If the timeout of the Apache BalancerMember for OX is not configured the global Apache timout is inherited there. On RHEL installations this global timeout is 60 seconds which is too short for our AJP ping mechanism.

The example configuration for Apache located in
/usr/share/doc/open-xchange/examples/proxy_ajp.conf
is changed. The lines defining the BalancerMember are extended with timeout=100 and they now look like this:

BalancerMember ajp://localhost:8009 timeout=100 smax=0 ttl=60 retry=60 loadfactor=50 route=OX1