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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 34980] New: - At high loads, Apache 2.0.53 crashes completely on HP-UX platform
Date Fri, 20 May 2005 06:49:11 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=34980

           Summary: At high loads, Apache 2.0.53 crashes completely on HP-UX
                    platform
           Product: Apache httpd-2.0
           Version: 2.0.53
          Platform: HP
        OS/Version: HP-UX
            Status: NEW
          Severity: critical
          Priority: P1
         Component: All
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: vasu.san@gmail.com


We are going to add new servers for the site www.indianrail.gov.in with Apache 
2.0.53 on HP-UX 11i ver 2 platform. Systems are under offline testing mode. We 
have configured Apache with the following settings:

StartServers 2
ServerLimit 50
MaxClients 950
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0

We started Apache with the default HP-UX kernel tunables & found that APache 
was able to take connections around 200 & beyond this error were flashed in 
the log files as "Resource Temporarily Unavailable: couldn't create child 
process 11 : <name_of_the_cgi_scripts>"
we found that maxuprc parameter (max process per user) was set to 256 hence 
the error was there. Now we have set this to 1024 & increased the load. I've 
seen Apache have taken connections around 600-700 but suddenly Apache crashed. 
Error displayed in the log files are as follows:

i) "Resource Temporarily Unavailable: couldn't create child process 11 : 
<name_of_the_cgi_scripts>"

ii) "the listener thread didn't exit"

iii) "Child <child no> isn't taking over slots very quickly"

iv) "Resource Temporarily Unavailable: apr_thread_create: unable to create 
worker thread"

Pls suggest solution to rectify this

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