worker-timeout can cause httpd thread stalls

1) Configure jboss with worker-timeout="1" in the modcluster subsystem 2) Start httpd and JBoss. Run httpd on a multicore system (4+ cores). 3) Confirm JBoss is reachable through httpd/mod_cluster then kill JBoss so the mod_cluster worker-timeout retry logic is used 4) Load up httpd with highly concurrent request traffic for JBoss for some time. Then check for stalled requests/threads. Each request should finish by ~1 second. But this could take minutes once stalled. You can check access logs with %T to check response times once they're done, pstack to check threads, or the mod_status page (it'll show may threads in W state with many seconds since their requests started, which keeps growing)..