Hi all,
I was running ESB Sample 57 [1] on ESB 4.8.0 and got the stack trace below.
I referred two mailing threads [2] [3] which discussed about the same error
before. Even after configuring the domain as suggested i still get the
error "ERROR_EXCEPTION : org.apache.synapse.SynapseException: A
LoadBalanceEventHandler has not been specified in the axis2.xml file for
the domain apache.axis2.application.domain".
I was able to run the sample on the ESB 4.7.0 with the
"org.apache.axis2.clustering.tribes.TribesClusteringAgent" enabled. But was
unable to run the sample on ESB 4.8.0 with the
"org.wso2.carbon.core.clustering.hazelcast.HazelcastClusteringAgent". As i
understood from [3] this is due to the fact that axis2Server uses
TribesClusteringAgent while the ESB 4.8.0 uses the HazelcastClusteringAgent.
Is there any workaround/fix for this issue?
Stack trace on ESB 4.8.0 >
[2014-04-07 11:46:23,149] DEBUG - SynapseMessageReceiver Synapse received a
new message for message mediation...
[2014-04-07 11:46:23,150] DEBUG - SynapseMessageReceiver Received To:
/services/LBService1
[2014-04-07 11:46:23,150] DEBUG - SynapseMessageReceiver SOAPAction:
urn:sampleOperation
[2014-04-07 11:46:23,150] DEBUG - SynapseMessageReceiver WSA-Action:
urn:sampleOperation
[2014-04-07 11:46:23,150] DEBUG - Axis2SynapseEnvironment Injecting
MessageContext
[2014-04-07 11:46:23,150] DEBUG - Axis2SynapseEnvironment Using Main
Sequence for injected message
[2014-04-07 11:46:23,151] DEBUG - SequenceMediator Start : Sequence <main>
[2014-04-07 11:46:23,151] DEBUG - SequenceMediator Setting the onError
handler : errorHandler for the sequence : main
[2014-04-07 11:46:23,151] DEBUG - SequenceMediator Sequence
<SequenceMediator> :: mediate()
[2014-04-07 11:46:23,151] DEBUG - SequenceMediator Mediation started from
mediator position : 0
[2014-04-07 11:46:23,151] DEBUG - InMediator Start : In mediator
[2014-04-07 11:46:23,151] DEBUG - InMediator Current message is incoming -
executing child mediators
[2014-04-07 11:46:23,151] DEBUG - InMediator Sequence <InMediator> ::
mediate()
[2014-04-07 11:46:23,152] DEBUG - InMediator Mediation started from
mediator position : 0
[2014-04-07 11:46:23,152] DEBUG - SendMediator Start : Send mediator
[2014-04-07 11:46:23,152] DEBUG - DynamicLoadbalanceEndpoint Couldn't find
the Cookie header to find the session
[2014-04-07 11:46:23,152] ERROR - Axis2LoadBalanceMembershipHandler A
LoadBalanceEventHandler has not been specified in the axis2.xml file for
the domain apache.axis2.application.domain
[2014-04-07 11:46:23,152] WARN - SynapseMessageReceiver Executing fault
handler due to exception encountered
[2014-04-07 11:46:23,152] WARN - FaultHandler ERROR_CODE : 0
[2014-04-07 11:46:23,152] WARN - FaultHandler ERROR_MESSAGE : A
LoadBalanceEventHandler has not been specified in the axis2.xml file for
the domain apache.axis2.application.domain
[2014-04-07 11:46:23,153] WARN - FaultHandler ERROR_DETAIL :
org.apache.synapse.SynapseException: A LoadBalanceEventHandler has not been
specified in the axis2.xml file for the domain
apache.axis2.application.domain
at
org.apache.synapse.core.axis2.Axis2LoadBalanceMembershipHandler.setConfigurationContext(Axis2LoadBalanceMembershipHandler.java:77)
at
org.apache.synapse.endpoints.DynamicLoadbalanceEndpoint.send(DynamicLoadbalanceEndpoint.java:115)
at
org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:97)
at
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:77)
at
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:47)
at
org.apache.synapse.mediators.filters.InMediator.mediate(InMediator.java:61)
at
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:77)
at
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:47)
at
org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:131)
at
org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:228)
at
org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:83)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at
org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:404)
at
org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:184)
at
org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
[2014-04-07 11:46:23,153] WARN - FaultHandler ERROR_EXCEPTION :
org.apache.synapse.SynapseException: A LoadBalanceEventHandler has not been
specified in the axis2.xml file for the domain
apache.axis2.application.domain
[2014-04-07 11:46:23,153] WARN - FaultHandler FaultHandler :
org.apache.synapse.mediators.MediatorFaultHandler@5017d906
[2014-04-07 11:46:23,153] WARN - MediatorFaultHandler Executing fault
handler mediator : errorHandler
[2014-04-07 11:46:23,153] DEBUG - SequenceMediator Start : Sequence
<errorHandler>
[2014-04-07 11:46:23,153] DEBUG - SequenceMediator Sequence
<SequenceMediator> :: mediate()
[2014-04-07 11:46:23,153] DEBUG - SequenceMediator Mediation started from
mediator position : 0
[2014-04-07 11:46:23,161] DEBUG - FaultMediator Start : Fault mediator
[2014-04-07 11:46:23,161] DEBUG - FaultMediator Creating a SOAP 1.1 fault
[2014-04-07 11:46:23,164] DEBUG - FaultMediator End : Fault mediator
[2014-04-07 11:46:23,164] DEBUG - SendMediator Start : Send mediator
[2014-04-07 11:46:23,164] DEBUG - SendMediator Sending response message
using implicit message properties..
Sending To: http://www.w3.org/2005/08/addressing/anonymous
SOAPAction: urn:sampleOperation
[2014-04-07 11:46:23,169] DEBUG - SendMediator End : Send mediator
[2014-04-07 11:46:23,170] DEBUG - SequenceMediator End : Sequence
<errorHandler>
[1]
https://docs.wso2.org/display/ESB481/Sample+57%3A+Dynamic+load+balancing+between+3+nodes
[2] [Dev] WSO2 WSB Sample 57: Dynamic load balancing between 3 nodes -
Missing LoadBalanceEventHandler -
http://wso2-oxygen-tank.10903.n7.nabble.com/Dev-WSO2-WSB-Sample-57-Dynamic-load-balancing-between-3-nodes-Missing-LoadBalanceEventHandler-td89942.html
[3] [Dev] Running ESB sample 57 -
http://wso2-oxygen-tank.10903.n7.nabble.com/Dev-Running-ESB-sample-57-td89484.html
Thanks.
-Gayashan
--
Gayashan Amarasinghe
Software Engineer, WSO2 Inc.
Mobile: +94718314517
Blog: gayashan-a.blogspot.com
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