'UnknownHostException' related to OSB cluster in AdminServer logs

Problem

You have an OSB cluster running with two managed servers; osb_server1 and osb_server2.

In the AdminServer logs, you see the following:

<Feb 27, 2012 6:13:21 PM EST> <Notice> <Cluster> <BEA-000197> <Listening for announcements from cluster using unicast cluster messaging>

<Feb 27, 2012 6:13:21 PM EST> <Notice> <Cluster> <BEA-000133> <Waiting to synchronize with other running members of osbcluster.>

<Feb 27, 2012 6:13:51 PM EST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to ADMIN>

<Feb 27, 2012 6:13:51 PM EST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RESUMING>

<Feb 27, 2012 6:13:52 PM EST> <Notice> <Cluster> <BEA-000162> <Starting "async" replication service with remote cluster address "soahost1:8011,soahost2:8011">

<Feb 27, 2012 6:13:53 PM EST> <Notice> <Server> <BEA-002613> <Channel "Default" is now listening on 192.168.97.112:8011 for protocols iiop, t3, CLUSTER-BROADCAST, ldap, snmp, http.>

<Feb 27, 2012 6:13:53 PM EST> <Notice> <WebLogicServer> <BEA-000330> <Started WebLogic Managed Server "osb_server2" for domain "soa_domain" running in Production Mode>

<Feb 27, 2012 6:14:00 PM EST> <Error> <ALSB Statistics Manager> <BEA-473003> <Aggregation Server Not Available. Failed to get remote aggregator

java.rmi.UnknownHostException: Could not discover URL for server 'osb_server1'

        at weblogic.protocol.URLManager.findURL(URLManager.java:145)

        at com.bea.alsb.platform.weblogic.topology.WlsRemoteServerImpl.getInitialContext(WlsRemoteServerImpl.java:94)

        at com.bea.alsb.platform.weblogic.topology.WlsRemoteServerImpl.lookupJNDI(WlsRemoteServerImpl.java:54)

        at com.bea.wli.monitoring.statistics.ALSBStatisticsManager.getRemoteAggregator(ALSBStatisticsManager.java:291)

        at com.bea.wli.monitoring.statistics.ALSBStatisticsManager.access$000(ALSBStatisticsManager.java:38)

        Truncated. see log file for complete stacktrace

>

<Feb 27, 2012 6:14:11 PM EST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RUNNING>

<Feb 27, 2012 6:14:11 PM EST> <Notice> <WebLogicServer> <BEA-000360> <Server started in RUNNING mode>

Solution

1. The osb_server1 is not running. Simply start it up.

Applicable Versions

• Oracle WebLogic Server 11g
• Oracle Service Bus 11g