NullPointerException raised by OracleResultSetImpl.getObject(int) in JBoss EAP

Issue

• The exception below is observed in the server.log.

  ... java.lang.NullPointerException
          at oracle.jdbc.driver.NamedTypeAccessor.getOracleObject(NamedTypeAccessor.java:302)
          at oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:164)
          at oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:121)
          at oracle.jdbc.driver.OracleResultSetImpl.getObject(OracleResultSetImpl.java:1108)
          at org.jboss.jca.adapters.jdbc.WrappedResultSet.getObject(WrappedResultSet.java:1644)
          ...
  

• The object being retrieved is XML but the libraries required by Oracle for XML access are already in the JBoss module used for the configured Oracle datasource.

  <?xml version="1.0" ?>
  <module xmlns="urn:jboss:module:1.1" name="com.oracle.jdbc">
      <resources>
          <resource-root path="ojdbc6.jar"/>
          <resource-root path="xdb6.jar"/>
          <resource-root path="xmlparserv2.jar"/>
      </resources>
      <dependencies>
          <module name="javax.api"/>
          <module name="javax.transaction.api"/>
      </dependencies>
  </module>