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• Website latency and bad tcp packets

  - by Mistero Lupo

  I have multiple websites hosted on a Linode VPS and I'm having an issue with one of them: every page that I try to load has about 10 seconds latency. Apache logs are clean and the other websites on the same machine are running well. At a first glance I tought it was a memory problem since the VPS has got only 512M, but from the linode dashboard CPU and Disk I/O are normal. Anyway here we have the ram status: $ free -m total used free shared buffers cached Mem: 487 463 23 0 2 55 -/+ buffers/cache: 404 82 Swap: 255 155 100 Only 23M free, but if it was a memory problem why other websites are going as usual? I took a live capture with wireshark, and there are some duplicates SYN ACK packets just before the 10 seconds gap. I'm out of ideas, looking for some clues. Wireshark live capture screenshot As you can see from the image, the gap is after the last bad tcp. Thank you in advance. UPDATE I've checked Apache2 logs in debug error level, and this is where something is appening: 151.97.156.191 - - [14/Nov/2012:11:19:40 +0100] [www.fmaisi.it/sid#7f32c625a220][rid#7f32c6801578/subreq] (3) [perdir /home/fmaisi/sites/www.fmaisi.it/public_html/] applying pattern '^index\.php$' to uri 'index.php' 151.97.156.191 - - [14/Nov/2012:11:19:40 +0100] [www.fmaisi.it/sid#7f32c625a220][rid#7f32c6801578/subreq] (1) [perdir /home/fmaisi/sites/www.fmaisi.it/public_html/] pass through /home/fmaisi/sites/www.fmaisi.it/public_html/index.php 151.97.156.191 - - [14/Nov/2012:11:19:54 +0100] [www.fmaisi.it/sid#7f32c625a220][rid#7f32c6537c78/initial] (3) [perdir /home/fmaisi/sites/www.fmaisi.it/public_html/] strip per-dir prefix: /home/fmaisi/sites/www.fmaisi.it/public_html/wp-content/plugins/wp-filebase/wp-filebase_css.php -> wp-content/plugins/wp-filebase/wp-filebase_css.php 151.97.156.191 - - [14/Nov/2012:11:19:54 +0100] [www.fmaisi.it/sid#7f32c625a220][rid#7f32c6537c78/initial] (3) [perdir /home/fmaisi/sites/www.fmaisi.it/public_html/] applying pattern '^index\.php$' to uri 'wp-content/plugins/wp-filebase/wp-filebase_css.php' As you can see there is a gap of 14 seconds after the pass through of index.php. Any suggestions? I'm out of ideas again.

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• Virtual host doesn't read .htaccess

  - by Charlie

  I just created virtual host: <VirtualHost myvirtualhost:80> ServerAdmin webmaster@myvirtualhost ServerName myvirtualhost DocumentRoot /home/myname/sites/public_html <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /home/myname/sites/public_html/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> It works, but it cant read .htacces file in public_html: DirectoryIndex otherindex.php I tried change all AllowOverride to All, but I get 500 error. How can I fix this ? thanks.

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• Mercurial hook fails on Windows

  - by Nick Hodges

  I am trying to use the headcount hook (https://bitbucket.org/dgc/headcount/overview) with my main develop repository. I pulled the code and placed it in C:\Python26\Lib\site-packages. I made the following entries into my hgrc file: [hooks] pretxnchangegroup.headcount = python:headcount.headcount.hook [headcount] push_ok = * commit_ok = * warnmsg = %(headcount)d new heads detected. You may not push new heads to this repository. debug = False All this is as per the install instructions. I then cloned the repository, created a branch, committed a change to that branch, and then issued: hg push -f as a test. However, this fails with: C:\junk\htmlwriter>hg push -f pushing to c:\code\htmlwriter searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files transaction abort! rollback completed abort: pretxnchangegroup.headcount hook is invalid (import of "headcount.headcou nt" failed) I then ran this: C:\Python26>python c:\Python26\Lib\site-packages\headcount\headcount.py Traceback (most recent call last): File "c:\Python26\Lib\site-packages\headcount\headcount.py", line 2, in <modul e> import mercurial.node ImportError: No module named mercurial.node I'm far from a python expert, so can someone help me figure out how to get the headcount hook to run inside my mercurial environment? Details: Windows 7, Mercurial 1.7.2, TortoiseHg 1.1.7

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• IIS7ASP.Net 4.0 - 404 errors only for external clients

  - by dmcgiv

  recently we moved an ASP.Net 3.5 website to 4.0 (integrated mode) and when we deployed to the clients server (Windows Server 2008 Web edition) we notice that some .aspx pages are serving 404 errors. What is strange is that 1) the pages exist 2) if you browse from the server itself the page is served as normal, only external clients get the 404 3) it's the default 404 error page not the one configured in the web.config 4) it only happens for some .aspx pages, and I've not been able to establish a link between the pages that are not being served externally. We are using a URL rewriter module which I first thought may be at fault but then realised that only some of the failing pages are being rewritten. I've also tested removing the http module and the problem still persists. As everything is working as expected when logged onto the server I was thinking it my be some sort of permission issue, but why would it only affect a few pages? I turned on failed request tracking and the debug files are being generated with the expected 404 error, although at the moment I'm not sure what most of the data means so can't decipher what's going on internally. I'd really appreciate some help with this one.

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• No outbound internet connection after restarting CentOS 6.3

  - by wnstnsmth

  After restarting a headless CentOS 6.3 machine, it lost outbound internet connectivity, i.e. I can still connect to the server via SSH (ssh root@**.126.18.56), but stuff such as ping google.com gives google.com: unknown host, and yum list some_package gives a lot of network errors. This is what ifconfig gives: eth0 Link encap:Ethernet HWaddr 00:25:90:78:2D:5D inet addr:**.126.18.56 Bcast:**.126.18.255 Mask:255.255.255.0 inet6 addr: fe80::225:90ff:fe78:2d5d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:75594 errors:0 dropped:0 overruns:0 frame:0 TX packets:787 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7074741 (6.7 MiB) TX bytes:144391 (141.0 KiB) Interrupt:20 Memory:f7a00000-f7a20000 eth1 Link encap:Ethernet HWaddr 00:25:90:78:2D:5C UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interrupt:16 Memory:f7900000-f7920000 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:6 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:504 (504.0 b) TX bytes:504 (504.0 b) I have absolutely no clue how to debug this, and I find it very strange since I can still connect via ssh. EDIT: Weirdly, /etc/resolv.conf does not contain any entries, or none that I can make sense of: # Generated by NetworkManager search sui-inter.net # No nameservers found; try putting DNS servers into your # ifcfg files in /etc/sysconfig/network-scripts like so: # # DNS1=xxx.xxx.xxx.xxx # DNS2=xxx.xxx.xxx.xxx # DOMAIN=lab.foo.com bar.foo.com So is it possible that rebooting the server erased that file? It worked before at least! And how do I solve this? By the way, pinging an IP address works.

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• sporadic routing to another website when opening a common url

  - by user226098

  I have a strange problem in our office: Sometimes when opening a url from one of our projects random url in any browser not the right website shows up but some other website. In most of the cases it redirects to google.com with some parameters like https://www.google.de/?gfe_rd=cr&ei=krOOU8_kGcSKswadyYDQBw&gws_rd=ssl or just the ugly google 404 page). But today it remains on the origial url but shows up the the content of http://debug.netdna-cdn.com/. This happens about 1 time a week and for no apparent reason. Even stranger it only occurs on a single pc in the network. It now happens on two different computers in the network. Both use windows 8. The problem cannot be fixed by clearing the browser cache but by rebooting the pc or using ipconfig /flushdns. So I think it has something to do with the dns cache of the machine. But I have no idea what the reason is for this and how i can figure out how to solve it. Any ideas?

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• lighttpd domains and url matching

  - by Manuel

  I'm trying to configure lighttpd so that: www.domain1.org/admin uses config1 any other URL on www.domain1.org uses config2 any url on www.domain2.org uses config2 So basically, domain1 and domain2 should use the same configuration except for when domain1 is accessed via an URL that starts with /admin I tried so far a number of variations, including this one: $HTTP["host"] =~ "domain1.org" { $HTTP["url"] =~ "^/admin" { // config1 alias.url = ("/media/admin" => "/usr/share...", "/static" => "/var/www/...") url.rewrite-once = ( "^(/media/admin.*)$" => "$1", "^(/static.*)$" => "$1", "^/favicon\.ico$" => "/media/favicon.ico", "^(/.*)$" => "/application.fcgi$1", ) server.document-root="/var/www/application" fastcgi.debug = 1 fastcgi.server = ( "/application.fcgi" => ( "main" => ( "socket" => "/var/www/application/application.sock", "check-local" => "disable", ) ), ) } else $HTTP["url"] !~ "^/admin" { // config2 } $HTTP["host"] !~ "domain1.org" { // config2 } But no matter what, accessing domain1.org/admin yields a 404. Is there anything that I am missing?

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• How to divert traffic based on hostname using HAProxy?

  - by Bosky

  I've had some initial success with HAProxy setting up a bunch of app servers listening on various other ports. I now have another webserver listening on one port, and i'd like to what changes to make to my config to flow traffic by hostname as well. The following is the current setup, assuming: my apache webserver is running at examplecom:8001 my bunch of app servers 0.0.0.0:8081, 0.0.0.0:8082 , 0.0.0.0:8083 global log 127.0.0.1 local0 log 127.0.0.1 local1 notice maxconn 4096 debug #quiet #user haproxy #group haproxy defaults log global mode http option httplog option dontlognull retries 3 redispatch maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 listen appservers 0.0.0.0:80 mode http balance roundrobin option httpclose option forwardfor #option httpchk HEAD /check.txt HTTP/1.0 server inst1 0.0.0.0:8081 cookie server01 check inter 2000 fall 3 server inst2 0.0.0.0:8082 cookie server02 check inter 2000 fall 3 server inst3 0.0.0.0:8083 cookie server01 check inter 2000 fall 3 server inst4 0.0.0.0:8084 cookie server02 check inter 2000 fall 3 capture cookie vgnvisitor= len 32 (any other comments on the ^ setup are welcome.) Now I'd like to continue the same above, but in addition in case - if the hostname is myspecialtopleveldomain<dot>com, then would like to flow traffic to example<dot>com:8001 ~B

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• troubleshooting postifx -> exchange connection issues

  - by Systemspoet

  I have three linux-based mail routers that run postfix and relay mail to our on-premise exchange server as well as to outlook.com, splitting the mail based on ldap atttributes. What I've observed sporadically since upgrading this spring from Exchange 2007 to 2010 is that all three of the mail relays will, for about 20 minutes, fail to connect to exchange. Postfix logs it as "lost connection with exchange.contosso.edu" ; this problem almost always occurs to all three mail relays at the same time, and lasts for slightly under 20 minutes. If I can catch it while it's occuring, and I manually do "telnet exchange.contosso.edu 25" from one mail relay and force a message through (helo, mail from, rcpt to, data, etc), then it clears that relay up. The exchange "server" is actually two machines with the HT role on them, load balanced via windows NLB. I've worked pretty hard to figure out what's happening from the postfix side and I can't see any evidence of any misbehavior. My question is, how do I attack the problem from the exchange side? Is there a connection log, or a debug setting, or something I can do to log all of the inbound connections and tell me what's causing exchange to drop them?

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• Varnish going sick

  - by junke1990

  I'm having trouble with Varnish, it works for a couple of views and then just goes sick... The weird thing is that it does work for about 20 or 30 requests. If I call apache directly it works fine. I'm running Varnish Version: 3.0.3-1 on Debian Squeeze and, for now, Apache on port 80 and Varnish on port 8080 on the same server.. I'm using https://github.com/mattiasgeniar/varnish-3.0-configuration-templates as base for my VCLs and modified the VCLs to support Concrete5. Anyone any clue on how I should debug this? backend default { .host = "127.0.0.1"; .port = "80"; .connect_timeout = 1.5s; .first_byte_timeout = 45s; .between_bytes_timeout = 30s; .probe = { .url = "/"; .timeout = 1s; .interval = 10s; .window = 10; .threshold = 8; } } LOG 0 CLI - Rd ping 0 CLI - Wr 200 19 PONG 1353791312 1.0 0 CLI - Rd ping 0 CLI - Wr 200 19 PONG 1353791315 1.0 0 Backend_health - default Still sick 4--X-R- 0 8 10 0.000689 0.000000 HTTP/1.1 301 Moved Permanently (the 301 is because I check for www.)

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• Upstart multiple instances of service not working.

  - by Dax

  I started playing with MongoDB on Lucid. Now I would like to run a DB and Config server on the same box. They both use the same binary to launch, but with different config files and running on different ports. All directories for log and lib is split so one goes to mongodb and the other to mongoconf. Each process can be started without any problems on their own. start mongodb stop mongodb start mongoconf stop mongoconf But if I try to start both, the second one would just start and exit. Using 'initctl log-priority debug' I got the following in the logs. Jan 6 12:44:12 mongo4 init: event_finished: Finished started event Jan 6 12:44:12 mongo4 init: job_process_handler: Ignored event 1 (1) for process 5690 Jan 6 12:44:12 mongo4 init: mongoconf (mongoconf) main process (5690) terminated with status 1 Jan 6 12:44:12 mongo4 init: mongoconf (mongoconf) goal changed from start to stop Jan 6 12:44:12 mongo4 init: mongoconf (mongoconf) state changed from running to stopping man 5 init shows that you can use instance names to differentiate the two. I tried using 'instance mongoconf' in the on upstart script and 'instance mongodb' in the other one, and it still fails. I can manually start the other process, so there is definitely no conflicts on port numbers or directories. Any ideas on what to try or how to get output on why it is 'terminated with status 1'? Thanx

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• Constructor and Destructor of a singleton object called twice

  - by Bikram990

  I'm facing a problem in singleton object in c++. Here is the explanation: Problem info: I have a 4 shared libraries (say libA.so, libB.so, libC.so, libD.so) and 2 executable binary files each using one another shared library( say libE.so) which deals with files. The purpose of libE.so is to write data into a file and if the executable restarts or size of file exceeds a certain limit it is zipped and a new file is created with time stamp in name. It is using singleton object. It exports a handler class for getting and using singleton. Compressing only happens in the above said two cases. The user/loader executable can specify the starting name of file only no other control is provided by handler class. libA.so, libB.so, libC.so and libD.so have almost same behavior. They all have a class and declare and object of an handler which gets the instance of the singleton in libE.so and uses it for further purpose. All these libraries are linked to two executable binary files. If only one of the two executable runs then its fine, But if both executable runs one after other then the file of the first started executable gets compressed. Debug info: The constructor and destructor of the singleton object is called twice.(for each executable) The object of singleton is a static object and never deleted. The executable is not able to exit/return gives: glibc detected * (exe1 or exe2): double free or corruption (!prev): some_addr * Running with binaries valgrind gives that the above error is due to the destructor of the singleton object. Thanks

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• Windows XP VM on VMWare ESXi 4.1 "pausing" / blocked occasionally

  - by FelixD

  We have an issue with Windows XP SP3 VMs on VMWare ESXi 4.1.0 (the free version): They sometimes seem to "pause" for several minutes. This happens rarely (maybe once a month per VM, at least noticed only that often), but still is an issue for us. It happens for three different but similar VMs on three pretty different hosts (different hardware). I have the feeling that the "pausing" is not actually the CPU blocking, but probably the harddisks, but not 100% sure. The servers have one IDE disk (C:) and one SCSI (D:) and it might be either of the two. I have seen scheduled tasks simply not starting for up to 9 minutes and then running normally again with normal speed. They were totally blocked. This is not a load issue, the VMWare hosts have average load and the VMs in question already have reserved CPU resources plus high priorities for CPU and disk. The Windows boxes run mainly MySQL, Tomcat, FileZilla server, Cygwin stuff, Java + R applications, VMWare client, Elusiva Terminal Server pro, Nagios client. Not sure if this might be related with any of that software (e.g. Elusiva). Trying to debug this, there was nothing visible in Windows Event log, other logs in C:\Windows, VMWare events etc. Unfortunately the vmware.log file ends with "Log throttled". We found that we ran into 2 VMWare bugs there: The VMWare client writes lots on bogus messages in the vmware.log, which we now disabled (log level error setting) plus the bug that VMWare does not unthrottle the log (at least so far despite VM reboots). I know there is not much guidance and that may also be the reason why I so far didn't find anything related on the web or on ServerFault, but maybe some of this rings a bell with someone? Or please direct me to what more info to post. I hope that the vmware.logs get unthrottled eventually (can't easily restart the hosts at the moment). Thanks for any input!

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• SVN very slow over HTTP (seems auth related)

  - by Sydius

  I'm using SVN version 1.6.6 (r40053) via the command-line in Ubuntu 10.04 and connecting to a remote repository over HTTP that is in the local network. For a while, it worked fine, but has recently become very slow for any operation that requires communication with the repository, however it does eventually work after several minutes (~3m for svn up). Looking at Wireshark, it appears to be taking a full minute between the HTTP auth denied and the subsequent request containing credentials. The issue is local to my machine because other coworkers running Ubuntu are not having the issue and I've tried using my credentials from another machine and it was very fast. I tried deleting the .subversion folder in my home directory and checking everything out fresh, but it didn't help. Update: I think it's auth related. When I check out SVN repositories off of the Internet over HTTP (from Google Code, for example), everything is very fast until I do something that requires a password. Before prompting for the password for the first time, it stalls for at least a minute. Update 2: I set the neon-debug-mask in the SVN settings (in /etc/subversion/servers under [Global]) to 138 and it seems to spending a lot of time on 'auth: Trying Basic challenge...'

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• Can't start my phpMyAdmin

  - by vrynxzent

  i am creating my own portable server but i can't make it to run the phpMyAdmin, the mysql, php and apache is running except for phpMyAdmin. When i check Apache's error log, it states [Fri Nov 09 08:54:37 2012] [warn] pid file F:/Drive WebServer/Drive WebServer/bin/Debug/Apache2bak/logs/httpd.pid overwritten -- Unclean shutdown of previous Apache run? PHP Warning: PHP Startup: Unable to load dynamic library './php_mysql.dll' - The specified module could not be found.\r\n in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library './php_mysqli.dll' - The specified module could not be found.\r\n in Unknown on line 0 [Fri Nov 09 08:54:37 2012] [notice] Apache/2.0.64 (Win32) PHP/5.2.17 configured -- resuming normal operations [Fri Nov 09 08:54:37 2012] [notice] Server built: Oct 18 2010 01:36:23 [Fri Nov 09 08:54:37 2012] [notice] Parent: Created child process 6784 i manually assign the exact path for this F:/php/ext/php_mysql.dll PHP Warning: PHP Startup: Unable to load dynamic library 'F:/php/ext/php_mysql.dll' - The specified module could not be found.\r\n in Unknown on line 0 but still the same error. i set this option in php.ini extension_dir = "./" another error goes pops out It says libmysql.dll is missing. PHP Version : 5.2.17 Any help would be appreciated. ;)

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• Nagios escalation debugging

  - by Oesor

  I'm having some issues with escalations happening properly and I'm not sure if it's because of my config or because the nagios binary is nonstandard and something may be broken. I've got little experience with nagios, and just want to make sure this is being set appropriately. Should the following config file definition allow the escalations to take over and increment the notification interval as expected? Is there somewhere else in the config files I should be looking at to figure out what's going on? I've enabled debug 32 in the config and it's simply spitting out 'Host notification will NOT be escalated.' for each notification. The configuration does pass the pre flight check with no issues, and reports that it's parsing the three host escalations in the config. # test host definition define host { host_name test alias test address 10.0.0.10 hostgroups test check_interval 0 retry_interval 1 max_check_attempts 2 flap_detection_enabled 0 icon_image windows.png icon_image_alt LOGO - Windows vrml_image windows.png statusmap_image windows.png action_url /info/host/275 check_period 24x7 contact_groups hostgroup15_servicegroup1,hostgroup15_servicegroup10,hostgroup15_servicegroup13,hostgroup15_servicegroup14,hostgroup15_servicegroup2,hostgroup15_servicegroup3,hostgroup15_servicegroup4,hostgroup15_servicegroup42,hostgroup15_servicegroup45,hostgroup15_servicegroup46,hostgroup15_servicegroup47,hostgroup15_servicegroup5,hostgroup15_servicegroup8,hostgroup15_servicegroup9,ov_monitored_by_master check_command check_host_15!-H $HOSTADDRESS$ -t 3 -w 500.0,80% -c 1000.0,100% parents nagios notifications_enabled 1 notification_interval 3 notification_period 24x7 notification_options u,d,r use host-global } define hostescalation{ host_name test first_notification 3 last_notification 4 notification_interval 10 contact_groups hostgroup15_servicegroup1,hostgroup15_servicegroup10,hostgroup15_servicegroup13,hostgroup15_servicegroup14,hostgroup15_servicegroup2,hostgroup15_servicegroup3,hostgroup15_servicegroup4,hostgroup15_servicegroup42,hostgroup15_servicegroup45,hostgroup15_servicegroup46,hostgroup15_servicegroup47,hostgroup15_servicegroup5,hostgroup15_servicegroup8,hostgroup15_servicegroup9,ov_monitored_by_master } define hostescalation{ host_name test first_notification 4 last_notification 5 notification_interval 30 contact_groups hostgroup15_servicegroup1,hostgroup15_servicegroup10,hostgroup15_servicegroup13,hostgroup15_servicegroup14,hostgroup15_servicegroup2,hostgroup15_servicegroup3,hostgroup15_servicegroup4,hostgroup15_servicegroup42,hostgroup15_servicegroup45,hostgroup15_servicegroup46,hostgroup15_servicegroup47,hostgroup15_servicegroup5,hostgroup15_servicegroup8,hostgroup15_servicegroup9,ov_monitored_by_master } define hostescalation{ host_name test first_notification 5 last_notification 0 notification_interval 240 contact_groups hostgroup15_servicegroup1,hostgroup15_servicegroup10,hostgroup15_servicegroup13,hostgroup15_servicegroup14,hostgroup15_servicegroup2,hostgroup15_servicegroup3,hostgroup15_servicegroup4,hostgroup15_servicegroup42,hostgroup15_servicegroup45,hostgroup15_servicegroup46,hostgroup15_servicegroup47,hostgroup15_servicegroup5,hostgroup15_servicegroup8,hostgroup15_servicegroup9,ov_monitored_by_master }

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• (squid): failed to find or read error text file.

  - by adam

  There is something in our ERR_NO_RELAY that is causing this error to be logged and for the squid process to fail on start up. I can't show you the exact content of the file but I can tell you It has several lines of JavaScript When we remove the JavaScript, the problem goes away. This same file does not cause any issues other 3 instances of squid that we have running internally. All instances of squid came from the same VM images so they should be the same. We are unable to reproduce this issue except on the one box and we are unable to debug more on this box right now because it is running in production. I know these files are interpreted so squid can replace certain values available in the session so it may be that a syntax error caused this issue. That does not explain why we cannot reproduce it on other (virtually the same) images. One difference is that the instance of squid that has the issue was under load when the issue occurred. Any suggestions/insight would be appreciated. thanks!

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• php mail() function painfully slow on local development machine

  - by Michael B

  Background: If you have set up a local apache server for development purposes you may have run into the problem where sendmail takes a long time (at least one minute) to send emails. This is extremely frustrating if you are trying to debug a problem with an email you have generated. There are several forum posts on the internet that discuss this problem. However, none of theme described what to do in enough detail for my limited knowledge. Here are the steps that worked for me: 1) find your hostname (in case you've forgotten it) using this command: :~$ cat /hosts/hostname myhostname 2) edit the file /etc/hosts and make sure the first line is the following: 127.0.0.1 localhost.localdomain localhost myhostname 3) edit the sendmail configuration file ( /etc/mail/sendmail.cf in Ubuntu) and Uncomment the line #O HostsFile=/etc/hosts 4) Restart the computer. The computer should boot up much faster now and the mail() function should return almost immediately. HOWEVER, the emails won't actually be sent unless you follow step 5. 5) You must new use the sendmail '-f' option whenever using the mail function. For example: mail('[email protected]', 'the subject', 'the message', null, '[email protected]'); My question for my fellow serverfaulters is: What further changes can be made so that I don't have to use the sendmail -f option? Although it's not very hard to add the -f option, it is a problem when your CMS (such as Drupal) does not use the -f option when sending mail. You would need to hack a core module to add this option.

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• Passive mode FTP file download hangs from specific machine

  - by chiptuned

  I have a server which is an AWS instance that just cannot download files from a specific FTP server. I can connect to the FTP server fine and run some commands, but when I request a file it just hangs. Here is the debug output of the base linux ftp client after login: ---> SYST 215 UNIX Type: Apache FtpServer Remote system type is UNIX. ftp> get outgoing/catalog.gz catalog.gz local: catalog.gz remote: outgoing/catalog.gz ---> PASV 227 Entering Passive Mode (64,156,167,125,135,191) ---> RETR outgoing/catalog.gz 150 File status okay; about to open data connection. Thats it. Then it just sits there and nothing transfers. I have verified that a data connection is made but the client gets no data. ? ss -nt dst 64.156.167.125 State Recv-Q Send-Q Local Address:Port Peer Address:Port ESTAB 0 0 10.185.147.150:41190 64.156.167.125:21 ESTAB 0 0 10.185.147.150:48871 64.156.167.125:48557 The FTP server is not in my control and downloads from other FTP servers in passive mode have worked. Active mode does not work as the system is behind a firewall. Every FTP client I've tried has the same problem. The download works from other systems, even from other AWS instances I have with the same Security Group. Not necessarily the same distro or config though. I understand it may be some issue on the server side, but I want to know what it is about my particular machine where the transfer hangs and where on every other machine I can get my hands on, it works. Please let me know what the culprit on the client side could be or ideas on what else to look at.

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• Apache Virtualhosts with PHP and custom logs - how to isolate PHP errors?

  - by Repox

  I'm trying to setup a simple hosting enviroment for my application on an Ubuntu server. I created a virtualhost like this: <VirtualHost *:80> ServerAdmin [email protected] ServerName www.example.com ServerAlias example.com DocumentRoot /home/owner/example.com/docs <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /home/owner/example.com/docs/> Options -Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /home/owner/example.com/logs/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /home/owner/example.com/logs/access.log combined php_flag log_errors on php_value error_log /home/owner/example.com/logs/php-error.log </VirtualHost> Now, my problem is that PHP errors and warnings are thrown in the error.log - not the php-error.log as I was hoping. How can achieve this?

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• Printer irregularly producing garbage output

  - by John Gardeniers

  Every now and then instead of getting the proper output we get numerous pages, mostly with just a single line, of output which appears to be the raw PCL. My theory is that this happens when the first byte or two of the document is somehow not received by the printer, which then doesn't know how to interpret the rest and does it's best by spitting it out as text. This is a problem I've seen many times over the years but has been popping up more often since we upgraded to Win 7 64 bit, which introduced a number of headaches because of the HP lack of real support for 64 bits. It also appears to happen most often when printing PDF files. We have tried several different PDF readers in addition to Adobe's own but that hasn't helped. While we mainly use HP printers, and the problem is not limited to any particular model, I've also seen it happen on other brands, albeit to a lesser extent. I've also been unable to discern a difference between printers used via a print server or those connected directly by IP address. It also happens to USB attached printers. Because of the erratic nature of this problem there is precious little I can think of to try and debug it, so I'm after any ideas that might help to eliminate it.

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• How to setup a virtual host in Ubuntu running on Amazon EC2 instance?

  - by Rade

  I have an app that's accessible via 1.2.3.4/myapp. The app is installed in /var/www/myapp. I've set up a subdomain(apps.mydomain.com) that points to 1.2.3.4. I want the server to point to var/www/myapp if I type apps.mydomain.com/myapp, how do I do that? I have experience creating virtual hosts(lots of them) locally but I'm lost because it's now in production and it's a little different. Here's my virtual host config: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName apps.mydomain.com/myapp DocumentRoot /var/www/myapp/public <Directory /> Options FollowSymLinks AllowOverride All </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride All Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> Any idea why I still see the files instead of pointing me to the document root? Just in case someone might ask, the app is based on Laravel 4 framework. It's really bad right now because anyone can access the files from the browser.

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• Is it safe to format this partition?

  - by xanesis4

  On a ubuntu server I own, I am running out of space. When I ran sudo parted /dev/sda -l to find all available drives, I got this: Model: ATA ST31000528AS (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 256MB 255MB primary ext2 boot 2 257MB 1000GB 1000GB extended 5 257MB 1000GB 1000GB logical lvm Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/server--vg-swap_1: 2135MB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 2135MB 2135MB linux-swap(v1) Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/server--vg-root: 998GB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 998GB 998GB ext4 I understand /dev/mapper/server--vg-root is the filesystem, and /dev/sda1 has some stuff related to GRUB. But, what about /dev/sda2 and /dev/sda5? When I tried to mount /dev/sda2, it said that I needed to specify the file system, which according to the table, is nonexistent. So, is it safe to format this with, say ext4 and mount it? Also, when I tried to mount /dev/sd5, it gave me this error: mount: unknown filesystem type 'LVM2_member' I assume it is NOT save to reformat this. If I'm wrong, then that would be great, because I could save some space. Please let me know either way. Thanks in advance! UPDATE: Here is the result of mount: /dev/mapper/server--vg-root on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) /dev/sda1 on /boot type ext2 (rw,acl) /dev/sda1 on /media/hd2 type ext2 (rw)

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• MySQL InnoDB/socket issue on Mac OS X 10.6.4

  - by user55217

  I have an ongoing issue on my Macbook Pro OS X 10.6.4. Intermittently, my MySQL install will not create a socket on startup. Rebooting sometimes, but not always, solves the problem. Deleting the ib* files in /usr/local/mysql/data and then restarting sometimes, but not always, solves the problem. My error logs tell me the following: Plugin InnoDB init function returned error Plugin InnoDB registration as a STORAGE ENGINE failed Can't start server: Bind on TCP/IP port: Address already in use Do you already have another mysqld server running on port: 3306? Aborting It then appears to attempt to start again and generates this error 20 - 30 times: Unable to lock ./ibdata1, error 35 Check that you do not already have another mysqld process using the same InnoDB data or log files Though the socket file is not created, I can connect to my MySQL db directly over localhost. Although, this does not help me from a PHP standpoint. Any thoughts on what I can do to resolve the issue or debug further? I'm at a loss as to where to go from here.

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• I'm having trouble getting my server to appear online.

  - by JMRboosties

  Total newb question I'm sure. First I had installed WAMP (http://www.wampserver.com), and I was able to access my pages from other computers in my router network, and the virtual device used to debug Android programs (the purpose of my having a server). This functionality failed, however, at some point over these past few days. While my own browser displays the pages just fine, other computers, my Android phone (on our room's wifi), and my virtual device are no longer able to connect to my pages. I had not made any changes in the settings. I uninstalled WAMP and installed EasyPHP. However, the problem was not resolved. I know this is rather vague, but does anyone here have an idea of what may have happened? I forwarded both port 80 (I know its the default HTTP port, I did it just to be safe), and now port 8888 which EasyPHP uses. I turned my firewall on my hosting computer off for good measure. I cannot access my pages from neither remote computers or computers using my router. Any ideas you may have on how to resolve this would be awesome, thanks a lot. And if you need anymore info please tell me.

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