Getting the exception Inconsistent java and sql object types: SYS.XMLTYPE while trying to connect database through Data source in JBoss EAP 6

Issue

• We have JBoss EAP 6.4.0 on standalone mode.
• We are facing below Exception when we are trying to connect database through Data source and there is no exception when the database connection is direct.

START Exception --->

Inconsistent java and sql object types: SYS.XMLTYPE
oracle.sql.OPAQUE.toClass(OPAQUE.java:395)
oracle.sql.OPAQUE.toJdbc(OPAQUE.java:333)
oracle.sql.OPAQUE.toJdbc(OPAQUE.java:314)
oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:227)
oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:123)
oracle.jdbc.driver.OracleCallableStatement.getObject(OracleCallableStatement.java:2049)
oracle.jdbc.driver.OracleCallableStatementWrapper.getObject(OracleCallableStatementWrapper.java:818)
org.jboss.jca.adapters.jdbc.WrappedCallableStatement.getObject(WrappedCallableStatement.java:93)
...
<--- END Exception

• The JDBC code snippet looks like below:

                Connection con = null;
        CallableStatement st = null;
        Document doc = null;
        try
        {
        con = // invoke getConnection(...) to get the datasource connection from pool;
        st = con.prepareCall("{call MyPROC(?,?,?,?,?,?,?,?)}");
        st.setString(1, );
            st.setString(2, );
            st.setString(3, );
            st.setString(4, );
            st.setString(5, );
            st.setString(6, );
            st.setString(7, );
            st.registerOutParameter(8, OracleTypes.OPAQUE, "SYS.XMLTYPE" );
            st.execute();
            doc = XMLType.createXML((OPAQUE)st.getObject(8)).getDOM();

            return doc;
        } 
        catch (Exception ex) 
        {
            ex.printStackTrace();
        }
        finally 
        {
            // invoke cleanUp(...);
        }