Hello folks,

I am running into a problem I need help with. Basically, after careful reading of configurations at the Apache, mod_jk (1.2.28) and Jboss/Tomcat (server.xml, connectors) my web app runs fine for about a couple of hours then stops  processing requests due apparently to errors between mod_jk and the Jboss/Tomcat nodes. I have two Jboss/Tomact nodes (node1 and node2). The error in mod_jk.log is

[Fri Dec 03 16:35:40 2010][32214:3086424672] [info] service::jk_lb_worker.c (1453): All tomcat instances failed, no more workers left (attempt=1, retry=1)
[Fri Dec 03 16:35:40 2010][32214:3086424672] [info] get_most_suitable_worker::jk_lb_worker.c (981): all workers are in error state for session A4E763A39D20C7A4DECB934C0E089E79.node2
[Fri Dec 03 16:35:40 2010][32214:3086424672] [info] service::jk_lb_worker.c (1453): All tomcat instances failed, no more workers left (attempt=2, retry=1)
[Fri Dec 03 16:35:40 2010][32214:3086424672] [info] service::jk_lb_worker.c (1464): All tomcat instances are busy or in error state
[Fri Dec 03 16:35:40 2010][32214:3086424672] [error] service::jk_lb_worker.c (1469): All tomcat instances failed, no more workers left

My relecant Apache configuration is:

<IfModule prefork.c>
StartServers       8
MinSpareServers    5
MaxSpareServers   20
ServerLimit      256
MaxClients       256
MaxRequestsPerChild  0
</IfModule>

mod_jk.conf:

# Define a template to be used by all nodes
worker.template.type=ajp13
worker.template.lbfactor=1
worker.template.ping_timeout=1000
worker.template.ping_mode=A
worker.template.socket_timeout=10
worker.template.connection_pool_timeout=60
worker.template.recovery_options=1

# Define node1
worker.node1.reference=worker.template
worker.node1.port=8009
worker.node1.host=10.0.51.10
worker.node1.domain=node1.rebt.com
worker.node1.session_cookie=node1

# Define node2
worker.node2.reference=worker.template
worker.node2.port=8009
worker.node2.host=10.0.51.11
worker.node2.domain=node2.rebt.com
worker.node2.session_cookie=node2

# Define load balancer for nodes 1, 2
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=node1,node2
worker.loadbalancer.method=R
worker.loadbalancer.sticky_session=1
worker.loadbalancer.sticky_session_force=1

server.xml (for node1; same for node2)

<Connector port="8009" address="${jboss.bind.address}" protocol="AJP/1.3"
         emptySessionPath="true" enableLookups="true" redirectPort="8443" maxThreads="256"
           connectionTimeout="60000" />

      <Engine name="jboss.web" defaultHost="localhost" jvmRoute="node1">

I would greatly appreciate any help / hints you may provide on this.

Moze