Hi, I had a thread a while back but my configuration has changed and so has my issue, so hence a new thread.
My config: CentOS 5.8 Apache 2.23 3 tomcat instances (6.0.30) with each ajp_port with a connectionTimeout setting of 180000 mod_jk 1.2.37 workers.properties: # Define 1 real worker using ajp13 worker.list=worker1, worker2, worker3, lbworker # Set properties for worker1 (ajp13) worker.worker1.type=ajp13 worker.worker1.host=localhost worker.worker1.port=8009 worker.worker1.connection_pool_timeout=180 worker.worker1.lbfactor=1 worker.worker1.ping_mode=A worker.worker1.socket_keepalive=true # Set properties for worker2 (ajp13) worker.worker2.type=ajp13 worker.worker2.host=localhost worker.worker2.port=8010 worker.worker2.connection_pool_timeout=180 worker.worker2.lbfactor=1 worker.worker2.ping_mode=A worker.worker2.socket_keepalive=true # Set properties for worker3 (ajp13) worker.worker3.type=ajp13 worker.worker3.host=localhost worker.worker3.port=8011 worker.worker3.connection_pool_timeout=180 worker.worker3.lbfactor=1 worker.worker3.ping_mode=A worker.worker3.socket_keepalive=true worker.lbworker.type=lb worker.lbworker.balance_workers=worker1, worker2, worker3 worker.lbworker.sticky_session=True I'm doing some performance tuning on our application and noticed a couple of days ago that which a load of 1500 users, my threads in VisualVM would turn white in a "off/unknown state" (can send a snapshot of this on demand). Since then, I added the ping_mode and socket_keepalive setting in my workers.properties file but that didn't seem to make a difference. All i see in my mod_jk log is this: [Mon Oct 29 09:16:56 2012] [12205:47535048426352] [info] ajp_handle_cping_cpong::jk_ajp_common.c (913): timeout in reply cpong [Mon Oct 29 09:16:56 2012] [12205:47535048426352] [info] ajp_maintain::jk_ajp_common.c (3289): (worker2) failed sending request, socket -1 keepalive cping/cpong failure (errno=24) [Mon Oct 29 09:18:36 2012] [10542:47535048426352] [info] ajp_handle_cping_cpong::jk_ajp_common.c (913): timeout in reply cpong [Mon Oct 29 09:18:36 2012] [10542:47535048426352] [info] ajp_maintain::jk_ajp_common.c (3289): (worker2) failed sending request, socket -1 keepalive cping/cpong failure (errno=24) Any idea what could be going on? Thanks, Charles
