We used mod_jk for ages and have recently flipped back to mod_proxy for
our java/tomcat apps, we found that we had connectivity issues with
mod_jk - if the connection between apache/tomcat is severed then mod_jk
did not always work cleanly - and subsequent requests would just hang.
mod_proxy didn't have the problem.
The problem showed it self when we started segregating machines into
virtual firewall zones - so traffic between machines was controlled.
It does mean that we don't have as easy a load-balanced setup -
although we do send the requests back through our front-end load
balancers and this seems effective.
James
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