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Posted to bugs@httpd.apache.org by bu...@apache.org on 2004/10/19 02:45:42 UTC
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Apache Stops Responding Due to Multiple Simultaneous Requests
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http://issues.apache.org/bugzilla/show_bug.cgi?id=31764
Apache Stops Responding Due to Multiple Simultaneous Requests
Summary: Apache Stops Responding Due to Multiple Simultaneous
Requests
Product: Apache httpd-2.0
Version: 2.0.52
Platform: PC
OS/Version: Windows NT/2K
Status: NEW
Severity: Critical
Priority: Other
Component: All
AssignedTo: bugs@httpd.apache.org
ReportedBy: christopher_theunissen@hotmail.com
Apache 2.0.52 on Windows 2000 Professional stops responding after a few hours.
At first, I thought it had something to do with PHP, as I was getting the
following error in the log, which is related to some know PHP bugs:
"[notice] Parent: child process exited with status 4294967295 -- Restarting"
However, none of the PHP workarounds made any difference and anyway, I can
reproduce the problem by sending 50 concurrent requests for a 26KB JPG on the
server using ab:
ab -n 100 -c 50 http://webserver/26kb.jpg
In fact, on my own PC, I end up with a bluescreen.
I have to stop and start Apache to get it running again - a normal restart does
not work.
A netstat -an shows there are 100 TIME_WAIT connections on port 80.
58 GET entries appear in the access log, but no errors are reported in the
error log, even when the log level is set to debug.
It is not a memory problem, as the server has 800MB and peak memory usage is
only 313MB.
In fact, it only takes 7 requests for it to stop responding:
ab -n 7 http://webserver/26kb.jpg
The next access to the website using a browser causes the site to stop
responding.
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