i have Jboss 4.0.5(Cluster) on Windows 2003. My loadbalancer are Apache/2.2.4 (Win32) mod_jk/1.2.23 with this configuration: workers.properties: Here only one Node configuration for example. # Define Node1 worker.node1.port=8009 worker.node1.host=127.0.0.1 worker.node1.type=ajp13 worker.node1.lbfactor=1 #worker.node1.local_worker=1 (1) #worker.node1.cachesize=10 #deprecated for Apache/2.2.4 (Win32) mod_jk/1.2.23 #worker.node1.socket_timeout=10 #worker.node1.socket_keepalive=1 #The next three properties allow mod_jk to efficiently determine if a connection is in error or not responding fast enough due to whatever reason. worker.node1.connect_timeout=10000 worker.node1.prepost_timeout=10000 #This value must equal server.xml's connectionTimeout of 10 minutes worker.node1.connection_pool_timeout=600 worker.node1.connection_pool_size=250 worker.node1.connection_pool_minsize=126 On the Tomcat side: server.xml My AJP 1.3 Connector on port 8009 Connector port="8009" address="127.0.0.1" emptySessionPath="true" enableLookups="false" redirectPort="8443" protocol="AJP/1.3" maxThreads="800" backlog="200" connectionTimeout="600000" / i have often this errors on the Apache side and often my Jboss are not respond anymore.My Jboss are not down. --1-- [Mon Dec 10 13:32:54 2007][4916:6568] [error] jk_ajp_common.c (951): (node3) can't receive the response message from tomcat, network problems or tomcat (127.0.0.1:8109) is down (errno=60) [Mon Dec 10 13:32:54 2007][4916:6568] [error] jk_ajp_common.c (1618): (node3) Tomcat is down or network problems. Part of the response has already been sent to the client [Mon Dec 10 13:32:54 2007][4916:6568] [info] jk_ajp_common.c (1902): (node3) receiving from tomcat failed, recoverable operation attempt=0 [Mon Dec 10 13:32:54 2007][4916:6568] [info] jk_ajp_common.c (1941): (node3) sending request to tomcat failed, recoverable operation attempt=1 [Mon Dec 10 13:32:54 2007]loadbalancer 10.10.9.115 0.015625 --2-- [Mon Dec 10 13:25:25 2007][4916:2796] [error] jk_ajp_common.c (951): (node4) can't receive the response message from tomcat, network problems or tomcat (127.0.0.1:8209) is down (errno=60) [Mon Dec 10 13:25:25 2007][4916:2796] [error] jk_ajp_common.c (1618): (node4) Tomcat is down or network problems. Part of the response has already been sent to the client [Mon Dec 10 13:25:25 2007][4916:2796] [info] jk_ajp_common.c (1902): (node4) receiving from tomcat failed, recoverable operation attempt=1 [Mon Dec 10 13:25:25 2007][4916:2796] [info] jk_ajp_common.c (1941): (node4) sending request to tomcat failed, recoverable operation attempt=2 [Mon Dec 10 13:25:25 2007][4916:2796] [error] jk_ajp_common.c (1953): (node4) Connecting to tomcat failed. Tomcat is probably not started or is listening on the wrong port [Mon Dec 10 13:25:26 2007]loadbalancer 10.10.9.115 0.000000 [Mon Dec 10 13:25:27 2007][4916:2796] [info] jk_lb_worker.c (1098): service failed, worker node4 is in error state [Mon Dec 10 13:25:27 2007][4916:2796] [info] jk_lb_worker.c (1160): All tomcat instances are busy or in error state --3-- [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1215): (node3) error sending request. Will try another pooled connection [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1215): (node3) error sending request. Will try another pooled connection [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1215): (node3) error sending request. Will try another pooled connection [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1215): (node3) error sending request. Will try another pooled connection [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1215): (node3) error sending request. Will try another pooled connection [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1241): (node3) all endpoints are disconnected [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1244): (node3) increase the backend idle connection timeout or the connection_pool_minsize [Mon Dec 10 12:46:41 2007][5468:3588] [info] jk_ajp_common.c (1941): (node3) sending request to tomcat failed, recoverable operation attempt=1 [Mon Dec 10 12:46:42 2007]loadbalancer 10.10.9.115 0.000000 What is going on on Tomcat side ? Really out of ideas, any suggestions? Tufan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4111667#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...