Hi John, Yes, I do have the JBoss jvmRoute attribute set up correctly. I also noticed the balance vs balanced wording, and I tested my setup with both and there seemed to be no difference. I assume that both wordings are correct because node2 can respond to requests with both. (And after any configuration modification, I do restart Apache with "httpd2 -k restart".) JBoss also had another configuration setting (thank goodness for taking notes during setup). In jboss/server/myapp/deploy/jbossweb-tomcat55.sar/META-INF/jboss-service.xml, find the attribute 'name="UseJK"', change value from false to true. Thanks, KaJun John Moore-3 wrote: > > Do you have the jvmRoute setup in the server.xml in JBoss/Tomcat (e.g. > <Engine ... jvmRoute="node1">) ? > > you have balance_workers, I think it's balanced_workers > > John > > -----Original Message----- > From: weiji [mailto:nabbleOp@xxxxxxxxxxx] > Sent: Tuesday, November 13, 2007 2:21 PM > To: users@xxxxxxxxxxxxxxxx > Subject: mod_jk load balancing issue: one worker always > dies... > > > Hi, > > I'm using mod_jk to load balance two JBoss instances. However, it seems > to > always use only one of them. > > From watching the status page, I found that the two workers both come up > in > an OK state. However, sending a request through the load balancer seems > to > always cause the first one to switch to an error state (ERR), causing > the > request to be routed to the second worker (which successfully returns > the > requested page). After the status worker's maintenance countdown, the > state > of the first worker switches to ERR/REC and then it never gets itself > out of > that state. At this point, we can still hit both instances of JBoss by > using a direct port to access our webapp. > > If I use the reset command on the bad worker, it comes back up as > OK/IDLE > but sending a request through the balancer will produce the same > behavior. > > I thought the two JBoss instances might be interfering with each other, > so I > shut down the second JBoss instance and configured mod_jk to use only > node1 > (set "worker.loadbalancer.balance_workers=node1" only) and restarted > Apache, > and the worker still goes into an Error state. > > Here are the setup details: > Suse enterprise linux 10 > Apache 2.2.0-21.2 > mod_jk "1.2.25-httpd-2.2.4" > > the workers.properties file: > > # Define list of workers that will be used > # for mapping requests > worker.list=loadbalancer,status > > # Define Node1 > # modify the host as your host IP or DNS name. > # port is the AJP port defined in server.xml > worker.node1.port=8009 > worker.node1.host=192.168.4.151 > worker.node1.type=ajp13 > worker.node1.lbfactor=1 > #worker.node1.cachesize=10 > > # Define Node2 > # modify the host as your host IP or DNS name. > # port is the AJP port defined in server.xml > worker.node2.port=8010 > worker.node2.host=192.168.4.151 > worker.node2.type=ajp13 > worker.node2.lbfactor=1 > #worker.node2.cachesize=10 > > # Load-balancing behaviour > worker.loadbalancer.type=lb > worker.loadbalancer.balance_workers=node1,node2 > worker.loadbalancer.sticky_session=1 > > # Status worker for managing load balancer > worker.status.type=status > > > > Has anyone seen something like this? Is there a workaround or some > configuration that I need to adjust? > > Thanks, > KaJun > -- > View this message in context: > http://www.nabble.com/mod_jk-load-balancing-issue%3A-one-worker-always-d > ies...-tf4800991.html#a13736022 > Sent from the Apache HTTP Server - Users mailing list archive at > Nabble.com. > > > --------------------------------------------------------------------- > The official User-To-User support forum of the Apache HTTP Server > Project. > See <URL:http://httpd.apache.org/userslist.html> for more info. > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx > > > --------------------------------------------------------------------- > The official User-To-User support forum of the Apache HTTP Server Project. > See <URL:http://httpd.apache.org/userslist.html> for more info. > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx > > > -- View this message in context: http://www.nabble.com/mod_jk-load-balancing-issue%3A-one-worker-always-dies...-tf4800991.html#a13757377 Sent from the Apache HTTP Server - Users mailing list archive at Nabble.com. --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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