mod_proxy/1838: enabling caching causes deamons to fail to close connections

[Joerg Reichelt <jr...@dtas.net>]

>Number:         1838
>Category:       mod_proxy
>Synopsis:       enabling caching causes deamons to fail to close connections
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Thu Feb 19 13:10:00 PST 1998
>Last-Modified:
>Originator:     jreichelt@dtas.net
>Organization:
apache
>Release:        1.3B3
>Environment:
OS: Linux 2.0.30
Platform: Pentium II 300 MHz, 128 MB RAM, 150 MB swap space, 2 GB HDD
Compiler: gcc version 2.8.0
>Description:
we enabled caching on our web proxy using the following settings:

CacheRoot /usr/local/www/cache
CacheSize 50000
CacheGcInterval 24
CacheMaxExpire 200
CacheLastModifiedFactor 0.1
CacheDirLevels 20
CacheDefaultExpire 200
NoCache .dtas.net

when a proxy request is made, the proxy process stays in state "W" (indicated
by /status), and the load grows up to 60 and above. the machine is vitually
dead, and is aggressively accessing the hard disk.

when the caching is disabled, the load never exceeds 0.2!
>How-To-Repeat:
unfortunately, this server is in our corporate intranet, so it is not visible from
the internet. but i am happy to send any required information, like the
configuration files or the compiled binary.
>Fix:
disabling caching works well for us as a temporary fix
>Audit-Trail:
>Unformatted:
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