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com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException: Connection.close() has already been called. Invalid operation in this state.	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)	at com.mysql.jdbc.ConnectionImpl.getMutex(ConnectionImpl.java:3018)	at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4827)	at com.mchange.v2.c3p0.impl.NewProxyConnection.setAutoCommit(NewProxyConnection.java:881)	at org.hibernate.transaction.JDBCTransaction.toggleAutoCommit(JDBCTransaction.java:228)	at org.hibernate.transaction.JDBCTransaction.commitAndResetAutoCommit(JDBCTransaction.java:173)	at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:146)	at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:655)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:732)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:701)	at org.compass.spring.transaction.SpringSyncTransaction.doCommit(SpringSyncTransaction.java:135)	at org.compass.core.transaction.AbstractTransaction.commit(AbstractTransaction.java:46)	at org.compass.core.CompassTemplate.execute(CompassTemplate.java:134)	at org.compass.gps.impl.SingleCompassGps.executeForIndex(SingleCompassGps.java:147)	at org.compass.gps.device.support.parallel.ConcurrentParallelIndexExecutor$1.call(ConcurrentParallelIndexExecutor.java:102)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)	at java.util.concurrent.FutureTask.run(FutureTask.java:123)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)	at java.lang.Thread.run(Thread.java:595)