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1
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1answer
170 views

Describing `strace` command output

I have php process which could not finish for more then 2 days. root 26511 0.0 1.6 407788 27684 ? Ss Jul09 0:08 /usr/bin/php action.php This is the output from the strace command: ...
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votes
0answers
118 views

Fiddler doesn't work on Windows Server 2012

I can't get Fidller to show any traffic whatsoever when installed on Server 2012 Standard. Any hints on what needs to be enabled or disabled or clicked to make it functional? Just in case, Fiddler ...
12
votes
2answers
756 views

Kernel stack trace to source code lines

Given a kernel stack trace as below, how do you determine the specific line of code where the issue occurred? kernel: [<ffffffff80009a14>] __link_path_walk+0x173/0xfb9 kernel: ...
0
votes
1answer
74 views

APC resets after a few seconds

Got a new server and the host installed APC for me. Reloading apc.php shows that ACP resets itself every 4-6 seconds. Uptime is alyways 0 and hits never go above 3000. The site runs smoothly but if ...
0
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0answers
112 views

Diagnose dump file which causes SQL Server timeouts randomly

My SQL Server gets random timeouts some days causing the server to slow down, sites not to load, and no data coming back from SQL Server. I have this dump file below, and I am having a hard time ...
0
votes
2answers
118 views

How to debug Repository.fetch_changesets runned from ./script/rails runner

For some time I have been updating changesets manually on server with following command's: $ cd /custom/www-data/ $ source /custom/www-data/.rvm/scripts/rvm $ ./script/rails runner ...
0
votes
1answer
30 views

How to watch a file, who accesses or uses [duplicate]

I am looking forward a way to watch a file to get following information Which process does open, read, write it? When? Result. (e.g. can they write on it, or can they read it, etc.) Strace helps ...
0
votes
1answer
210 views

Website goes down for just me. How should I diagnose (what log files to check?) (Nginx + php5-fpm)

Summary I've been running a website on a VPS and I ran into my first bit of downtime (~4 minutes). However the website was only down for me and I can't see anything in the obvious log files. Where ...
1
vote
1answer
459 views

Puppet: class already declared

I'm currently in reorganising the structure of my puppet code to a model, which uses, profiles and roles. I've started with profiles and was testing, but already run into issues :/ In my node ...
0
votes
0answers
54 views

Apache time-outs

I need some help to troubleshoot Apache time-outs. Could you please advise what tolls/steps I can use to troubleshoot this further? Details: CentOS 6.4 Apache 2.2.15 Requests just hang: $ curl -I ...
0
votes
1answer
87 views

Where should I start to try and debug a CPU spike and timeout when logging in to a Moodle site?

apologies for the newbie nature of this question .. I am a web developer though don't have too much experience maintaining servers or debugging and fixing performance issues. I have a Moodle site ...
0
votes
1answer
85 views

tail command not updating output for debug files

I know that tail -f /var/log/messages will be keep updating on screen as the contents of file gets updated. But when I tried the same thing with a debug file system's file it is not working , any ...
0
votes
1answer
1k views

How to analyze Debug Diagnostic Tool v2.0 dumps on 2003 Server x86

Debug Diagnostic Tool v1.2 comes with a log analyzer (sometimes). I can't find the analyzer component in Debug Diagnostic 2.0 when installed on 2003 Server x86. What's the recommended way to ...
2
votes
1answer
669 views

How do you disable Just-in-Time debugging messages?

In a relatively new installation of Windows Server 2008 R2, there are occasional popup messages about Just-in-time debugging. These may come up in w3wp.exe when a search bot accesses an aspx ...
0
votes
0answers
72 views

How do I get debug symbols for the Python 2.7.5 executable installed from the “python-2.7_1,2” port?

I have a runaway process to debug. The problem only manifests on two FreeBSD 9.1 servers I'm using. I have a core file that might contain useful information. My first two thoughts were to attach to ...
2
votes
2answers
67 views

View headers of HTML requests to apache

Is there a good way of viewing a detailed version of incoming requests to apache? At the minimum I'd like to check for the existence of a specific header and check its value. Requests are not coming ...
0
votes
1answer
105 views

how to debug mysql has gone?

I have a virtual machine(Ubuntu 12.04, MySQL 5.5) running under VMware and is dedicated to host a mysql server. I connect to this server on internal IP. I'm trying to find out why I get mysql server ...
3
votes
1answer
96 views

Investigating a potential CPU failure

On a Ubuntu server that I am using for computations I have recently observed that some CPU extensive programs (GUROBI,CPLEX) often segfault. Being in correspondence with tech support of the ...
1
vote
1answer
230 views

Lighttpd won't start when fastcgi.debug directive is used

I'm running lighttpd/1.4.28 (ssl) on Ubuntu 12.04 LTS. Everything's working, and I'm trying to do some performance tuning. I'd like to enable debug mode for the fastcgi module, however when I add ...
1
vote
0answers
32 views

Windows app not allowing debugging

I'll start by saying, I am not sure if this should go in StackOverflow or ServerFault. I posted it in StackOverflow earlier, but its been getting votes to close the question, so I assume it should be ...
12
votes
1answer
403 views

ext4 listing of files very slow in one specific directory that contained lots of files before

Background I had a small logrotate misshap... Logrotate would rotate the archived logs by misstake causing a quadratic growth of files in my /var/log/. And by the time I caught wind that something ...
2
votes
0answers
263 views

How to debug CGI over fcgiwrap/nginx

I serve executable scripts (mainly in C) through fcgiwrap connected with nginx. Since the scripts are complied, I can get the coding errors during compilation, but sometimes I receive CGI errors ...
2
votes
2answers
68 views

How to obtain last bash error

I am working with a terrible project. It uses a lot of messy shell script in background. Script might include some other scripts. And many error outputs were redirected to /dev/null. When a script is ...
3
votes
1answer
124 views

Windows 2003 r2 reboots after a few seconds from initiated

I'm having troubles with a virtual machine on a ESXi running windows server 2003 r2. The problem is that every time it initiates and displays the login window, the machine reboots with no warnings, no ...
1
vote
1answer
374 views

Debugging logrotate postrotate script

Following is my logrotate conf. /mnt/je/logs/apache/jesites/web/*.log" { missingok rotate 0 size 5M copytruncate notifempty sharedscripts ...
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votes
3answers
72 views

How to debug and prevent flaky unreliable IT environment? [closed]

I am not an IT admin, I'm a software developer (microsoft stack) and I'm trying to understand what is wrong with the IT environment of one of our customers. We have deployed our client\server ...
0
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2answers
2k views

Debugging a connection refused response on port 21

My colleagues and I are having trouble accessing Heart Internet's FTP servers. We are running a mixture of Macs and PCs and we have a Linux box in the office too. None of our machines can connect. ...
0
votes
2answers
338 views

Log PHP-script that take long time to render

I would like to find out, which pages on my server are really slow. Is it possible to log all pages that took longer than 2 seconds to render in a file? /var/log/php/php-slow.log Or could the ...
0
votes
1answer
64 views

Add causing php-script to mysql-slow.log

If you enable the line log_slow_queries = /var/log/mysql/mysql-slow.log in /etc/my.cnf or /etc/mysql/my.cnf then that will log all queries, that take longer than the setting in long_query_time. ...
1
vote
1answer
193 views

If I have a process which is supposed to be receiving data from multicast, how can I check if it actually is?

I can check gstack, but just because I see the listener threads on the recv call does not mean that call is not returning. One other thing I thought was to do something like: netstat -lupe | grep ...
0
votes
1answer
162 views

strace vs. log4cxx performance hit?

I need to debug some issue on a production server, and I'm trying to decide whether to use strace or the log4cxx logging library; one crucial characteristic I need to know before, is which of the two ...
2
votes
1answer
1k views

How to debug Node + Socket.io CPU Issues

We are running a Node Socket.io server with Express 3. The server is monitored using Forever. The service is running well, but the CPU grows throughout the day, until it reaches 90%+ and then suddenly ...
0
votes
2answers
180 views

Server does not load WordPress - No HTML nor PHP Errors

I just switched my Dreamhost WordPress site on my VPS from PHP 5.2 Fast CGI to 5.3 CGI. Somehow WordPress now refuses to load and shows a white screen of death on all WordPress pages. PHP Info and ...
0
votes
1answer
148 views

Can pingdom shut down/slow down a site on Heroku?

We have a Rails app on Heroku. We have 2 dynos. We're noticing that the site is not loading today with frequency. Lots of Request timeouts. Also, assets in particular, which are also hosted on ...
1
vote
2answers
31 views

debugging cache control

How can I check if a website is being cached correctly? I would like the webpages to be cached by browsers, but I also would like that page updates be visible immediatly when a user visits teh ...
0
votes
1answer
40 views

increasing log level to catch issues

How do you increase the log level for apache to add coredumpdirectory and to catch any segfaults. I am trying to debug some issues and need apache to log every little bit of activitiy.
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votes
1answer
66 views

Investigate why user has access to a folder [closed]

How can I understand why a particular user has access to a particular shared folder? Security tab of the folder contains a long list of groups groups and the user is not a direct member of any of ...
0
votes
2answers
185 views

CherryPy 3 with Apache 2 using ModWSGI: stack traces?

I am trying to show stack traces or at least some sort of errors rendered to the HTML response while using a WSGI script. A ModuleNotFound exception is raised when I tried to import a module the ...
1
vote
0answers
130 views

Is Snort able to efficiently demux and log large HTTP POST requests?

I'm trying to debug some failed HTTP POST requests containing large file uploads (~500 MB). The end-user is receiving strange HTTP responses that are not being logged in either varnish's varnishncsa ...
2
votes
1answer
2k views

centos 6 debuginfo repository does not have httpd debug version available

I am trying to get the debug version of httpd so I can use it in conjunction with gdb. I am having a hard time getting them, and they don't seem to be in the standard epel-debuginfo repository. What ...
1
vote
1answer
757 views

Apache 403 after configuring varnish

I just don't know where else to look and what else to do. I keep getting a 403 error on all my vhosts after setting varnish 3.0 Apacher log: [error] [client 127.0.0.1] client denied by server ...
1
vote
1answer
610 views

How to track down a 403 error in lighttpd?

I am including the following fragment (/etc/lighttpd/sites/local) from the top-level config file (/etc/lighttpd/lighttpd.conf) on a Ubuntu 10.04 LTS (x64) machine with Lighty 1.4.26 ...
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0answers
175 views

Debugging apache seg fault with gdb

Apache on a production server of mine is seg faulting intermittently. I have enabled core dump option in apache configuration and have several dumped core files. Unfortunately, since it is a ...
4
votes
1answer
259 views

Crash dump analysis

I hope this isn't a stupid question, and if it is, then I want to at least get it over with so I don't feel so dumb in the future. Here we are, loading up a Windows crash dump with Windbg. Here are ...
2
votes
1answer
1k views

Failure to obtain IP with ARP over Wi-Fi with personal Wi-Fi router in client mode

I'm trying to connect a Samsung TV to the Internet using a TL-MR3020 personal wireless router in client mode. The TV fails to connect to the network. It sees the ethernet cable connected though. ...
2
votes
1answer
442 views

SQL Server Debugging: “Unable to Step. Invalid operation”

I'm debugging a call to a Stored Procedure in SSMS (2012). Frequently, and various random points in the code, a dialog pops up: Microsoft SQL Server Management Studio: Unable to Step. Invalid ...
1
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2answers
538 views

Diagnose hard lockup on Linux

During past month one of my Debian Squeeze (Linux 2.6.32-bpo.5-amd64) machines did lock up twice, hard. No response to ARP, dark console, Caps Lock, Num Lock not working, Magic SysRq ineffective. ...
0
votes
1answer
1k views

IP Camera working on lan but not on internet

My IP cam model is Genius 350TR, I tested the cam at home on lan and internet and it worked. Then I shifted it to an office. It works on the office lan setup but I cannot connect to the ip cam from ...
2
votes
3answers
1k views

Failed Request Tracing XML fails to display in Internet Explorer (IIS 7.5)

I have installed the Tracing feature and enabled failed request tracing for a website, to debug a Classic ASP website. The XML logs are created upon occurring errors, however when I open them in IE, ...
1
vote
1answer
216 views

Node app crashes after a while on micro EC2 instance even with supervisor

I'm using supervisor to start my node.js application on a micro EC2 instance. However, the app only stays running for some time until it eventually shuts down. Not exactly sure how long the app stays ...