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Re: connecting a remote hornetQ server
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created by <a href="https://community.jboss.org/people/anso2">andrzej sochal</a> in <i>JBoss AS 7 Development</i> - <a href="https://community.jboss.org/message/759409#759409">View the full discussion</a>
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<div class="jive-rendered-content"><p>I have a similar problem. My scenario is as follows:</p><p>Messages are being sent from jboss-4.2.1.GA to a remote stand alone hornetq-2.2.14.Final.</p><p>There is an MDB deployed on jboss-7.1.1.Final node that listens to the remote stand alone hornetq-2.2.14.Final queue.</p><p>Everything seems to be working fine up to the point where there is a disconnection </p><p>between jboss 7 node and hornetq. For example, when hornetq is shut down and then brought back up, jboss</p><p>jboss 7 is not able to reconnect to hornetq. Jboss 4 on the other hand is able to send messages to hornetq but messages are not</p><p>being consumed by MDB.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This warning happens every two minutes on jboss 7 node:</p><p>  </p><p>2012-09-13 07:59:26,904 WARN  [com.arjuna.ats.jta] (Periodic Recovery:) ARJUNA016027: Local XARecoveryModule.xaRecovery got XA exception XAException.XAER_RMERR: javax.transaction.xa.XAException: Error</p><p> trying to connect to any providers for xa recovery</p><p>        at org.hornetq.jms.server.recovery.HornetQXAResourceWrapper.getDelegate(HornetQXAResourceWrapper.java:275)</p><p>        at org.hornetq.jms.server.recovery.HornetQXAResourceWrapper.recover(HornetQXAResourceWrapper.java:77)</p><p>        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.xaRecovery(XARecoveryModule.java:503)</p><p>        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.resourceInitiatedRecoveryForRecoveryHelpers(XARecoveryModule.java:471)</p><p>        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.bottomUpRecovery(XARecoveryModule.java:385)</p><p>        at com.arjuna.ats.internal.jta.recovery.arjunacore.XARecoveryModule.periodicWorkSecondPass(XARecoveryModule.java:166)</p><p>        at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.doWorkInternal(PeriodicRecovery.java:789)</p><p>        at com.arjuna.ats.internal.arjuna.recovery.PeriodicRecovery.run(PeriodicRecovery.java:371)</p><p>Caused by: java.lang.IllegalStateException: Cannot create session factory, server locator is closed (maybe it has been garbage collected)</p><p>        at org.hornetq.core.client.impl.ServerLocatorImpl.assertOpen(ServerLocatorImpl.java:1823)</p><p>        at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:699)</p><p>        at org.hornetq.jms.server.recovery.HornetQXAResourceWrapper.connect(HornetQXAResourceWrapper.java:321)</p><p>        at org.hornetq.jms.server.recovery.HornetQXAResourceWrapper.getDelegate(HornetQXAResourceWrapper.java:251)</p><p>        ... 7 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>After doing some research, I found that:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>HornetQXAResourceWrapper located in JBOSS_HOME\modules\org\hornetq\main\hornetq-jms-2.2.13.Final.jar</p><p>is trying to connect to HornetQ in this method:</p><p> public XAResource getDelegate(boolean retry){</p><p>  XAResource result = null;</p><p>     Exception error = null;</p><p>     try</p><p>     {</p><p>      <strong> result = connect();</strong></p><p>     }</p><p>     catch (Exception e)</p><p>     {</p><p>       error = e;</p><p>     }</p><p>     ...</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> The connect method is getting ServerLocatorImp object and calls createSessionFactory method on it</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    ... </p><p>    this.serverLocator = xaRecoveryConfig.getHornetQConnectionFactory().getServerLocator();</p><p>    this.serverLocator.disableFinalizeCheck();</p><p>    this.csf = this.serverLocator.createSessionFactory();</p><p>    ...</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The createSessionFactory method of ServerLocatorImpl (hornetq-core-2.2.13.Final) is checking for ServerLocator state.</p><p>If it is NOT null and NOT initialized then it throws this exception.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    if (state != null && state != STATE.INITIALIZED)</p><p>    {</p><p>         throw new IllegalStateException("Cannot create session factory, server locator is closed (maybe it has been garbage collected)");</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When I manually change state to null, this exception is no longer thrown and the state gets initialized again.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When there is a disconnection, it looks like state gets set to CLOSED which is triggering this exception. </p><p>Instead, shouldn't state be set to NULL on disconnect to allow for reconnections. </p><p>Is this a bug???</p></div>
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