It maybe related to https://issues.apache.org/jira/browse/OPENJPA-542:
return EMPTY_CLOB = (Clob) Class.forName("oracle.sql.CLOB",true, AccessController.doPrivileged(J2DoPrivHelper .getContextClassLoaderAction())). getMethod("empty_lob", new Class[0]). invoke(null, new Object[0]); -- View this message in context: http://openjpa.208410.n2.nabble.com/oracle-clob-exception-tp7580960p7580961.html Sent from the OpenJPA Users mailing list archive at Nabble.com.