Unexplained unresponsiveness of Apache httpd

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Hello,=20

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I am currently dealing with a situation where the Apache httpd process
becomes unresponsive for some time. At the end of this time, the Apache
error log shows:=20

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[Mon Nov 2 13:27:49 2009] [warn] child process 7310 did not exit,
sending another SIGHUP
[Mon Nov 2 13:27:49 2009] [warn] child process 27558 did not exit,
sending another SIGHUP
[Mon Nov 2 13:27:49 2009] [warn] child process 751 did not exit, sending
another SIGHUP

.. . .=20

[Mon Nov 2 13:27:50 2009] [warn] child process 7164 still did not exit,
sending a SIGTERM

[Mon Nov 2 13:27:50 2009] [warn] child process 13494 still did not
exit, sending a SIGTERM

[Mon Nov 2 13:27:54 2009] [error] child process 26222 still did not
exit, sending a SIGKILL

[Mon Nov 2 13:27:54 2009] [notice] SIGHUP received. Attempting to
restart

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After this restart, the process resumes normal operation.=20

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I would appreciate any assistance in debugging this problem.

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Thanks,

Regards,

Raj Iyer


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Re: Unexplained unresponsiveness of Apache httpd

On Tue, 2009-11-03 at 17:03 +0000, Raj Iyer wrote:
> [Mon Nov 2 13:27:49 2009] [warn] child process 751 did not exit,
> sending another SIGHUP


Child process not responding to singals indicates a very very serious
system-level issue.

$ uname -a ?

Try ktrace/strace the child PID as well

~BAS


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Re: Unexplained unresponsiveness of Apache httpd

Raj Iyer wrote:
>
> I am currently dealing with a situation where the Apache httpd process
> becomes unresponsive for some time. At the end of this time, the Apache
> error log shows:
>
> [Mon Nov 2 13:27:49 2009] [warn] child process 7310 did not exit,
> sending another SIGHUP
> [Mon Nov 2 13:27:49 2009] [warn] child process 27558 did not exit,
> sending another SIGHUP
> [Mon Nov 2 13:27:49 2009] [warn] child process 751 did not exit, sending
> another SIGHUP
>
> . . .
>
> [Mon Nov 2 13:27:50 2009] [warn] child process 7164 still did not exit,
> sending a SIGTERM
>
> [Mon Nov 2 13:27:50 2009] [warn] child process 13494 still did not
> exit, sending a SIGTERM
>
> [Mon Nov 2 13:27:54 2009] [error] child process 26222 still did not
> exit, sending a SIGKILL
>
> [Mon Nov 2 13:27:54 2009] [notice] SIGHUP received. Attempting to
> restart
>
>
>
> After this restart, the process resumes normal operation.
>
It is not very clear if the messages above happen before, or after you
have sent a "restart" command to your server.
Can you give a bit more details about what you are doing exactly, step
by step, and what you mean by being "unresponsive" ?

Also, some additional information about the Apache version, the platform
on which is running, etc.. would probably not be superfluous.

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