DO NOT REPLY [Bug 22484] New: - semaphore problem takes httpd down

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22484

semaphore problem takes httpd down

           Summary: semaphore problem takes httpd down
           Product: Apache httpd-2.0
           Version: 2.0.47
          Platform: HP
        OS/Version: HP-UX
            Status: NEW
          Severity: Critical
          Priority: Other
         Component: prefork
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: vt@vorsprung-durch-denken.de


Hello,

Basically I run into the problem which is discussed here:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xf91e36e69499d611abdb0090277a778c,00.html

But the proposed fix (rising semaphore-related kernel parameters) does not help.
We run 11.11 at a fairly recent patch level. A full trace of Apache 2.0.47 until
it's "suicide" is available (given httpd is alive...) at:

http://vorsprung-durch-denken.de/apache-trace.txt

And the main error log holds:

tons of: [emerg] (22)Invalid argument: couldn't grab the accept mutex
some: [emerg] (36)Identifier removed: couldn't grab the accept mutex
few: [emerg] (28)No space left on device: couldn't grab the accept mutex

The symptom does not appear to be related to the number of children. I watched
the parent die with 46 and another time with 17 child processes. The load of the
machine is around 0.2 all the time.

To put it straight: I'm stuck and hoping some good soul out there can help!

Any hint is appreciated - TIA
vt

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