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java.lang.NullPointerException: 	at org.apache.derby.impl.store.raw.log.LogToFile.getFirstLogNeeded(Unknown Source)	at org.apache.derby.impl.store.raw.log.LogToFile.deleteObsoleteLogfiles(Unknown Source)	at org.apache.derby.impl.store.raw.log.LogToFile.stop(Unknown Source)	at org.apache.derby.impl.services.monitor.TopService.stop(Unknown Source)	at org.apache.derby.impl.services.monitor.TopService.shutdown(Unknown Source)	at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)	at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)	at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)	at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)	at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)	at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)	at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)	at org.apache.derby.impl.jdbc.EmbedConnection.(Unknown Source)	at org.apache.derby.impl.jdbc.EmbedConnection30.(Unknown Source)	at org.apache.derby.jdbc.Driver30.getNewEmbedConnection(Unknown Source)	at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)	at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)	at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)