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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 22516] New: - Apache 2 crashes with Acept Mutex error when stressed with 20 users on HP-UX 11.00
Date Mon, 18 Aug 2003 14:17:26 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22516

Apache 2 crashes with Acept Mutex error when stressed with 20 users on HP-UX 11.00

           Summary: Apache 2 crashes with Acept Mutex error when stressed
                    with 20 users on HP-UX 11.00
           Product: Apache httpd-2.0
           Version: 2.0.47
          Platform: HP
        OS/Version: HP-UX
            Status: NEW
          Severity: Blocker
          Priority: Other
         Component: Core
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: arthur.luimes@ins.com


During a loadtest with 20 concurrent users, Apache 2.0.47 (using all default 
config values) crashes on HP-UX 11.00. The error messages are:
[Mon Aug 18 15:35:06 2003] [emerg] (28)No space left on device: couldn't grab 
the accept mutex
[Mon Aug 18 15:35:06 2003] [alert] Child 2349 returned a Fatal error...
Apache is exiting!
[Mon Aug 18 15:35:06 2003] [emerg] (36)Identifier removed: couldn't grab the 
accept mutex
[Mon Aug 18 15:35:06 2003] [emerg] (36)Identifier removed: couldn't grab the 
accept mutex
[Mon Aug 18 15:35:06 2003] [emerg] (36)Identifier removed: couldn't grab the 
accept mutex
... etc....

There is plenty of space on all devices: this could not be the issue. I've 
tried adjusting some HP paramateres as in the HP thread:
http://forums.itrc.hp.com/cm/QuestionAnswer/0,,0xf91e36e69499d611abdb0090277a778
c,00.html

All to no avail. 

My system is now an easy target for DOS attacks. What to do?

P.S. I've load-tested the sever with 10 concurrent users and find no problems.

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