I'm getting desperate to get mod_jk working in apache on RHES 3 talking
to tomcat 5.0.19 on (another) RHES3. I'm getting the error from the
subject line if I set JkLogLevel to "debug." In the browser I see 500's
for ANY servlet.
I've tried the RHES3 apache2 rpms (httpd-2.0.46-25.ent), building
apache2 from source (2.0.49), building apache1 from source (1.3.31),
with mod_jk static or DSO. Always the same thing.
I've played with the permissions on the workers.properties to world
readable, writable, and even executable. I strace'd httpd and it
appears to successfully read the file (strace output below).
I even copied a known workers.properties from a production web server
(apache 2.0.43 built from source on Solaris) and it does the same
thing. So I'm reasonably sure it's not a problem with the
workers.properties file itself.
I built mod_jk from the
jakarta-tomcat-connectors-jk-1.2-src-current.tar.gz tarball which
creates a jakarta-tomcat-connectors-jk-1.2.5-src directory.
I built my own version of mod_jk that logs in the map_get function in
jk_map.c and it appears that the map passed in the parameter jk_map_t *m
is null. I've been trying to figure out why, and I'm just about stuck.
I have also tried mod_jk2 (with a workers2.properties) and it works
under low load. Even with only 3 thread in siege I get "Broken Pipe"
errors in the tomcat logs and AjpGetReply errors in the jk logs. I
think this is similar to bugs 28790 and/or 28532. We also saw this in
our production servers, and our customers were seeing pages that just
never finished loading until we switched back to jk1. So I could use
jk2 if I knew how to get around that, but jk1 would do, too.
Relevant (I think) strace output:
stat64("/usr/local/apache/conf/workers.properties",
{st_mode=S_IFREG|0777, st_size=788, ...}) = 0
read(3, "", 4096) = 0
close(3) = 0
munmap(0xb75ea000, 4096) = 0
from httpd.conf:
JkWorkersFile /usr/local/apache/conf/workers.properties
JkLogFile /var/log/mod_jk-a13.log
JkLogLevel debug
JkMount /apps/* lb
workers.properties:
worker.list=xsappa
worker.xsappa.port=139
worker.xsappa.host=192.168.2.40
worker.xsappa.type=ajp13
worker.xsappa.lbfactor=1
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