Failover not working

["Sharma, Siddharth" <Si...@Staples.com>]

RedHat Linux
Tomcat 5.5
Mod-jk 1.2.15
Apache web server

We have a number of Linux boxes each running 4 instances of Tomcat.
Each Linux box has an Apache that load balances (mod-jk) over all the
Tomcats on all boxes. Sticky sessions are enabled. Tomcat clustering is not
being used.

While doing failover testing, all scenarios succeeded except one.
The user is sticky to machine 1, tomcat/worker 2 (say).
If machine 1 is shutdown completely, the user is continuously directed to
the same tomcat worker (and sees errors). When the machine comes back up,
the user's request successfully fails over to an available worker on another
machine.

I cannot figure out why mod-jk is not recognizing that the worker the user
is sticky to, is not available. 

Any ideas?
Thanks
Sid


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