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From André Warnier>
Subject Re: Apache 2.2.3 segfault with Jk connector 1.2.27
Date Wed, 17 Dec 2008 22:54:11 GMT

Responding to my own earlier message, I think I have found what looks 
like a bug with the combination indicated, and a curious (to me) workaround.

Summary :

under Linux Suse Enterprise 10.1
using the Apache 2.2.3 (prefork) package of that distribution
using mod_jk 1.2.27

In the Apache main configuration section :

     JkWorkersFile /etc/apache2/conf.d/
     JkShmFile     /var/log/apache2/mod_jk.shm
     JkLogFile     /var/log/apache2/mod_jk.log
     JkLogLevel    debug
     JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "

In a VirtualHost section :

<LocationMatch "/my\.servlet$">
   SetHandler jakarta-servlet
   SetEnvIf REQUEST_URI "\.(htm|web|css|gif|jpg|js|html?)$" no-jk

Any attempt then to access a link ".../my.servlet?..." which should be 
re-directed to Tomcat by mod_jk (*) results in an Apache "child xxx 
segfault" in the error log (and no response to the browser).

But (workaround), adding the following 2 lines :

1) in the Jk statements of the main Apache server :

    JkMount /tomcatdummy ajp13

(/tomcatdummy being a totally fake URL fragment)

2) in the VirtualHost configuration (and outside of the <LocationMatch>):

    JkMountCopy on

the segfault magically disappears and everything works as it should.

Question thus : is my above first configuration invalid ?


(*) and seems to works fine on other servers with similar, but not 
necessarily equal Linux, Apache 2.2.x and mod_jk 1.2.x combinations.

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