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java.lang.NullPointerException: 	at org.apache.log4j.LogManager.getLogger(LogManager.java:188)	at org.apache.log4j.Logger.getLogger(Logger.java:104)	at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:283)	at org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:171)	at org.activemq.store.journal.JournalPersistenceAdapter$3.run(JournalPersistenceAdapter.java:350)	at EDU.oswego.cs.dl.util.concurrent.QueuedExecutor$RunLoop.run(Unknown Source)	at java.lang.Thread.run(Thread.java:595)