I have a problem with an apache who's stalling with too much requests. When I take a look at the server-status page I can see that most of the connections are in state "Reading Request", but do not finish. When I do a graceful restart, all of the "Reading Request"-connections disappear. Because the restart does not take long, I belief the connections are not used any more.
The apache is filling up with these request over some time (> 30 minutes). But when the connections are not used any more, I would expect some timeout to kill these connections, but this does not happen or the timeout is too big.
Does anyone know which timeout should kill these connections or am I searching at the wrong point?
Some details to the setup:
apache 2.0.55 on HP-UX with mod_jk 1.2.10
Most of the connections in state "Reading Request" are connections to an tomcat backend over mod_jk (client --> HP-UX apache --> Tomcats), but not all of them.
I know that mod_jk is a very old version, it is planned to be updated soon.
But I do not suspect mod_jk, because the same effect appears when redirecting the connections to another apache with newer mod_jk and then redirecting the connections to the tomcats (client --> HP-UX apache --> Linux apache --> Tomcats). It is always the HP-UX apache filling up with "RR"-connections.