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java.sql.SQLException: Already closed.	at org.apache.commons.dbcp.PoolableConnection.close(PoolableConnection.java:84)	at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.close(PoolingDataSource.java:181)	at org.apache.activemq.store.jdbc.TransactionContext.close(TransactionContext.java:135)	at org.apache.activemq.store.jdbc.JDBCMessageStore.getMessageCount(JDBCMessageStore.java:198)	at org.apache.activemq.store.ProxyMessageStore.getMessageCount(ProxyMessageStore.java:83)	at org.apache.activemq.broker.region.cursors.QueueStorePrefetch.getStoreSize(QueueStorePrefetch.java:63)	at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.remove(AbstractStoreCursor.java:185)	at org.apache.activemq.broker.region.cursors.StoreQueueCursor.remove(StoreQueueCursor.java:141)	at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1367)	at org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1503)	at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1178)	at org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)	at org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)