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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 34708] New: - Apache 2.0 seems not to work properly on NFS shared resources
Date Mon, 02 May 2005 13:40:58 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=34708

           Summary: Apache 2.0 seems not to work properly on NFS shared
                    resources
           Product: Apache httpd-2.0
           Version: 2.0.54
          Platform: PC
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Core
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: mariop69@tin.it
                CC: mariop69@tin.it


I got n web servers (www1 ... wwwn) mounting the same resources from a nfs 
server (nfs-server).
All of these are different physical machine.
The same resources are shared through web servers and ftp servers.
Any updates of the web contents is done through ftp.
Some time (very frequently) we see some of the httpd processes swallowing all 
the memory resources
till the kernel get almost stuck. The overall throughput of the web servers is 
150-250 Mbit.
We tried to reproduce the event (with good luck) this way:
on ftp server I put this simple script
while : do; cat b.html > a.hmtl; cat c.html > a.hmtl; done
a.html and b.html are different files of different size
>From a client I wget a.html in a loop.
I targeted only one web server but it happens on all.
For some misterious reasons some gets not all, force the httpd process in 
charge 
of the request, to grow huge in memory.
I tested this behavour with different nfs server (NetApp and Solaris 9) and 
different 
version of Apache-httpd: this blocking event happens on apache version 2.0.[44-
54] but 
not on 1.3.33. The conf files are those Apache is shipped with, with only few 
necessary
line about virtual host (just one virtual) uncommented.
The loadmodule directives have not been changed.
Web servers and ftp server are version of RedHat linux ES 3.0 (update 3).
Thnks for your work and the effort spent in the past, present and future.

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