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From Mike Jakubik <mike.jaku...@intertainservices.com>
Subject Re: apr 1.4.4 breaks mod_jk
Date Tue, 17 May 2011 22:58:45 GMT
On Wed, 2011-05-18 at 00:53 +0200, Rainer Jung wrote:


> If you can find pstack, that will be easier. pstack just takes the
> process id and writes out the stacks for all threads. My quick search
> indicates it pstack should exist for FreeBSD.
> 


There is a port for this but it only support i386 arch, im running
amd64.

http://www.freshports.org/sysutils/pstack/


> GDB allows to also get details on the values of variables used, step
> through the code etc. You give gdb two arguments, the path to your httpd
> binary and the process ID of the CPU consuming process. Once the gdb
> prompt is shown, you can enter
> 
> thread apply all bt full
> 
> which will output thread and variable information for all threads.
> 
> pstack and gdb might produce many lines of output, especially for
> worker, so you might want to write the result directly to a file, e.g.
> 
> pstack PID > /tmp/pstack.txt
> 
> And yes, if the problem also occurs for prefork, then that makes
> debugging a bit easier.



I'll recompile to prefork and give GDB a go, thanks for the info.


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