Hi everyone, I have JBoss 3.2.3 in production over two servers. I've been having intermittent cache invalidation problems ever since we deployed. An example is an update to an entity bean in Server A is occasionally not reflected in Server B.
The situation improved when we optimized the application so that it is lightly loaded (less than 50% utilization). However, it still occurred a couple of times a week. Thinking it might be the network switch swallowing multicast packets, I tried to solve the problem by switching to TCP for the transport layer of JGroups but it did not work. Two days ago, I added Apache to Server A to do load balancing to Server A and B using mod_jk. The cache invalidation problem has suddenly ballooned and I get 10 or more problem instances per day. (The workaround I use to survive temporarily is to flush the specific entity bean cache when it occurs). It would be a tremendous help if someone could help me identify some steps I could take to either diagnose the problem or solve it? Many thanks in advance! My JGroups configuration is below. Thanks, Aris <TCP start_port="7800" bind_addr="10.20.0.18"/> | <TCPPING initial_hosts="10.20.0.18[7800],10.20.0.17[7800]" | port_range="5" up_thread="true" down_thread="true" | num_initial_members="2" timeout="5000"/> | <MERGE2 min_interval="5000" max_interval="10000" /> | <FD shun="true" up_thread="true" down_thread="true" | timeout="2500" max_tries="5" /> | <VERIFY_SUSPECT timeout="3000" num_msgs="3" | up_thread="true" down_thread="true" /> | <pbcast.NAKACK gc_lag="50" retransmit_timeout="300,600,1200,2400,4800" | up_thread="true" down_thread="true" /> | <pbcast.STABLE desired_avg_gossip="20000" | up_thread="true" down_thread="true" /> | <pbcast.GMS join_timeout="5000" join_retry_timeout="2000" | shun="true" print_local_addr="true" /> | <pbcast.STATE_TRANSFER up_thread="true" down_thread="true" /> View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3844894#3844894 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3844894 ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
