00.07 sshd 13567 cdog5000 18 0 8832 1492 896 S 0 0.1 0:00.33 sshd 13569 cdog5000 18 0 4484 1728 1388 S 0 0.1 0:00.09 bash 17983 root 15 0 4392 1268 988 S 0 0.1 0:00.00 su 17987 root 15 0 4516 1752 1380 S 0 0.1 0:00.09 bash 18081 www-data 15 0 98.2m 14m 6588 S 0 0.7 0:04.91 apache2 20000 www-data 15 0 98.3m 15m 8040 S 0 0.8 0:02.45 apache2 20019 www-data 15 0 98.2m 14m 6808 S 0 0.7 0:04.97 apache2 30343 root 15 0 3964 1012 764 S 0 0.0 0:00.03 vsftpd 30382 root 15 0 2304 908 716 S 0 0.0 0:00.62 cron 30401 mysql 17 0 141m 17m 5416 S 0 0.9 1:02.20 mysqld 30424 root 15 0 5472 912 504 S 0 0.0 0:00.04 sshd 30473 syslog 15 0 1916 676 536 S 0 0.0 0:01.02 syslogd 30611 amavis 15 0 33872 25m 2292 S 0 1.2 0:03.11 amavisd-new 31890 amavis 18 0 34888 24m 1792 S 0 1.2 0:00.00 amavisd-new 31891 amavis 18 0 34888 24m 1784 S 0 1.2 0:00.00 amavisd-new 32397 clamav 18 0 104m 84m 1272 S 0 4.1 1:06.46 clamd 32563 clamav 15 0 12832 5716 4440 S 0 0.3 0:01.29 freshclam 32573 root 23 0 1892 456 372 S 0 0.0 0:00.00 courierlogger 32575 root 18 0 2096 684 544 S 0 0.0 0:00.01 authdaemond 32583 root 23 0 1892 360 284 S 0 0.0 0:00.00 courierlogger 32584 root 24 0 2000 612 516 S 0 0.0 0:00.00 couriertcpd 32598 root 23 0 1892 360 284 S 0 0.0 0:00.00 courierlogger 32599 root 25 0 2000 612 516 S 0 0.0 0:00.00 couriertcpd 32604 root 18 0 1892 460 372 S 0 0.0 0:00.00 courierlogger 32605 root 18 0 2000 624 532 S 0 0.0 0:00.00 couriertcpd 32607 root 18 0 2308 404 256 S 0 0.0 0:00.02 authdaemond 32608 root 18 0 2096 260 116 S 0 0.0 0:00.03 authdaemond 32609 root 15 0 2308 404 256 S 0 0.0 0:00.03 authdaemond 32610 root 18 0 2096 260 116 S 0 0.0 0:00.02 authdaemond 32612 root 18 0 2308 404 256 S 0 0.0 0:00.02 authdaemond 32621 root 24 0 1892 364 284 S 0 0.0 0:00.00 courierlogger 32622 root 25 0 2000 608 516 S 0 0.0 0:00.00 couriertcpd 32633 root 15 0 105m 936 716 S 0 0.0 0:02.26 nscd 32719 root 16 0 6252 1680 1344 S 0 0.1 0:01.24 master 32738 postfix 15 0 6188 1776 1400 S 0 0.1 0:00.44 qmgr 32758 postfix 15 0 6492 2564 1788 S 0 0.1 0:00.14 tlsmgr (/etc/apache2/sites-available/default): NameVirtualHost * <VirtualHost *> ServerAdmin webmaster@localhost DocumentRoot /var/www/web1/web/ <Directory /var/www/web1/web/> Options Indexes MultiViews AllowOverride None Order allow,deny allow from all </Directory> </VirtualHost> I have fail2ban server and I dont have any firewall at this point and time that I know of. SMF is 2.0 RC4 and apache version is 2.2.14. I run a MySQL server on another box in the same DC (Persistent Connection). I installed eAccelerator today and it didnt help.

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• e2fsck extremly slow, although enough memory exists

  - by kaefert

  I've got this external USB-Disk: kaefert@blechmobil:~$ lsusb -s 2:3 Bus 002 Device 003: ID 0bc2:3320 Seagate RSS LLC As can be seen in this dmesg output, there are some problems that prevents that disk from beeing mounted: kaefert@blechmobil:~$ dmesg | grep sdb [ 114.474342] sd 5:0:0:0: [sdb] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB) [ 114.475089] sd 5:0:0:0: [sdb] Write Protect is off [ 114.475092] sd 5:0:0:0: [sdb] Mode Sense: 43 00 00 00 [ 114.475959] sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 114.477093] sd 5:0:0:0: [sdb] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB) [ 114.501649] sdb: sdb1 [ 114.502717] sd 5:0:0:0: [sdb] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB) [ 114.504354] sd 5:0:0:0: [sdb] Attached SCSI disk [ 116.804408] EXT4-fs (sdb1): ext4_check_descriptors: Checksum for group 3976 failed (47397!=61519) [ 116.804413] EXT4-fs (sdb1): group descriptors corrupted! So I went and fired up my favorite partition manager - gparted, and told it to verify and repair the partition sdb1. This made gparted call e2fsck (version 1.42.4 (12-Jun-2012)) e2fsck -f -y -v /dev/sdb1 Although gparted called e2fsck with the "-v" option, sadly it doesn't show me the output of my e2fsck process (bugreport https://bugzilla.gnome.org/show_bug.cgi?id=467925 ) I started this whole thing on Sunday (2012-11-04_2200) evening, so about 48 hours ago, this is what htop says about it now (2012-11-06-1900): PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 3704 root 39 19 1560M 1166M 768 R 98.0 19.5 42h56:43 e2fsck -f -y -v /dev/sdb1 Now I found a few posts on the internet that discuss e2fsck running slow, for example: http://gparted-forum.surf4.info/viewtopic.php?id=13613 where they write that its a good idea to see if the disk is just that slow because maybe its damaged, and I think these outputs tell me that this is not the case in my case: kaefert@blechmobil:~$ sudo hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 3562 MB in 2.00 seconds = 1783.29 MB/sec Timing buffered disk reads: 82 MB in 3.01 seconds = 27.26 MB/sec kaefert@blechmobil:~$ sudo hdparm /dev/sdb /dev/sdb: multcount = 0 (off) readonly = 0 (off) readahead = 256 (on) geometry = 364801/255/63, sectors = 5860533160, start = 0 However, although I can read quickly from that disk, this disk speed doesn't seem to be used by e2fsck, considering tools like gkrellm or iotop or this: kaefert@blechmobil:~$ iostat -x Linux 3.2.0-2-amd64 (blechmobil) 2012-11-06 _x86_64_ (2 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 14,24 47,81 14,63 0,95 0,00 22,37 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 0,59 8,29 2,42 5,14 43,17 160,17 53,75 0,30 39,80 8,72 54,42 3,95 2,99 sdb 137,54 5,48 9,23 0,20 587,07 22,73 129,35 0,07 7,70 7,51 16,18 2,17 2,04 Now I researched a little bit on how to find out what e2fsck is doing with all that processor time, and I found the tool strace, which gives me this: kaefert@blechmobil:~$ sudo strace -p3704 lseek(4, 41026998272, SEEK_SET) = 41026998272 write(4, "\212\354K[_\361\3nl\212\245\352\255jR\303\354\312Yv\334p\253r\217\265\3567\325\257\3766"..., 4096) = 4096 lseek(4, 48404766720, SEEK_SET) = 48404766720 read(4, "\7t\260\366\346\337\304\210\33\267j\35\377'\31f\372\252\ffU\317.y\211\360\36\240c\30`\34"..., 4096) = 4096 lseek(4, 41027002368, SEEK_SET) = 41027002368 write(4, "\232]7Ws\321\352\t\1@[+5\263\334\276{\343zZx\352\21\316`1\271[\202\350R`"..., 4096) = 4096 lseek(4, 48404770816, SEEK_SET) = 48404770816 read(4, "\17\362r\230\327\25\346//\210H\v\311\3237\323K\304\306\361a\223\311\324\272?\213\tq \370\24"..., 4096) = 4096 lseek(4, 41027006464, SEEK_SET) = 41027006464 write(4, "\367yy>x\216?=\324Z\305\351\376&\25\244\210\271\22\306}\276\237\370(\214\205G\262\360\257#"..., 4096) = 4096 lseek(4, 48404774912, SEEK_SET) = 48404774912 read(4, "\365\25\0\21|T\0\21}3t_\272\373\222k\r\177\303\1\201\261\221$\261B\232\3142\21U\316"..., 4096) = 4096 ^CProcess 3704 detached around 16 of these lines every second, so 4 read and 4 write operations every second, which I don't consider to be a lot.. And finally, my question: Will this process ever finish? If those numbers from fseek (48404774912) represent bytes, that would be something like 45 gigabytes, with this beeing a 3 terrabyte disk, which would give me 134 days to go, if the speed stays constant, and he scans the disk like this completly and only once. Do you have some advice for me? I have most of the data on that disk elsewhere, but I've put a lot of hours into sorting and merging it to this disk, so I would prefer to getting this disk up and running again, without formatting it anew. I don't think that the hardware is damaged since the disk is only a few months and since I can't see any I/O errors in the dmesg output. UPDATE: I just looked at the strace output again (2012-11-06_2300), now it looks like this: lseek(4, 1419860611072, SEEK_SET) = 1419860611072 read(4, "3#\f\2447\335\0\22A\355\374\276j\204'\207|\217V|\23\245[\7VP\251\242\276\207\317:"..., 4096) = 4096 lseek(4, 43018145792, SEEK_SET) = 43018145792 write(4, "]\206\231\342Y\204-2I\362\242\344\6R\205\361\324\177\265\317C\334V\324\260\334\275t=\10F."..., 4096) = 4096 lseek(4, 1419860615168, SEEK_SET) = 1419860615168 read(4, "\262\305\314Y\367\37x\326\245\226\226\320N\333$s\34\204\311\222\7\315\236\336\300TK\337\264\236\211n"..., 4096) = 4096 lseek(4, 43018149888, SEEK_SET) = 43018149888 write(4, "\271\224m\311\224\25!I\376\16;\377\0\223H\25Yd\201Y\342\r\203\271\24eG<\202{\373V"..., 4096) = 4096 lseek(4, 1419860619264, SEEK_SET) = 1419860619264 read(4, ";d\360\177\n\346\253\210\222|\250\352T\335M\33\260\320\261\7g\222P\344H?t\240\20\2548\310"..., 4096) = 4096 lseek(4, 43018153984, SEEK_SET) = 43018153984 write(4, "\360\252j\317\310\251G\227\335{\214`\341\267\31Y\202\360\v\374\307oq\3063\217Z\223\313\36D\211"..., 4096) = 4096 So this number of the lseeks before the reads, like 1419860619264 are already a lot bigger, standing for 1.29 terabytes if the numbers are bytes, so it doesn't seem to be a linear progress on a big scale, maybe there are only some areas that need work, that have big gaps in between them. (times are in CET)

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• WCF timeouts are a nightmare

  - by Greg

  We have a bunch of WCF services that work almost all of the time, using various bindings, ports, max sizes, etc. The super-frustrating thing about WCF is that when it (rarely) fails, we are powerless to find out why it failed. Sometimes you will get a message that looks like this: System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '01:00:00'. --- System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. The problem is that the local socket timeout it's giving you is merely an attempt to be convenient. It may or may not be the cause of the problem. But OK, sometimes networks have issues. No big deal. We can retry or something. But here's the huge problem. On top of failing to tell you which precisely which timeout (if any) resulted in the failure ("your server-side receive timeout was exceeded," or something, would be helpful), WCF seems to have two types of timeouts. Timeout Type #1) A timeout, that, if increased, would increase the chance of your operation's success. So, the pertinent timeout is an hour, you are uploading a huge file that will take an hour and twenty minutes. It fails. You increase the timeout, it succeeds. I have no no problem with this type of timeout. Timeout Type #2) A timeout which merely defines how long you have to wait for the service to actually fail and give you an error, but modifying the value of this timeout has no impact on the chance of success. Basically, something happens during the first second of the service request which mucks things up. It will never recover. WCF doesn't magically retry the network connection for you. Fine, sometimes establishing a network connection doesn't go well. But, if your timeout is 2 hours, you have to wait 2 whole hours with no chance of it ever working before it finally acknowledges that it didn't work and gives you the error. But the error you see in both cases looks the same. With timeout Type #2, it still looks like you are running into a timeout. But, you could increase all of your timeouts to 4 years, and all it would do is make it take 4 years to get an error message. I know that Type #2 exists because I can do an operation that is known to complete in less than a minute when successful, and have it take 2 hours to fail. But, if I kill it and retry, it succeeds quickly. (If you are wondering why there might be a 2 hour timeout on an operation that takes less than a minute, there are times I run the operation with a much larger file and it could take over an hour.) So, to combat the problem with Type #2, you'd want your timeout to be really quick so you immediately know if there is a problem. Then you can retry. But the insurmountable problem is that because I don't know which timeouts are the cause of failure, I don't know what timeouts are Type #1 and which ones are Type #2. There may be one timeout (let's say the client-side send timeout) that acts like Type #1 in some cases and Type #2 in others. I have no idea, and I have no way of finding out. Does anyone know how to track down Type #2 timeouts so I can set them to low values without having to shorten actual (read: Type #1) timeouts and lower the chance of success? Thank you.

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• Python unicode Decode Error SUDs

  - by PylonsN00b

  OK so I have # -*- coding: utf-8 -*- at the top of my script and it worked for being able to pull data from the database that had funny chars(Ñ ,Õ,é,—,–,’,…) in it and store that data into variables...but I have run into other problems, see I pull my data, organize it, and then dump it into a variables like so: title = product[1] Where product[1] is from my database result set Then I load it up for Suds like so: array_of_inventory_item_submit = ca_client_inventory.factory.create('ArrayOfInventoryItemSubmit') for product in products: inventory_item_submit = ca_client_inventory.factory.create('InventoryItemSubmit') inventory_item_list = get_item_list(product) inventory_item_submit = [inventory_item_list] array_of_inventory_item_submit.InventoryItemSubmit.append(inventory_item_submit) #Call that service baby! ca_client_inventory.service.SynchInventoryItemList(accountID, array_of_inventory_item_submit) Where get_item_list sets product[1] to title and (including a whole bunch of other nodes): inventory_item_submit.Title = title So everything runs fine until I call ca_client_inventory.service.SynchInventoryItemList that contains array_of_inventory_item_submit which contains the title w/ the funky char...here is the error: Traceback (most recent call last): File "upload_all_inventory_ebay.py", line 421, in <module> ca_client_inventory.service.SynchInventoryItemList(accountID, array_of_inventory_item_submit) File "build/bdist.macosx-10.6-i386/egg/suds/client.py", line 539, in __call__ File "build/bdist.macosx-10.6-i386/egg/suds/client.py", line 592, in invoke File "build/bdist.macosx-10.6-i386/egg/suds/bindings/binding.py", line 118, in get_message File "build/bdist.macosx-10.6-i386/egg/suds/bindings/document.py", line 63, in bodycontent File "build/bdist.macosx-10.6-i386/egg/suds/bindings/document.py", line 105, in mkparam File "build/bdist.macosx-10.6-i386/egg/suds/bindings/binding.py", line 260, in mkparam File "build/bdist.macosx-10.6-i386/egg/suds/mx/core.py", line 62, in process File "build/bdist.macosx-10.6-i386/egg/suds/mx/core.py", line 75, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 102, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 243, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 182, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/core.py", line 75, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 102, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 298, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 182, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/core.py", line 75, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 102, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 298, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 182, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/core.py", line 75, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 102, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 243, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 182, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/core.py", line 75, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 102, in append File "build/bdist.macosx-10.6-i386/egg/suds/mx/appender.py", line 198, in append File "build/bdist.macosx-10.6-i386/egg/suds/sax/element.py", line 251, in setText File "build/bdist.macosx-10.6-i386/egg/suds/sax/text.py", line 43, in __new__ UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 116: ordinal not in range(128) Now what? My guess is my script can take in these funky chars because I have # -*- coding: utf-8 -*- at the top but Suds does NOT have that at the top of its files. Do I really want to go and change the Suds files...we all know this is the least desired last possible solution...what can I do?

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• Paying great programmers more than average programmers

  - by Kelly French

  It's fairly well recognized that some programmers are up to 10 times more productive than others. Joel mentions this topic on his blog. There is a whole blog devoted to the idea of the "10x productive programmer". In years since the original study, the general finding that "There are order-of-magnitude differences among programmers" has been confirmed by many other studies of professional programmers (Curtis 1981, Mills 1983, DeMarco and Lister 1985, Curtis et al. 1986, Card 1987, Boehm and Papaccio 1988, Valett and McGarry 1989, Boehm et al 2000). Fred Brooks mentions the wide range in the quality of designers in his "No Silver Bullet" article, The differences are not minor--they are rather like the differences between Salieri and Mozart. Study after study shows that the very best designers produce structures that are faster, smaller, simpler, cleaner, and produced with less effort. The differences between the great and the average approach an order of magnitude. The study that Brooks cites is: H. Sackman, W.J. Erikson, and E.E. Grant, "Exploratory Experimental Studies Comparing Online and Offline Programming Performance," Communications of the ACM, Vol. 11, No. 1 (January 1968), pp. 3-11. The way programmers are paid by employers these days makes it almost impossible to pay the great programmers a large multiple of what the entry-level salary is. When the starting salary for a just-graduated entry-level programmer, we'll call him Asok (From Dilbert), is $40K, even if the top programmer, we'll call him Linus, makes $120K that is only a multiple of 3. I'd be willing to be that Linus does much more than 3 times what Asok does, so why wouldn't we expect him to get paid more as well? Here is a quote from Stroustrup: "The companies are complaining because they are hurting. They can't produce quality products as cheaply, as reliably, and as quickly as they would like. They correctly see a shortage of good developers as a part of the problem. What they generally don't see is that inserting a good developer into a culture designed to constrain semi-skilled programmers from doing harm is pointless because the rules/culture will constrain the new developer from doing anything significantly new and better." This leads to two questions. I'm excluding self-employed programmers and contractors. If you disagree that's fine but please include your rationale. It might be that the self-employed or contract programmers are where you find the top-10 earners, but please provide a explanation/story/rationale along with any anecdotes. [EDIT] I thought up some other areas in which talent/ability affects pay. Financial traders (commodities, stock, derivatives, etc.) designers (fashion, interior decorators, architects, etc.) professionals (doctor, lawyer, accountant, etc.) sales Questions: Why aren't the top 1% of programmers paid like A-list movie stars? What would the industry be like if we did pay the "Smart and gets things done" programmers 6, 8, or 10 times what an intern makes? [Footnote: I posted this question after submitting it to the Stackoverflow podcast. It was included in episode 77 and I've written more about it as a Codewright's Tale post 'Of Rockstars and Bricklayers'] Epilogue: It's probably unfair to exclude contractors and the self-employed. One aspect of the highest earners in other fields is that they are free-agents. The competition for their skills is what drives up their earning power. This means they can not be interchangeable or otherwise treated as a plug-and-play resource. I liked the example in one answer of a major league baseball team trying to field two first-basemen. Also, something that Joel mentioned in the Stackoverflow podcast (#77). There are natural dynamics to shrink any extreme performance/pay ranges between the highs and lows. One is the peer pressure of organizations to pay within a given range, another is the likelyhood that the high performer will realize their undercompensation and seek greener pastures.

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• Rendering a WPF Network Map/Graph layout - Manual? PathListBox? Something Else?

  - by Ben Von Handorf

  I'm writing code to present the user with a simplified network map. At any given time, the map is focused on a specific item... say a router or a server. Based on the focused item, other network entities are grouped into sets (i.e. subnets or domains) and then rendered around the focused item. Lines would represent connections and groups would be visually grouped inside a rectangle or ellipse. Panning and zooming are required features. An item can be selected to display more information in a "properties" style window. An item could also be double-clicked to re-focus the entire network map on that item. At that point, the entire map would be re-calculated. I am using MVVM without any framework, as of yet. Assume the logic for grouping items and determining what should be shown or not is all in place. I'm looking for the best way to approach the UI layout. So far, I'm aware of the following options: Use a canvas for layout (inside a ScrollViewer to handle the panning). Have my ViewModel make use of a Layout Manager type of class, which would handle assigning all the layout properties (Top, Left, etc.). Bind my set of display items to an ItemsControl and use Data Templates to handle the actual rendering. The drawbacks with this approach: Highly manual layout on my part. Lots of calculation. I have to handle item selection manually. Computation of connecting lines is manual. The Pros of this approach: I can draw additional lines between child subnets as appropriate (manually). Additional LayoutManagers could be added later to render the display differently. This could probably be wrapped up into some sort of a GraphLayout control to be re-used. Present the focused item at the center of the display and then use a PathListBox for layout of the additional items. Have my ViewModel expose a simple list of things to be drawn and bind them to the PathListBox. Override the ListBoxItem Template to also create a line geometry from the borders of the focused item (tricky) to the bound item. Use DataTemplates to handle the case where the item being bound is a subnet, in which case we would use another PathListBox in the template to display items inside the subnet. The drawbacks with this approach: Selected Item synchronization across multiple `PathListBox`es. Only one item on the whole graph can be selected at a time, but each child PathListBox maintains its own selection. Also, subnets cannot be selected, but would be selectable without additional work. Drawing the connecting lines is going to be a bit of trickery in the ListBoxItem template, since I need to know the correct side of the focused item to connect to. The pros of this approach: I get to stay out of the layout business, more. I'm looking for any advice or thoughts from others who have encountered similar issues or who have more WPF experience than I. I'm using WPF 4, so any new tricks are legal and encouraged.

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• facebook iframe stream.Publish cannot close dialog or skip

  - by fooyee

  am pulling my hair over this :( spent 10 hrs but nothing came out I read this thread http://forum.developers.facebook.com/viewtopic.php?pid=198128 but it didn't help much. I'm running a local dev App Engine server ( localhost:8080 ) iframe app so I have a couple of problems. 1) on safari 4.0.4, the publish story dialog comes up nicely with all images/data/action_links. upon posting a story (or skipping), the dialog goes blank and wouldn't close. 2) I tested the same code on firefox 3.5.8, the dialog comes up with all images/data/action_links, but then the whole thing freezes. Clicking anywhere on the dialog doesn't help at all. If i'm patient enough and click "publish", I have to wait for abt 10 seconds before the dialog says "story is published". then it freezes. (clicking on skip doesn't make a difference). btw, there is no "button clicking effect" : ie: the buttons don't look like they "sink down" upon clicking. I checked the firefox memory using the command "top" on the terminal, it all seems okay, no spike in CPU processes ( i could open other firefox tabs and work on them) My futile attempts at solving the problems... 1) so i thought, hmm could this be because of local dev (localhost) problem? I uploaded the code to the production server, the same thing happens. 2) I tried an older firefox (3.1) and the same problem persisted ( the freezing ) 3) I noticed that i kind of used 2 different FB features ( Connect and XFBML). The Connect Feature I used in the PostStory function. The XFBML feature I used before the tag. So I thought, hmm ... I tried replacing the FB_RequireFeatures["Connect"] feature with FB_RequireFeatures["XFBML"]. nothing changed. I still can't close the story dialog. 4) Is there a possibility that I didn't connect to xd_receiver.htm properly? my xd_receiver.htm is stored in my folder /media/fbconnect in my app.yaml handler: - url: /fbconnect static_dir: media/fbconnect so i thought a connection has to be established with xd_receiver.htm. any way I can test that? here're all the codes: <script type="text/javascript"> //post story function function PostStory() { //init facebook FB_RequireFeatures(["Connect"], function() { FB.Facebook.init('my_app_key', "/fbconnect/xd_receiver.htm"); FB.ensureInit(function() { var message = 'the message'; var attachment = { 'name': 'a simple app to send gifts', 'href': 'http://apps.facebook.com/my_app_name', 'caption': '{*actor*} sent u something', 'description': 'some description', "media": [{ "type": "image", "src": "http://bit.ly/105QYr", "href": "http://bit.ly/105QYr"}] }; //action links can only be seen AFTER the feed is published var action_links = [{ 'text': 'Send him/her a gift back!', 'href': 'http://somelink.com'}]; FB.Connect.streamPublish(message, attachment, action_links, null, "Share the gift with your friends", callback, false, null); }); }); function callback(post_id, exception) { //alert('Wall Post Complete'); } } </script> just before the end of the /body tag, i have this: <script type="text/javascript"> function callFBInit() { FB_RequireFeatures( ["XFBML"], function(){ FB.Facebook.init("my_app_key", "/fbconnect/xd_receiver.htm"); } ); } callFBInit(); btw, my xd_receiver.htm contains: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns=? http://www.w3.org/1999/xhtml? > <head> <title>cross-domain receiver page</title> </head> <body> <script src=?http://static.ak.facebook.com/js/api_lib/v0.4/xdcommreceiver.debug.js? type=? text/javascript? ></script> </body> </html> hope you guys can help out. thx

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• Treeview - Hierarchical Data Template - Binding does not update on source change?

  - by ClearsTheScreen

  Greetings! I ran into this problem in my project (Silverlight 3 with C#): I have a TreeView which is data bound to, well, a tree. This TreeView has a HierarchicalDataTamplate in a resource dictionary, that defines various controls. Now I want to hide (Visibility.Collapse) some items depending on wether a node has children or not. Other items shall be visible under the same condition. It works like charm when I first bind the source tree to the TreeView, but when I change the source tree, the visibility in the treeview does not change. XAML - page: <controls:TreeView x:Name="SankeyTreeView" ItemContainerStyle="{StaticResource expandedTreeViewItemStyle}" ItemTemplate="{StaticResource SankeyTreeTemplate}"> <controls:TreeViewItem IsExpanded="True"> <controls:TreeViewItem.HeaderTemplate> <DataTemplate> <TextBlock Text="This is just for loading and will be replaced directly after the data becomes available..."/> </DataTemplate> </controls:TreeViewItem.HeaderTemplate> </controls:TreeViewItem> </controls:TreeView> XAML - ResourceDictionary <!-- Each node in the tree is structurally identical, hence only one Hierarchical Data Template that'll use itself on the children. --> <Data:HierarchicalDataTemplate x:Key="SankeyTreeTemplate" ItemsSource="{Binding Children}"> <Grid Height="24"> <TextBlock x:Name="TextBlockName" Text="{Binding Path=Value.name, Mode=TwoWay}" VerticalAlignment="Center" Foreground="Black"/> <TextBox x:Name="TextBoxFlow" Text="{Binding Path=Value.flow, Mode=TwoWay}" Grid.Column="1" Visibility="{Binding Children, Converter={StaticResource BoxConverter}, ConverterParameter=\{box\}}"/> <TextBlock x:Name="TextBlockThroughput" Text="{Binding Path=Value.throughput, Mode=TwoWay}" Grid.Column="1" Visibility="{Binding Children, Converter={StaticResource BoxConverter}, ConverterParameter=\{block\}}"/> <Button x:Name="ButtonAddNode"/> <Button x:Name="ButtonDeleteNode"/> <Button x:Name="ButtonEditNode"/> </Grid> </Data:HierarchicalDataTemplate> Now, as you can see, the TextBoxFlow and the TextBlockThroughput share the same space. What I aim at: The "Throughput" value of a node is how much of something 'flows' through this node from its children. It can't be changed directly, so I want to display a text block. Only leaf nodes have a TextBox to let someone enter the 'flow' that is generated in this leaf node. (I.E.: Node.Throughput = Node.Flow + Sum(Children.Throughput), where Node.Flow = 0 for each non-leaf.) What the BoxConverter (silly name -.-) does: public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if ((value as NodeList<TreeItem>).Count > 1) // Node has Children? { if ((parameter as String) == "{box}") { return Visibility.Collapsed; } else ((parameter as String) == "{block}") { return Visibility.Visible; } } else { /* * As above, just with Collapsed and Visible switched */ } } The structure of the tree that is bound to the TreeView is essentially stolen from Dan Vanderboom (a bit too much to dump the whole code here), except that I here of course use an ObservableCollection for the children and the value items implement INotifyPropertyChanged. I would be very grateful if someone could explain to me, why inserting items into the underlying tree does not update the visibility for box and block. Thank you in advance!

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• How to prevent jQuery FancyBox from closing immediately after submit?

  - by Dimitri

  Hi! I'm loading an inline registration form in a FancyBox from jQuery. However after submitting the form, the box immediately closes while there is some feedback that I want to show the user in the FancyBox itself. This feedback is generated on the server side and is printed in the FancyBox. How can I make the box only closing when their is no feedback anymore? I was thinking about using ajax to just refresh the FancyBox itself and not the whole page after refreshing. But I just can't figure out how this ajax $.ajax({type, cache, url, data, success}); works... Also it seems like there's no reaction from the 'submit bind' in the javascript. I hope someone can help me with this problem. I paste my code below. If any questions, plz ask.. Thx in advance! This is the javascript: <script type="text/javascript"> $(document).ready(function() { $("#various1").fancybox({ 'transitionIn' : 'none', 'transitionOut' : 'none', 'scrolling' : 'no', 'titleShow' : false, 'onClosed' : function() { $("#registration_error").hide(); } }); }); $("#registration_form").bind("submit", function() { if ($("#registration_error").val() != "Registration succeeded!") { $("#registration_error").show(); $.fancybox.resize(); return false; } $.fancybox.showActivity(); $.ajax({ type : "POST", cache : false, url : "/data/login.php", data : $(this).serializeArray(), success : function(data) { $.fancybox(data); } }); return false; }); This is the inline form that I show in the FancyBox: <div style="display: none;"> <div id="registration" style="width:227px;height:250px;overflow:auto;padding:7px;"> <?php echo "<p id=\"registration_error\">".$feed."</p>"; ?> <form id="registration_form" action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post"> <p> <label for="username">Username: </label> <input type="text" id="login_name" name="username" size="30" /> </p> <p> <label for="password">Password: </label> <input type="password" id="pass" name="pw" size="30" /> </p> <p> <label for="repeat_password">Repeat password: </label> <input type="password" id="rep_pass" name="rep_pw" size="30" /> </p> <p> <input type="submit" value="Register" name="register" id="reg" /> </p> <p> <em></em> </p> </form> </div> </div>

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• Apache2 VirtualHost Configuration with SSL

  - by Peter

  Hello! I'm new here and I have a strange problem which needs to be solved. Previously I searched in the whole forum and I've read all of related questions but I didn't find solution to my question. We have two servers and a firewall computer. On the Server#1 there is an Apache 2.2 web server and it forwards the incoming traffic to the appropriate ports, to our subdomains by its virtual host configuration (Apache, Tomcat, IIS, Server#2 and so on). We recently bought an SSL certificate to protect one of our subdomain. I successfully installed and configured the certificate into the Apache and it works flawlessly within our local network. Our Kerio Winroute Firewall is configured to permit https traffic and it is translated to Server#1. But all of our subdomains are unavailable from outside (http & https too). Web browser shows "Failed to connect" message. Now, I enclose some parts from our httpd.conf and httpd-vhosts.conf file. httpd.conf ServerRoot "C:/Program Files/Apache Software Foundation/Apache2.2" Listen 80 ServerName dev.mydomain.hu:80 DocumentRoot "C:/Program Files/Apache Software Foundation/Apache2.2/htdocs" LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_connect_module modules/mod_proxy_connect.so LoadModule proxy_http_module modules/mod_proxy_http.so LoadModule rewrite_module modules/mod_rewrite.so LoadModule ssl_module modules/mod_ssl.so Include conf/extra/httpd-vhosts.conf <IfModule ssl_module> SSLMutex default SSLRandomSeed startup builtin SSLRandomSeed connect builtin SSLSessionCache none </IfModule> httpd-vhosts.conf NameVirtualHost *:80 NameVirtualHost *:443 Listen 443 <VirtualHost *:80> DocumentRoot "C:/Program Files/Apache Software Foundation/Apache2.2/htdocs" ServerName localhost </VirtualHost> #-------EXCHANGE SERVER-------- <VirtualHost *:80> ServerName intra.mydomain.hu ProxyRequests Off ProxyVia On ProxyPass / http://myserver:8080/ ProxyPassReverse / http://myserver:8080/ <Proxy *:80> Order deny,allow Allow from all </Proxy> <Location /> Order allow,deny Allow from all </Location> ErrorLog "c:/Program Files/Apache Software Foundation/Apache2.2/logs/exchange.log" CustomLog "c:/Program Files/Apache Software Foundation/Apache2.2/logs/exchange_cust.log" common LogLevel info </VirtualHost> #--------FITNESSE SERVER------- <VirtualHost *:80> ServerName test.mydomain.hu ProxyRequests Off <Proxy *:80> Order deny,allow Allow from all </Proxy> ProxyPass / http://myserver:8004/ ProxyPassReverse / http://myserver:8004/ <Location /> AuthType Basic AuthName "FitNesse" AuthUserFile "C:/Program Files/Apache Software Foundation/Apache2.2/auth/password" AuthGroupFile "C:/Program Files/Apache Software Foundation/Apache2.2/auth/pwgroup" require group Users Order allow,deny Allow from all </Location> ErrorLog "c:/Program Files/Apache Software Foundation/Apache2.2/logs/fitnesse.log" CustomLog "c:/Program Files/Apache Software Foundation/Apache2.2/logs/fitnesse_cust.log" common LogLevel info </VirtualHost> #----WIKI SERVER-----(SSL)- <VirtualHost *:80 *:443> ServerName wiki.mydomain.hu ServerAlias wiki.mydomain.hu SSLEngine On SSLCertificateFile "C:/Program Files/Apache Software Foundation/Apache2.2/cert/certificate.cer" SSLCertificateKeyFile "C:/Program Files/Apache Software Foundation/Apache2.2/cert/wiki.itkodex.hu.key" ProxyRequests Off <Proxy *:80> Order deny,allow Allow from all </Proxy> ProxyPass / http://localhost:8000/ ProxyPassReverse / http://localhost:8000/ ErrorLog "c:/Program Files/Apache Software Foundation/Apache2.2/logs/wiki.log" CustomLog "c:/Program Files/Apache Software Foundation/Apache2.2/logs/wikicust.log" common LogLevel info </VirtualHost> Because this wiki is a JSPWIKI web application, runs on Apache Tomcat therefore there is no "DocumentRoot" parameter in the VirtualHost. Could anybody please help me, to solve this issue, or what should I modify in the configuration? Thanks in advance! Peter

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• Class initialization issues loading java.util.LogManager in Android Dalvik VM

  - by Freddy B. Rose

  I've done changes in an Android native library and installed a new system.img file but am now getting an unrelated Error on startup. I can get past it by swallowing the error but I wanted to know if anyone can explain what the issue is. The Android implementation of Logger.java claims that it is Forcing the LogManager to be initialized since its class init code performs necessary one-time setup. But this forced initialization results in a NoClassDefFoundError. I'm thinking that it has something to do with the class not having been preloaded by Zygote yet but am not that familiar with the whole class loaders and VM business. If anyone has some insight it would be greatly appreciated. Thanks. I/Zygote ( 1253): Preloading classes... D/skia ( 1253): ------ build_power_table 1.4 D/skia ( 1253): ------ build_power_table 0.714286 W/dalvikvm( 1253): Exception Ljava/lang/StackOverflowError; thrown during Ljava/util/logging/LogManager;. W/dalvikvm( 1253): Exception Ljava/lang/NoClassDefFoundError; thrown during Ljava/security/Security;. W/dalvikvm( 1253): Exception Ljava/lang/ExceptionInInitializerError; thrown during Landroid/net/http/HttpsConnection;. E/Zygote ( 1253): Error preloading android.net.http.HttpsConnection. E/Zygote ( 1253): java.lang.ExceptionInInitializerError E/Zygote ( 1253): at java.lang.Class.classForName(Native Method) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:237) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:183) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.preloadClasses(ZygoteInit.java:295) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590) E/Zygote ( 1253): at dalvik.system.NativeStart.main(Native Method) E/Zygote ( 1253): Caused by: java.lang.ExceptionInInitializerError E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:57) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:56) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory.getDefaultAlgorithm(KeyManagerFactory.java:55) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLParameters.(SSLParameters.java:142) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLContextImpl.engineInit(SSLContextImpl.java:82) E/Zygote ( 1253): at android.net.http.HttpsConnection.initializeEngine(HttpsConnection.java:101) E/Zygote ( 1253): at android.net.http.HttpsConnection.(HttpsConnection.java:65) E/Zygote ( 1253): ... 6 more E/Zygote ( 1253): Caused by: java.lang.NoClassDefFoundError: java.util.logging.LogManager E/Zygote ( 1253): at java.util.logging.Logger.initHandler(Logger.java:419) E/Zygote ( 1253): at java.util.logging.Logger.log(Logger.java:1094) E/Zygote ( 1253): at java.util.logging.Logger.warning(Logger.java:906) E/Zygote ( 1253): at org.apache.harmony.luni.util.MsgHelp.loadBundle(MsgHelp.java:61) E/Zygote ( 1253): at org.apache.harmony.luni.util.Msg.getString(Msg.java:60) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:316) E/Zygote ( 1253): at java.io.FilterInputStream.read(FilterInputStream.java:138) E/Zygote ( 1253): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:157) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:243) E/Zygote ( 1253): at java.util.Properties.load(Properties.java:302) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:80) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:67) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at java.security.Security.(Security.java:66) E/Zygote ( 1253): ... 15 more W/dalvikvm( 1253): threadid=3: thread exiting with uncaught exception (group=0x2aac6170)

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• Optimizing Jaro-Winkler algorithm

  - by Pentium10

  I have this code for Jaro-Winkler algorithm taken from this website. I need to run 150,000 times to get distance between differences. It takes a long time, as I run on an Android mobile device. Can it be optimized more? public class Jaro { /** * gets the similarity of the two strings using Jaro distance. * * @param string1 the first input string * @param string2 the second input string * @return a value between 0-1 of the similarity */ public float getSimilarity(final String string1, final String string2) { //get half the length of the string rounded up - (this is the distance used for acceptable transpositions) final int halflen = ((Math.min(string1.length(), string2.length())) / 2) + ((Math.min(string1.length(), string2.length())) % 2); //get common characters final StringBuffer common1 = getCommonCharacters(string1, string2, halflen); final StringBuffer common2 = getCommonCharacters(string2, string1, halflen); //check for zero in common if (common1.length() == 0 || common2.length() == 0) { return 0.0f; } //check for same length common strings returning 0.0f is not the same if (common1.length() != common2.length()) { return 0.0f; } //get the number of transpositions int transpositions = 0; int n=common1.length(); for (int i = 0; i < n; i++) { if (common1.charAt(i) != common2.charAt(i)) transpositions++; } transpositions /= 2.0f; //calculate jaro metric return (common1.length() / ((float) string1.length()) + common2.length() / ((float) string2.length()) + (common1.length() - transpositions) / ((float) common1.length())) / 3.0f; } /** * returns a string buffer of characters from string1 within string2 if they are of a given * distance seperation from the position in string1. * * @param string1 * @param string2 * @param distanceSep * @return a string buffer of characters from string1 within string2 if they are of a given * distance seperation from the position in string1 */ private static StringBuffer getCommonCharacters(final String string1, final String string2, final int distanceSep) { //create a return buffer of characters final StringBuffer returnCommons = new StringBuffer(); //create a copy of string2 for processing final StringBuffer copy = new StringBuffer(string2); //iterate over string1 int n=string1.length(); int m=string2.length(); for (int i = 0; i < n; i++) { final char ch = string1.charAt(i); //set boolean for quick loop exit if found boolean foundIt = false; //compare char with range of characters to either side for (int j = Math.max(0, i - distanceSep); !foundIt && j < Math.min(i + distanceSep, m - 1); j++) { //check if found if (copy.charAt(j) == ch) { foundIt = true; //append character found returnCommons.append(ch); //alter copied string2 for processing copy.setCharAt(j, (char)0); } } } return returnCommons; } } I mention that in the whole process I make just instance of the script, so only once jaro= new Jaro(); If you are going to test and need examples so not break the script, you will find it here, in another thread for python optimization.

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• HgWebDir push permission denied error

  - by Gregg

  I have a new Fedora 12 server that I am attempting to set up Mercurial on. I have yum installed mercurial, and most things seem to work fine. However, after setting up hgwebdir.cgi through apache, I am unable to do an hg push to the only repo currently being hosted. The error I get back is: searching for changes abort: HTTP Error 500: Permission denied: .hg/store/lock httpd is running as user apache UID PID PPID C STIME TTY TIME CMD root 1691 1 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1694 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1695 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1696 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1697 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1698 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1699 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1700 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd apache 1701 1691 0 13:19 ? 00:00:00 /usr/sbin/httpd and I set permissions so that the apache user owns the whole repo and everything. In a last ditch attempt, I even made the repo globally writable. [root@builds .hg]# ll total 424K drwxrwxrwx. 3 apache apache 4.0K 2010-04-19 14:43 . drwxrwxrwx. 19 apache apache 4.0K 2010-04-15 13:33 .. -rw-rw-rw-. 2 apache apache 57 2010-04-13 11:42 00changelog.i -rw-rw-rw-. 1 apache apache 93 2010-04-16 15:33 branchheads.cache -rw-rw-rw-. 1 apache apache 192K 2010-04-15 13:33 dirstate -rw-r--r--. 1 apache apache 156 2010-04-19 14:43 hgrc -rw-rw-rw-. 1 apache apache 42 2010-04-15 13:33 last-message.txt -rw-rw-rw-. 2 apache apache 23 2010-04-13 11:42 requires drwxrwxrwx. 4 apache apache 4.0K 2010-04-19 11:26 store -rw-rw-rw-. 1 apache apache 45 2010-04-14 14:08 tags.cache -rw-rw-rw-. 1 apache apache 7 2010-04-16 15:33 undo.branch -rw-rw-rw-. 1 apache apache 192K 2010-04-16 15:33 undo.dirstate [root@builds .hg]# cd store [root@builds store]# ll total 308K drwxrwxrwx. 4 apache apache 4.0K 2010-04-19 11:26 . drwxrwxrwx. 3 apache apache 4.0K 2010-04-19 14:43 .. -rw-rw-rw-. 1 apache apache 20K 2010-04-16 15:33 00changelog.i -rw-rw-rw-. 1 apache apache 81K 2010-04-16 15:33 00manifest.i drwxrwxrwx. 17 apache apache 4.0K 2010-04-13 11:47 data drwxrwxrwx. 3 apache apache 4.0K 2010-04-13 11:43 dh -rw-rw-rw-. 2 apache apache 177K 2010-04-15 11:03 fncache -rw-rw-rw-. 1 apache apache 67 2010-04-16 15:33 undo I have a clone of the repo elsewhere on the machine running as a different user. If I set the the default value in the [paths] section of the clones hgrc file to the local filepath on the server, the push works fine, but if I switch it to use the url, I get the error every time. Some possible quirks in how I've set this up... hgwebdir.cgi is sitting in /var/www/cgi-bin and the repo is a child of /opt/hg. I turned off suexec as well, and this doesn't seem to clear up the issue. The only line I added in the apache config to get hgwebdir running is: ScriptAlias /hg "/var/www/cgi-bin/hgwebdir.cgi" The hgweb.config is also in /var/www/cgi-bin and it's contents are: [collections] /opt/hg = /opt/hg [trusted] users = * [web] baseurl = /hg push_ssl = false allow_push = * The repo browser is working fine, it's just push that doesn't work. Apache error_log doesn't have anything in about this error at all.

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• Class initialization issues loading java.util.logging.LogManager in Android Dalvik VM

  - by Freddy B. Rose

  I've done changes in an Android native library and installed a new system.img file but am now getting an unrelated Error on startup. I can get past it by swallowing the error but I wanted to know if anyone can explain what the issue is. The Android implementation of Logger.java claims that it is Forcing the LogManager to be initialized since its class init code performs necessary one-time setup. But this forced initialization results in a NoClassDefFoundError. I'm thinking that it has something to do with the class not having been preloaded by Zygote yet but am not that familiar with the whole class loaders and VM business. If anyone has some insight it would be greatly appreciated. Thanks. I/Zygote ( 1253): Preloading classes... D/skia ( 1253): ------ build_power_table 1.4 D/skia ( 1253): ------ build_power_table 0.714286 W/dalvikvm( 1253): Exception Ljava/lang/StackOverflowError; thrown during Ljava/util/logging/LogManager;. W/dalvikvm( 1253): Exception Ljava/lang/NoClassDefFoundError; thrown during Ljava/security/Security;. W/dalvikvm( 1253): Exception Ljava/lang/ExceptionInInitializerError; thrown during Landroid/net/http/HttpsConnection;. E/Zygote ( 1253): Error preloading android.net.http.HttpsConnection. E/Zygote ( 1253): java.lang.ExceptionInInitializerError E/Zygote ( 1253): at java.lang.Class.classForName(Native Method) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:237) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:183) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.preloadClasses(ZygoteInit.java:295) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590) E/Zygote ( 1253): at dalvik.system.NativeStart.main(Native Method) E/Zygote ( 1253): Caused by: java.lang.ExceptionInInitializerError E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:57) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:56) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory.getDefaultAlgorithm(KeyManagerFactory.java:55) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLParameters.(SSLParameters.java:142) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLContextImpl.engineInit(SSLContextImpl.java:82) E/Zygote ( 1253): at android.net.http.HttpsConnection.initializeEngine(HttpsConnection.java:101) E/Zygote ( 1253): at android.net.http.HttpsConnection.(HttpsConnection.java:65) E/Zygote ( 1253): ... 6 more E/Zygote ( 1253): Caused by: java.lang.NoClassDefFoundError: java.util.logging.LogManager E/Zygote ( 1253): at java.util.logging.Logger.initHandler(Logger.java:419) E/Zygote ( 1253): at java.util.logging.Logger.log(Logger.java:1094) E/Zygote ( 1253): at java.util.logging.Logger.warning(Logger.java:906) E/Zygote ( 1253): at org.apache.harmony.luni.util.MsgHelp.loadBundle(MsgHelp.java:61) E/Zygote ( 1253): at org.apache.harmony.luni.util.Msg.getString(Msg.java:60) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:316) E/Zygote ( 1253): at java.io.FilterInputStream.read(FilterInputStream.java:138) E/Zygote ( 1253): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:157) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:243) E/Zygote ( 1253): at java.util.Properties.load(Properties.java:302) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:80) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:67) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at java.security.Security.(Security.java:66) E/Zygote ( 1253): ... 15 more W/dalvikvm( 1253): threadid=3: thread exiting with uncaught exception (group=0x2aac6170)

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• How do you pass user credentials from WebClient to a WCF REST service?

  - by Alex

  I am trying to expose a WCT REST service and only users with valid username and password would be able to access it. The username and password are stored in a SQL database. Here is the service contract: public interface IDataService { [OperationContract] [WebGet(ResponseFormat = WebMessageFormat.Json)] byte[] GetData(double startTime, double endTime); } Here is the WCF configuration: <bindings> <webHttpBinding> <binding name="SecureBinding"> <security mode="Transport"> <transport clientCredentialType="Basic"/> </security> </binding> </webHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="DataServiceBehavior"> <serviceMetadata httpGetEnabled="true"/> <serviceCredentials> <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType= "CustomValidator, WCFHost" /> </serviceCredentials> </behavior> </serviceBehaviors> </behaviors> <services> <service behaviorConfiguration="DataServiceBehavior" name="DataService"> <endpoint address="" binding="webHttpBinding" bindingConfiguration="SecureBinding" contract="IDataService" /> </service> </services> I am accessing the service via the WebClient class within a Silverlight application. However, I have not been able to figure out how to pass the user credentials to the service. I tried various values for client.Credentials but none of them seems to trigger the code in my custom validator. I am getting the following error: The underlying connection was closed: An unexpected error occurred on a send. Here is some sample code I have tried: WebClient client = new WebClient(); client.Credentials = new NetworkCredential("name", "password", "domain"); client.OpenReadCompleted += new OpenReadCompletedEventHandler(GetData); client.OpenReadAsync(new Uri(uriString)); If I set the security mode to None, the whole thing works. I also tried other clientCredentialType values and none of them worked. I also self-hosted the WCF service to eliminate the issues related to IIS trying to authenticate a user before the service gets a chance. Any comment on what the underlying issues may be would be much appreciated. Thanks. Update: Thanks to Mehmet's excellent suggestions. Here is the tracing configuration I had: <system.diagnostics> <sources> <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true"> <listeners> <add name="xml" /> </listeners> </source> <source name="System.IdentityModel" switchValue="Information, ActivityTracing" propagateActivity="true"> <listeners> <add name="xml" /> </listeners> </source> </sources> <sharedListeners> <add name="xml" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:\Traces.svclog" /> </sharedListeners> </system.diagnostics> But I did not see any message coming from my Silverlight client. As for https vs http, I used https as follows: string baseAddress = "https://localhost:6600/"; _webServiceHost = new WebServiceHost(typeof(DataServices), new Uri(baseAddress)); _webServiceHost.Open(); However, I did not configure any SSL certificate. Is this the problem?

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• CSG operations on implicit surfaces with marching cubes [SOLVED]

  - by Mads Elvheim

  I render isosurfaces with marching cubes, (or perhaps marching squares as this is 2D) and I want to do set operations like set difference, intersection and union. I thought this was easy to implement, by simply choosing between two vertex scalars from two different implicit surfaces, but it is not. For my initial testing, I tried with two spheres circles, and the set operation difference. i.e A - B. One circle is moving and the other one is stationary. Here's the approach I tried when picking vertex scalars and when classifying corner vertices as inside or outside. The code is written in C++. OpenGL is used for rendering, but that's not important. Normal rendering without any CSG operations does give the expected result. void march(const vec2& cmin, //min x and y for the grid cell const vec2& cmax, //max x and y for the grid cell std::vector<vec2>& tri, float iso, float (*cmp1)(const vec2&), //distance from stationary circle float (*cmp2)(const vec2&) //distance from moving circle ) { unsigned int squareindex = 0; float scalar[4]; vec2 verts[8]; /* initial setup of the grid cell */ verts[0] = vec2(cmax.x, cmax.y); verts[2] = vec2(cmin.x, cmax.y); verts[4] = vec2(cmin.x, cmin.y); verts[6] = vec2(cmax.x, cmin.y); float s1,s2; /********************************** ********For-loop of interest****** *******Set difference between **** *******two implicit surfaces****** **********************************/ for(int i=0,j=0; i<4; ++i, j+=2){ s1 = cmp1(verts[j]); s2 = cmp2(verts[j]); if((s1 < iso)){ //if inside circle1 if((s2 < iso)){ //if inside circle2 scalar[i] = s2; //then set the scalar to the moving circle } else { scalar[i] = s1; //only inside circle1 squareindex |= (1<<i); //mark as inside } } else { scalar[i] = s1; //inside neither circle } } if(squareindex == 0) return; /* Usual interpolation between edge points to compute the new intersection points */ verts[1] = mix(iso, verts[0], verts[2], scalar[0], scalar[1]); verts[3] = mix(iso, verts[2], verts[4], scalar[1], scalar[2]); verts[5] = mix(iso, verts[4], verts[6], scalar[2], scalar[3]); verts[7] = mix(iso, verts[6], verts[0], scalar[3], scalar[0]); for(int i=0; i<10; ++i){ //10 = maxmimum 3 triangles, + one end token int index = triTable[squareindex][i]; //look up our indices for triangulation if(index == -1) break; tri.push_back(verts[index]); } } This gives me weird jaggies: It looks like the CSG operation is done without interpolation. It just "discards" the whole triangle. Do I need to interpolate in some other way, or combine the vertex scalar values? I'd love some help with this. A full testcase can be downloaded HERE EDIT: Basically, my implementation of marching squares works fine. It is my scalar field which is broken, and I wonder what the correct way would look like. Preferably I'm looking for a general approach to implement the three set operations I discussed above, for the usual primitives (circle, rectangle/square, plane)

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• Microsoft SyncFramework - Sync different tables into one

  - by evnu

  Hello, we are trying to get the Microsoft SyncFramework running in our application to synchronize an oracle db with a mobile device. Problem The queries that we need to gather the data on the oracle db take much time (and we haven't found a way to speed them up yet), so we try to split them up in as much portions as possible. One big part of the whole problem is, that we need different information out of one big table, that bloats a query if combined. Unfortunately, the SyncFramework allows only one TableAdapter per SyncTable. Now this is a problem for our application: If we were able to use more than one TableAdapter per SyncTable, we could easily spread the queries in a more efficient way. Using one query per Table which combines all the needed data takes way too much time. Ideas I thought of creating different TableAdapters for each one of the required queries and then merge the resulting datasets afterwards (preferably on the server). This seems to work, but is a rather awkward solution. Does someone of you know a better solution? Or do you have some ideas that could help? Thanks in advance, evnu EDIT: So, I implemented the merge solution. If you are interested, take a look at the following code. I'll give more details if there are questions. <WebMethod()> _ Public Function GetChanges(ByVal groupMetadata As SyncGroupMetadata, ByVal syncSession As SyncSession) As SyncContext Dim stream As MemoryStream Dim format As BinaryFormatter = New BinaryFormatter Dim anchors As Dictionary(Of String, Byte()) ' keep track of the tables that will be updated Dim addTables As Dictionary(Of String, List(Of SyncTableMetadata)) = New Dictionary(Of String, List(Of SyncTableMetadata)) ' list of all present anchors Dim allAnchors As Dictionary(Of String, Byte()) = New Dictionary(Of String, Byte()) ' fill allAnchors - deserialize all given anchors For Each Table As SyncTableMetadata In groupMetadata.TablesMetadata If Table.LastReceivedAnchor Is Nothing Or Table.LastReceivedAnchor.IsNull Then Continue For stream = New MemoryStream(Table.LastReceivedAnchor.Anchor) anchors = format.Deserialize(stream) For Each item As KeyValuePair(Of String, Byte()) In anchors allAnchors.Add(item.Key, item.Value) Next stream.Dispose() Next For Each Table As SyncTableMetadata In groupMetadata.TablesMetadata If allAnchors.ContainsKey(Table.TableName) Then Table.LastReceivedAnchor.Anchor = allAnchors(Table.TableName) End If Dim addSyncTables As List(Of SyncTableMetadata) If syncSession.SyncParameters.Contains(Table.TableName) Then Dim tableNames() As String = syncSession.SyncParameters(Table.TableName).Value.ToString.Split(":") addSyncTables = New List(Of SyncTableMetadata) For Each tableName As String In tableNames Dim newSynctable As SyncTableMetadata = New SyncTableMetadata newSynctable.TableName = tableName If allAnchors.ContainsKey(tableName) Then Dim anker As SyncAnchor = New SyncAnchor(allAnchors(tableName)) newSynctable.LastReceivedAnchor = anker Else newSynctable.LastReceivedAnchor = Nothing End If newSynctable.SyncDirection = Table.SyncDirection addSyncTables.Add(newSynctable) Next addTables.Add(Table.TableName, addSyncTables) End If Next ' add the newly created synctables For Each item As KeyValuePair(Of String, List(Of SyncTableMetadata)) In addTables For Each Table As SyncTableMetadata In item.Value groupMetadata.TablesMetadata.Add(Table) Next Next ' fire queries Dim context As SyncContext = servSyncProvider.GetChanges(groupMetadata, syncSession) ' merge resulting datasets For Each item As KeyValuePair(Of String, List(Of SyncTableMetadata)) In addTables For Each Table As SyncTableMetadata In item.Value If context.DataSet.Tables.Contains(Table.TableName) Then If Not context.DataSet.Tables.Contains(item.Key) Then Dim tmp As DataTable = context.DataSet.Tables(Table.TableName).Copy tmp.TableName = item.Key context.DataSet.Tables.Add(tmp) Else context.DataSet.Tables(item.Key).Merge(context.DataSet.Tables(Table.TableName)) context.DataSet.Tables.Remove(Table.TableName) End If End If Next Next ' create new anchors Dim allAnchorsDict As Dictionary(Of String, Byte()) = New Dictionary(Of String, Byte()) For Each Table As SyncTableMetadata In groupMetadata.TablesMetadata allAnchorsDict.Add(Table.TableName, context.NewAnchor.Anchor) Next stream = New MemoryStream format.Serialize(stream, allAnchorsDict) context.NewAnchor.Anchor = stream.ToArray stream.Dispose() Return context End Function

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• Core Data - JSON (TouchJSON) on iPhone

  - by Urizen

  I have the following code which seems to go on indefinitely until the app crashes. It seems to happen with the recursion in the datastructureFromManagedObject method. I suspect that this method: 1) looks at the first managed object and follows any relationship property recursively. 2) examines the object at the other end of the relationship found at point 1 and repeats the process. Is it possible that if managed object A has a to-many relationship with object B and that relationship is two-way (i.e an inverse to-one relationship to A from B - e.g. one department has many employees but each employee has only one department) that the following code gets stuck in infinite recursion as it follows the to-one relationship from object B back to object A and so on. If so, can anyone provide a fix for this so that I can get my whole object graph of managed objects converted to JSON. #import "JSONUtils.h" @implementation JSONUtils - (NSDictionary*)dataStructureFromManagedObject:(NSManagedObject *)managedObject { NSDictionary *attributesByName = [[managedObject entity] attributesByName]; NSDictionary *relationshipsByName = [[managedObject entity] relationshipsByName]; //getting the values correspoinding to the attributes collected in attributesByName NSMutableDictionary *valuesDictionary = [[managedObject dictionaryWithValuesForKeys:[attributesByName allKeys]] mutableCopy]; //sets the name for the entity being encoded to JSON [valuesDictionary setObject:[[managedObject entity] name] forKey:@"ManagedObjectName"]; NSLog(@"+++++++++++++++++> before the for loop"); //looks at each relationship for the given managed object for (NSString *relationshipName in [relationshipsByName allKeys]) { NSLog(@"The relationship name = %@",relationshipName); NSRelationshipDescription *description = [relationshipsByName objectForKey:relationshipName]; if (![description isToMany]) { NSLog(@"The relationship is NOT TO MANY!"); [valuesDictionary setObject:[self dataStructureFromManagedObject:[managedObject valueForKey:relationshipName]] forKey:relationshipName]; continue; } NSSet *relationshipObjects = [managedObject valueForKey:relationshipName]; NSMutableArray *relationshipArray = [[NSMutableArray alloc] init]; for (NSManagedObject *relationshipObject in relationshipObjects) { [relationshipArray addObject:[self dataStructureFromManagedObject:relationshipObject]]; } [valuesDictionary setObject:relationshipArray forKey:relationshipName]; } return [valuesDictionary autorelease]; } - (NSArray*)dataStructuresFromManagedObjects:(NSArray*)managedObjects { NSMutableArray *dataArray = [[NSArray alloc] init]; for (NSManagedObject *managedObject in managedObjects) { [dataArray addObject:[self dataStructureFromManagedObject:managedObject]]; } return [dataArray autorelease]; } //method to call for obtaining JSON structure - i.e. public interface to this class - (NSString*)jsonStructureFromManagedObjects:(NSArray*)managedObjects { NSLog(@"-------------> just before running the recursive method"); NSArray *objectsArray = [self dataStructuresFromManagedObjects:managedObjects]; NSLog(@"-------------> just before running the serialiser"); NSString *jsonString = [[CJSONSerializer serializer] serializeArray:objectsArray]; return jsonString; } - (NSManagedObject*)managedObjectFromStructure:(NSDictionary*)structureDictionary withManagedObjectContext:(NSManagedObjectContext*)moc { NSString *objectName = [structureDictionary objectForKey:@"ManagedObjectName"]; NSManagedObject *managedObject = [NSEntityDescription insertNewObjectForEntityForName:objectName inManagedObjectContext:moc]; [managedObject setValuesForKeysWithDictionary:structureDictionary]; for (NSString *relationshipName in [[[managedObject entity] relationshipsByName] allKeys]) { NSRelationshipDescription *description = [[[managedObject entity]relationshipsByName] objectForKey:relationshipName]; if (![description isToMany]) { NSDictionary *childStructureDictionary = [structureDictionary objectForKey:relationshipName]; NSManagedObject *childObject = [self managedObjectFromStructure:childStructureDictionary withManagedObjectContext:moc]; [managedObject setValue:childObject forKey:relationshipName]; continue; } NSMutableSet *relationshipSet = [managedObject mutableSetValueForKey:relationshipName]; NSArray *relationshipArray = [structureDictionary objectForKey:relationshipName]; for (NSDictionary *childStructureDictionary in relationshipArray) { NSManagedObject *childObject = [self managedObjectFromStructure:childStructureDictionary withManagedObjectContext:moc]; [relationshipSet addObject:childObject]; } } return managedObject; } //method to call for obtaining managed objects from JSON structure - i.e. public interface to this class - (NSArray*)managedObjectsFromJSONStructure:(NSString *)json withManagedObjectContext:(NSManagedObjectContext*)moc { NSError *error = nil; NSArray *structureArray = [[CJSONDeserializer deserializer] deserializeAsArray:[json dataUsingEncoding:NSUTF32BigEndianStringEncoding] error:&error]; NSAssert2(error == nil, @"Failed to deserialize\n%@\n%@", [error localizedDescription], json); NSMutableArray *objectArray = [[NSMutableArray alloc] init]; for (NSDictionary *structureDictionary in structureArray) { [objectArray addObject:[self managedObjectFromStructure:structureDictionary withManagedObjectContext:moc]]; } return [objectArray autorelease]; } @end

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• building median for each string in IList<IDictionary<string, double>>

  - by Oliver

  Actually i have a little brain bender and and just can't find the right direction to get it to work: Given is an IList<IDictionary<string, double>> and it is filled as followed: Name|Value ----+----- "x" | 3.8 "y" | 4.2 "z" | 1.5 ----+----- "x" | 7.2 "y" | 2.9 "z" | 1.3 ----+----- ... | ... To fill this up with some random data i used the following methods: var list = CreateRandomPoints(new string[] { "x", "y", "z" }, 20); This will work as followed: private IList<IDictionary<string, double>> CreateRandomPoints(string[] variableNames, int count) { var list = new List<IDictionary<string, double>>(count); list.AddRange(CreateRandomPoints(variableNames).Take(count)); return list; } private IEnumerable<IDictionary<string, double>> CreateRandomPoints(string[] variableNames) { while (true) yield return CreateRandomLine(variableNames); } private IDictionary<string, double> CreateRandomLine(string[] variableNames) { var dict = new Dictionary<string, double>(variableNames.Length); foreach (var variable in variableNames) { dict.Add(variable, _Rand.NextDouble() * 10); } return dict; } Also i can say that it is already ensured that every Dictionary within the list contains the same keys (but from list to list the names and count of the keys can change). So that's what i got. Now to the things i need: I'd like to get the median (or any other math aggregate operation) of each Key within all the dictionaries, so that my function to call would look something like: IDictionary<string, double> GetMedianOfRows(this IList<IDictionary<string, double>> list) The best would be to give some kind of aggregate operation as a parameter to the function to make it more generic (don't know if the func has the correct parameters, but should imagine what i'd like to do): private IDictionary<string, double> Aggregate(this IList<IDictionary<string, double>> list, Func<IEnumerable<double>, double> aggregator) Also my actual biggest problem is to do the job with a single iteration over the list, cause if within the list are 20 variables with 1000 values i don't like to iterate 20 times over the list. Instead i would go one time over the list and compute all twenty variables at once (The biggest advantage of doing it that way would be to use this also as IEnumerable<T> on any part of the list in a later step). So here is the code i already got: public static IDictionary<string, double> GetMedianOfRows(this IList<IDictionary<string, double>> list) { //Check of parameters is left out! //Get first item for initialization of result dictionary var firstItem = list[0]; //Create result dictionary and fill in variable names var dict = new Dictionary<string, double>(firstItem.Count); //Iterate over the whole list foreach (IDictionary<string, double> row in list) { //Iterate over each key/value pair within the list foreach (var kvp in row) { //How to determine median of all values? } } return dict; } Just to be sure here is a little explanation about the Median.

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• Recognize objects in image

  - by DoomStone

  Hello I am in the process of doing a school project, where we have a robot driving on the ground in between Flamingo plates. We need to create an algorithm that can identify the locations of these plates, so we can create paths around them (We are using A Star for that). So far have we worked with AForged Library and we have created the following class, the only problem with this is that when it create the rectangles dose it not take in account that the plates are not always parallel with the camera border, and it that case will it just create a rectangle that cover the whole plate. So we need to some way find the rotation on the object, or another way to identify this. I have create an image that might help explain this Image the describe the problem: http://img683.imageshack.us/img683/9835/imagerectangle.png Any help on how I can do this would be greatly appreciated. Any other information or ideers are always welcome. public class PasteMap { private Bitmap image; private Bitmap processedImage; private Rectangle[] rectangels; public void initialize(Bitmap image) { this.image = image; } public void process() { processedImage = image; processedImage = applyFilters(processedImage); processedImage = filterWhite(processedImage); rectangels = extractRectangles(processedImage); //rectangels = filterRectangles(rectangels); processedImage = drawRectangelsToImage(processedImage, rectangels); } public Bitmap getProcessedImage { get { return processedImage; } } public Rectangle[] getRectangles { get { return rectangels; } } private Bitmap applyFilters(Bitmap image) { image = new ContrastCorrection(2).Apply(image); image = new GaussianBlur(10, 10).Apply(image); return image; } private Bitmap filterWhite(Bitmap image) { Bitmap test = new Bitmap(image.Width, image.Height); for (int width = 0; width < image.Width; width++) { for (int height = 0; height < image.Height; height++) { if (image.GetPixel(width, height).R > 200 && image.GetPixel(width, height).G > 200 && image.GetPixel(width, height).B > 200) { test.SetPixel(width, height, Color.White); } else test.SetPixel(width, height, Color.Black); } } return test; } private Rectangle[] extractRectangles(Bitmap image) { BlobCounter bc = new BlobCounter(); bc.FilterBlobs = true; bc.MinWidth = 5; bc.MinHeight = 5; // process binary image bc.ProcessImage( image ); Blob[] blobs = bc.GetObjects(image, false); // process blobs List<Rectangle> rects = new List<Rectangle>(); foreach (Blob blob in blobs) { if (blob.Area > 1000) { rects.Add(blob.Rectangle); } } return rects.ToArray(); } private Rectangle[] filterRectangles(Rectangle[] rects) { List<Rectangle> Rectangles = new List<Rectangle>(); foreach (Rectangle rect in rects) { if (rect.Width > 75 && rect.Height > 75) Rectangles.Add(rect); } return Rectangles.ToArray(); } private Bitmap drawRectangelsToImage(Bitmap image, Rectangle[] rects) { BitmapData data = image.LockBits(new Rectangle(0, 0, image.Width, image.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb); foreach (Rectangle rect in rects) Drawing.FillRectangle(data, rect, Color.Red); image.UnlockBits(data); return image; } }

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• Layout problem: scrollview inside a table, inside a custom dialog

  - by Sean

  I have a layout problem which I can't fix. I've looked through many posts on here, and mine seems to be unique enough to post a question. I've created a custom Dialog which programmatically creates a 3 row table. The top and bottom rows have text, while the middle row contains a ScrollView, which contains a LinearLayout. That LinearLayout then contains some number of views (TextView in this example). Since I'm doing this programmatically, see the XML pseudocode below, and the actual code below that. What I would like to happen, is that when the height of the contained content in the LinearLayout gets too big, the ScrollView does its job, and the header and footer TextView's are always visible. The problem is that when the dialog gets big enough, the ScrollView appears to take over the whole dialog, and my footer TextView disappears off the screen. What can I do to make sure the footer TextView never disappears, but the ScrollView can still function? See the following image links: Footer visible on the left, gone on the right: http://img690.imageshack.us/i/screenshotss.png/ <TableLayout> <TableRow> <TextView> </TableRow> <TableRow> <ScrollView> <LinearLayout> <TextView/> <TextView/> <TextView/> ... </LinearLayout> </ScrollView> </TableRow> <TableRow> <TextView> </TableRow> </TableLayout> Here's the code: public class DialogScrollTest extends Dialog { public DialogScrollTest(Context ctx){ super(ctx); setTitle(""); requestWindowFeature(Window.FEATURE_NO_TITLE); TableLayout table = new TableLayout(ctx); TableRow row; TextView text; row = new TableRow(ctx); { text = new TextView(ctx); text.setText("TestTop"); row.addView(text); } table.addView(row); row = new TableRow(ctx); { ScrollView scroll = new ScrollView(ctx); { LinearLayout linear = new LinearLayout(ctx); linear.setOrientation(LinearLayout.VERTICAL); for(int t=0; t<32; ++t){ text = new TextView(ctx); text.setText("TestScroll"); linear.addView(text); } scroll.addView(linear); } row.addView(scroll); } table.addView(row); row = new TableRow(ctx); { text = new TextView(ctx); text.setText("TestBottom"); row.addView(text); } table.addView(row); this.setContentView(table); } }

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