The debugging tag has no wiki summary.
-4
votes
3answers
51 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
votes
2answers
50 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
52 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
24 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
17 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
0answers
12 views
How to format the trace logs of smartcard services?
I'm trying to debug some certificate/smartcard issues and found the article Smart Cards Debugging and Developer Information at http://technet.microsoft.com/en-us/library/ff404296%28v=ws.10%29.aspx. ...
0
votes
0answers
25 views
Remote debugging visual studio asp.net web application with external IP
I try to install remote debugger in my remote machine, and connect to it in my local computer, using visual studio 2012 for asp.net web application, windows8.
remote and local computers are not in the ...
0
votes
1answer
23 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 ...
0
votes
1answer
55 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
50 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
52 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
21 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
22 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.
-2
votes
1answer
56 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
1answer
62 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
71 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 ...
1
vote
1answer
493 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 ...
0
votes
0answers
53 views
How can I retrieve raw data from h2db? [closed]
I have an h2db file. I need to get the raw data from it.
So far, the only way that I can figure out how to get at the data is to install h2db and write my own java client for it. Oracle has SQL ...
1
vote
1answer
173 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 ...
0
votes
0answers
145 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 ...
0
votes
0answers
188 views
Getting 403 but apache's error/access log is clean
I'm trying to figure out why my enabling mod_fcgid results in 403 and my apache's error.log and access.log show no relevant information. access.log stays empty and this is error.log:
AH00112: ...
0
votes
0answers
77 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
193 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
545 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.
...
0
votes
0answers
32 views
Underperforming IBM X3550 / SQL Server 2005 / Windows Server 2003 server diagnostic checklist
Since a couple of weeks our SQL Server is behaving strangely:
Symptoms:
Query deadlocks started occurring
Some queries timeout
Access to folders sometimes is laggy
No changes have been done to ...
0
votes
0answers
57 views
Why PHP errors causing WSOD when display errors is on?
I'm trying to setup php xdebug to work with Microsoft Web Matrix.
Configuration values that gives me phpinfo():
Loaded Configuration File C:\Program Files (x86)\IIS Express\PHP\v5.3\php.ini
...
1
vote
0answers
117 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 ...
0
votes
2answers
250 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
0answers
65 views
Log calls to systemd on openSUSE 12.1
On one server running openSUSE 12.1 (upgraded from 11.x) time to time OpenLDAP service stops. According to logs something/someone stops it using systemd API (the API that systemctl command uses), but ...
0
votes
1answer
658 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
1answer
273 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, ...
0
votes
1answer
138 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 ...
0
votes
0answers
52 views
How to know which URL htaccess is pointing for debugging?
I'm trying to point htaccess to a certain directory, when it's pointing elsewhere I get:
Not Found
The requested document was not found on this server.
Web Server at @domain_name@
I want to know ...
1
vote
2answers
248 views
Amazon EC2 instance - issuing “top” command just goes blank on the ssh terminal
I have created an Amazon EC2 micro instance, running Amazon AMI. I logged into the server using ssh client. Once it logs in successfully, if I issue the "top" command, the top output never shows up ...
2
votes
2answers
162 views
sshd immediately core dumps after fsck repair
I have a centos server that recently needed a fsck repair on it's main hard drive. After fixing a bunch of inode issues (booting from a system rescue disk), the box booted clean. Most of the ...
1
vote
1answer
551 views
How to trace Apache 301 Moved Permanently?
I have one virtual host on my machine, which I am accessing localy. I am running apache2 under windows 7.
When accessing this host, I see in Fiddler, that server redirects browser to different remote ...
4
votes
4answers
3k views
How can I investigate sustained high CPU usage by Microsoft.Exchange.Rpc.ClientAccess.Service.exe?
One CAS server in our array has nearly 90% of its 4 CPUs used. The remaining CAS servers are at 30 percent.
How should I investigate what is causing this increase?
Below is a graph of:
Six ...
1
vote
0answers
182 views
A tool to measure overhead of establishing TCP connections
I need a tool which would while doing port forwarding measure how much time was spent establishing TCP connections vs total time passed. Charles debugging proxy has the port forwarding feature and ...
1
vote
1answer
42 views
Should I Install Windows 2003 Server Debugging Symbols in a Production Environment?
I have a software vendor that has requested that we install the Windows debugging symbols and the desktop heap monitor in our production environment. The vendor is trying to determine if we are ...
0
votes
0answers
178 views
Best way to determine overhead of running DebugDiag in Production for Memory Leaks?
Our IT team is trying to track down some memory issues we're having in production with a specific customer. Since this is a classic ASP application on Win2K3/IIS6 we've determined that ...
1
vote
0answers
168 views
GRE debug: “adding 0 encap bytes”?
What this debug message actually means? Shouldn't encapsulation add 24 extra bytes or not? For what reason encapsulation is not adding bytes to original packet in this debug message?
Dec 28 ...
1
vote
2answers
395 views
Command that will take a 'system snapshot' of a linux system for later diagnosis?
I am running a Ubuntu Linux server with Apache, wsgi, django and mysql on it. Recently something happened and the wsgi processes frooze up. Restarting apache solved the problem. As with many live ...
0
votes
2answers
184 views
how do I troubleshoot rdp
I have one Windows XP SP3 pc on the domain that I cannot rdp into.
The xp pc is enabled for rdp sessions.
Port 3389 is open in the firewall.
There are no errors in the event logs.
I have tried to rdp ...
2
votes
1answer
448 views
Why can't openSSL verify google's certificate?
When I run the command openssl -connect www.google.com:443 from a Debian VM, I get the following within the output:
Verify return code: 20 (unable to get local issuer certificate)
What's going ...
0
votes
1answer
132 views
Debugging/Developing tool for apache's mod_rewrite (Rewrite Engine)
Is there any tool (GUI or online) for developing and debugging apache's mod_rewrite (Rewrite Engine) rules?
Something like Regex tools that get input (for example URLs per line) and some rewrite ...
1
vote
0answers
213 views
ColdFusion server won't to start
I'm trying to debug coldfusion application in Adobe Coldfusion builder 2.0 and I coldfusion server won't start. Here is log of console:
[localServer]:Listening for transport dt_socket at address: ...
0
votes
1answer
121 views
Coldfusion crashing when I initiate debugging session?
I've been trying to hook up eclipse to RDS for a CF8 testing server I have in my office. Every time I try to test the connection, the CF8 application server service crashes. When I check the event ...
0
votes
1answer
408 views
I would like to redirect port 8140 on my public IP address (ip1) to port 8140 on Internet host (ip2)
edit3:
i would like to get exactly what is descripted in http://shorewall.net/FAQ.htm#faq1g but it doesn't work for me.
edit3 end;
os: debian squeeze
shorwall: 4.4.11.6-3
3 computers a, b & c; ...
2
votes
2answers
2k views
How to debug “HTTP request sent, awaiting response”?
I have a Linux server on an ADSL connection, and I just noticed that sometimes I get
Connecting to example.com|xxx.xxx.xxx.122|:80... connected.
HTTP request sent, awaiting response...
when I use ...
1
vote
3answers
679 views
How can I find out where a file is physically located on the disk (block numbers)?
This is an obscure question, I know. I'm trying to do some performance testing of some disks on a Linux box. I'm getting some inconsistent results, running the same test on the same disk. I know ...
