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Date: Fri, 16 Oct 2009 14:26:01 -0400
Message-ID: <78c6bd860910161126g210ab743u372dc669daafa11@mail.gmail.com>
Subject: Re: Debugging: child process 14446 still did not exit, sending a
	SIGTERM
From: Michael B Allen <ioplex@gmail.com>
To: modules-dev@httpd.apache.org
Content-Type: text/plain; charset=ISO-8859-1

On Fri, Oct 16, 2009 at 1:10 PM, Joe Lewis <joe@joe-lewis.com> wrote:
> Michael B Allen wrote:
>>
>> I have a customer who very occasionally sees apache workers hang. I'm
>> pretty sure this is caused by an errant module but I don't know which
>> one.
>>
>> Is there any way to determine which module is causing Apache workers to
>> hang?
>>
>> Can I temporarily disable that SIGTERM so that I can have enough time
>> to attach GDB to the hanging processes?
>>
>> Mike
>>
>
> Perhaps run it in a non-forking mode (httpd -X -k start) inside of gdb and
> see what it hangs on?

If I run it in gdb like you suggest:

  # gdb httpd
  (gdb) run -X -k start

I cannot get httpd to run module deinitialization. Meaning if I do
apachectl stop or httpd -X -k stop or graceful-stop in another
terminal, it just kills the whole process group. Since the problem is
hanging during module deinitialization I don't think this is going to
help me. How do I shutdown httpd so that it runs the module
deinitialization routines?

Otherwise does anyone have a web-svn pointer to the code that's
calling the SIGTERM? Maybe I can find a way to disable it.

Mike