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Posted to bugs@httpd.apache.org by bu...@apache.org on 2005/05/02 15:40:58 UTC
DO NOT REPLY [Bug 34708] New: -
Apache 2.0 seems not to work properly on NFS shared resources
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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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