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12.3.6. A Special Note About Oracle Databases

In our setup discussed in this chapter, we rely on the JBoss Enterprise Application Platform to automatically create needed tables in the external database upon server startup. That works most of the time. But for databases like Oracle, there might be some minor issues if you try to use the same database server to back more than one JBoss Enterprise Application Platform instance.
The Oracle database creates tables of the form schemaname.tablename. The TIMERS and HILOSEQUENCES tables needed by JBoss Enterprise Application Platform would not be created on a schema if the table already existed on a different schema. To work around this issue, you need to edit the $JBOSS_HOME/server/$PROFILE/deploy/ejb2-timer-service.xml file to change the table name from TIMERS to something like schemaname2.tablename. 
          <mbean code="org.jboss.ejb.txtimer.DatabasePersistencePolicy" 
          name="jboss.ejb:service=EJBTimerService,persistencePolicy=database">
          <!-- DataSourceBinding ObjectName -->
          <depends optional-attribute-name="DataSource">
          jboss.jca:service=DataSourceBinding,name=DefaultDS
          </depends>
          <!-- The plugin that handles database persistence -->
          <attribute name="DatabasePersistencePlugin">
          org.jboss.ejb.txtimer.GeneralPurposeDatabasePersistencePlugin
          </attribute>
          <!-- The timers table name -->
          <attribute name="TimersTable">TIMERS</attribute>
          </mbean>
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Similarly, you need to change the $JBOSS_HOME/server/$PROFILE/deploy/uuid-key-generator.sar/META-INF/jboss-service.xml file to change the table name from HILOSEQUENCES to something like schemaname2.tablename as well. 
 <!-- HiLoKeyGeneratorFactory --> <mbean
          code="org.jboss.ejb.plugins.keygenerator.hilo.HiLoKeyGeneratorFactory"
          name="jboss:service=KeyGeneratorFactory,type=HiLo">
          
          <depends>jboss:service=TransactionManager</depends>
          
          <!-- Attributes common to HiLo factory instances -->
          
          <!-- DataSource JNDI name -->
          <depends optional-attribute-name="DataSource">jboss.jca:service=DataSourceBinding,name=DefaultDS</depends>
          
          <!-- table name -->
          <attribute name="TableName">HILOSEQUENCES</attribute>
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Important

Oracle JDBC driver version 11.1.0.7.0 causes the JBoss Messaging Test Suite to fail with a SQLException ("Bigger type length than Maximum") on Oracle 11g R1.
This is caused by a regression in Oracle JDBC driver 11.1.0.7.0.
We recommend Oracle JDBC driver version 11.2.0.1.0 for use with Oracle 11g R1, Oracle 11g R2, Oracle RAC 11g R1 and Oracle RAC 11g R2.
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