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http://issues.apache.org/bugzilla/show_bug.cgi?id=37747 Summary: Deadlock between SMTPAppender and RootLogger Product: Log4j Version: 1.2 Platform: PC OS/Version: Windows XP Status: NEW Severity: blocker Priority: P1 Component: Appender AssignedTo: [email protected] ReportedBy: [EMAIL PROTECTED] I am pretty shocked to have found this as we have been using 1.2.8 since it was released, but one of our testers can recreate this problem at will!! Here's the thread dump showing the deadlock: jvm 1 | Found one Java-level deadlock: jvm 1 | ============================= jvm 1 | "Thread-189": jvm 1 | waiting to lock monitor 0x286fa7b4 (object 0x06c2b8d8, a org.apache.log4j.net.SMTPAppender), jvm 1 | which is held by "Thread-98" jvm 1 | "Thread-98": jvm 1 | waiting to lock monitor 0x00b3ebf4 (object 0x06c57bc0, a org.apache.log4j.spi.RootLogger), jvm 1 | which is held by "Thread-189" jvm 1 | jvm 1 | Java stack information for the threads listed above: jvm 1 | =================================================== jvm 1 | "Thread-189": jvm 1 | at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:210) jvm 1 | - waiting to lock <0x06c2b8d8> (a org.apache.log4j.net.SMTPAppender) jvm 1 | at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:65) jvm 1 | at org.apache.log4j.Category.callAppenders(Category.java:203) jvm 1 | - locked <0x06c57bc0> (a org.apache.log4j.spi.RootLogger) jvm 1 | at org.apache.log4j.Category.forcedLog(Category.java:388) jvm 1 | at org.apache.log4j.Category.info(Category.java:663) jvm 1 | at uk.co.webessence.kernel.ApplicationLockManager.addLock(ApplicationLockManager.java:81) jvm 1 | at uk.co.webessence.kernel.database.LockHolder.getLocks(LockHolder.java:152) jvm 1 | - locked <0x08df4278> (a net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent) jvm 1 | at uk.co.webessence.kernel.database.LockHolder._getAllRequiredLocks(LockHolder.java:86) jvm 1 | - locked <0x08df4278> (a net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent) jvm 1 | at uk.co.webessence.kernel.database.LockHolder.getAllRequiredLocks(LockHolder.java:75) jvm 1 | - locked <0x08df4278> (a net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.getAllRequiredLocks(BackgroundProcess.java:173) jvm 1 | - locked <0x08df4278> (a net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.tryGetAllRequiredLocks(BackgroundProcess.java:234) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.waitForAllRequiredLocks(BackgroundProcess.java:212) jvm 1 | at net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent.processSwipe(ProcessRawEvent.java:156) jvm 1 | at net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent.doRun(ProcessRawEvent.java:74) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.run(BackgroundProcess.java:96) jvm 1 | at java.lang.Thread.run(Thread.java:595) jvm 1 | "Thread-98": jvm 1 | at org.apache.log4j.Category.callAppenders(Category.java:201) jvm 1 | - waiting to lock <0x06c57bc0> (a org.apache.log4j.spi.RootLogger) jvm 1 | at org.apache.log4j.Category.forcedLog(Category.java:388) jvm 1 | at org.apache.log4j.Category.fatal(Category.java:362) jvm 1 | at uk.co.webessence.utils.CriticalException.<init>(CriticalException.java:102) jvm 1 | - locked <0x06c2b8d8> (a org.apache.log4j.net.SMTPAppender) jvm 1 | at uk.co.webessence.utils.DatabaseException.<init>(DatabaseException.java:49) jvm 1 | at uk.co.webessence.kernel.persistence.PersistenceHandler.handleSQLException(PersistenceHandler.java:696) jvm 1 | at uk.co.webessence.kernel.persistence.PersistenceHandler.insert(PersistenceHandler.java:298) jvm 1 | at uk.co.webessence.kernel.RecordServer.handlePersistentAdd(RecordServer.java:2012) jvm 1 | at net.staffplanner.kernel.taexceptions.TelfRecordServer.handlePersistentAdd(TelfRecordServer.java:86) jvm 1 | at net.staffplanner.kernel.taexceptions.TaExceptionLogServer.handlePersistentAdd(TaExceptionLogServer.java:82) jvm 1 | at uk.co.webessence.kernel.RecordObject.flush(RecordObject.java:2393) jvm 1 | at uk.co.webessence.kernel.database.UserTransactionCache.commit(UserTransactionCache.java:247) jvm 1 | at uk.co.webessence.kernel.database.DatabaseTransaction.commit(DatabaseTransaction.java:137) jvm 1 | at net.staffplanner.kernel.taexceptions.processing.processSwipedEvent.matchRoundRecreateExceptionLogs(processSwipedEvent.java:203) jvm 1 | at net.staffplanner.kernel.taexceptions.processing.processSwipedEvent.doRun(processSwipedEvent.java:76) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.start(BackgroundProcess.java:80) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.start(BackgroundProcess.java:72) jvm 1 | at net.staffplanner.kernel.taexceptions.processing.ProcessRawEvent.doRun(ProcessRawEvent.java:76) jvm 1 | at uk.co.webessence.kernel.BackgroundProcess.run(BackgroundProcess.java:96) jvm 1 | at java.lang.Thread.run(Thread.java:595) jvm 1 | jvm 1 | Found 1 deadlock. jvm 1 | -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
