Hi all, I'm trying to setup MMbase to run in a cluster environment. So far I failed however and I'm running out of options to try. Maybe someone reading this will be able to point me in the right direction.
The relevant part of my MMbase configuration: node 1: <property name="machinename">ou.work2</property> <property name="multicasthost">226.0.0.2</property> <property name="multicastport">9119</property> <property name="host">work2.esp</property> node 2: <property name="machinename">ou.work3</property> <property name="multicasthost">226.0.0.2</property> <property name="multicastport">9119</property> <property name="host">work3.esp</property> To avoid confusion, work2.esp and work3.esp do resolve to a valid IP address (we're using a private tld's inside our cluster) The weird thing is that I don't see any MMbase multicast traffic going over the wire when sniffing, using "tcpdump ip multicast. I do see muticast traffic coming from both Tomcat processes, but it's addressed to port 8012 which seem to be some default value. Multicast is active on the OS layer as ifconfig is telling me my NIC is running in multicast mode and I'm able to ping 224.0.0.1 and receive a response from all machines. I've a feeling I'm missing some sort of master switch, which I need to turn from false to true to enable MMbase clustering. Something I noticed in the log when editing nodes (which should trigger multicast traffic): 2006-03-23 11:34:14,382 WARN mmbase.module.core.ClusterBuilder addRelationDirections.1656 - No relation defined between educations and images using RelationStep(tablename:pos2rel, alias:pos2rel, nodes:[], dir:destination, role:498) with direction(s) BOTH. Searching in 'destination' direction now, but perhaps the query should be fixed, because this should always result nothing.2006-03-23 11:20:04,826 FATAL STDERR println.258 - java.lang.NullPointerException 2006-03-23 11:20:04,827 WARN STDERR println.250 - at org.mmbase.module.builders.MMEvents.probeCall(MMEvents.java:119) 2006-03-23 11:20:04,827 WARN STDERR println.250 - at org.mmbase.module.builders.MMEventsProbe.run(MMEventsProbe.java:56) 2006-03-23 11:20:04,828 WARN STDERR println.250 - at java.lang.Thread.run(Thread.java:534) I'm told however this is should not be directly related to my multicast problem. Somebody who has an idea of what I'm missing? Thanks in advance for any input! Arjen Roodselaar
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