...
Caused by: java.lang.reflect.UndeclaredThrowableException: null
	at com.sun.proxy.$Proxy72.hashCode(Unknown Source) ~[na:na]
	at java.util.HashMap.hash(HashMap.java:351) ~[na:1.7.0_25]
	at java.util.HashMap.getEntry(HashMap.java:443) ~[na:1.7.0_25]
	at java.util.HashMap.get(HashMap.java:405) ~[na:1.7.0_25]
	at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.release(JdbcCoordinatorImpl.java:399) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.releaseStatements(AbstractBatchImpl.java:173) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:76) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3124) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3587) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:103) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:453) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:345) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:56) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1218) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:421) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177) ~[hibernate-core-4.3.0.Final.jar:4.3.0.Final]
	at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:77) ~[hibernate-entitymanager-4.3.0.Final.jar:4.3.0.Final]
	... 90 common frames omitted
Caused by: java.sql.SQLException: Statement closed.
	at org.apache.tomcat.jdbc.pool.interceptor.AbstractQueryReport$StatementProxy.invoke(AbstractQueryReport.java:225) ~[tomcat-jdbc.jar:na]
	... 109 common frames omitted

@Override
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            //get the name of the method for comparison
            final String name = method.getName();
            //was close invoked?
            boolean close = compare(JdbcInterceptor.CLOSE_VAL,name);
            //allow close to be called multiple times
            if (close && closed) return null;
            //are we calling isClosed?
            if (compare(JdbcInterceptor.ISCLOSED_VAL,name)) return Boolean.valueOf(closed);
            //if we are calling anything else, bail out
            if (closed) throw new SQLException("Statement closed.");

final Set<ResultSet> resultSets = xref.get( statement );

jdbcInterceptors="ConnectionState;StatementFinalizer;ResetAbandonedTimer;"