Hi, when using this method

public List<Field> getFieldWithoutId(List<Integer> idSections) throws Exception {
    try {
        Connection conn = this.getConnection();
        Array arraySections = conn.createArrayOf("int4", idSections.toArray());
        this.log.info("Recupero field");
        List<Field> fields = this.getJdbcTemplate().query(getFieldWithoutIdQuery, new Object[] {arraySections},ParameterizedBeanPropertyRowMapper.newInstance(Field.class));
        /*if (!conn.isClosed())
            conn.close();
        */
        releaseConnection(conn);
        return fields;
    } catch (Exception e) {
        e.printStackTrace();
        throw new Exception("Errore.");
    }
}

I have an exception at conn.createArrayOf("int4", idSections.toArray());.

The exception is:

javax.ejb.EJBException : Unexpected Error
java.lang.AbstractMethodError: org.jboss.resource.adapter.jdbc.jdk5.WrappedConnectionJDK5.createArrayOf(Ljava/lang/String;[Ljava/lang/Object;)Ljava/sql/Array;

postgresql-8.4-701.jdbc4.jar is in jboss/server/all/lib dir. Application is spring based with ejb3.

When working locally with the same setup everything is fine. This only happens on a preproduction environment. Only difference is locally I have jboss run in default mode, in the other case there are 2 jbosses in all configuration. I can't track down the cause of this error. Could someone help me please?