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Date: Sun, 22 Mar 2009 14:55:50 -0700 (PDT)
From: "Ronald Tschalaer (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Created: (DERBY-4109) Java-level deadlock in
 XATransactionState
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Java-level deadlock in XATransactionState
-----------------------------------------

                 Key: DERBY-4109
                 URL: https://issues.apache.org/jira/browse/DERBY-4109
             Project: Derby
          Issue Type: Bug
          Components: JDBC
    Affects Versions: 10.4.2.0
         Environment: Linux, Sun jdk 1.6.0_12 (64-bit)
            Reporter: Ronald Tschalaer


Due to some other issue in derby (a hang in ActiveLock.waitForGrant
while executing a prepared-statement), the transaction times out at
which point Derby hits the following java-level deadlock (from the
jvm thread-dump):


Found one Java-level deadlock:
=============================
"Thread-6":
  waiting to lock monitor 0x00002aaaf43d2ec8 (object 0x00002aaadcce9070, a org.apache.derby.jdbc.XATransactionState),
  which is held by "Timer-0"
"Timer-0":
  waiting to lock monitor 0x00002aaaf43d75a8 (object 0x00002aaadcce2e60, a org.apache.derby.impl.jdbc.EmbedConnection40),
  which is held by "Thread-6"

Java stack information for the threads listed above:
===================================================
"Thread-6":
        at org.apache.derby.jdbc.XATransactionState.cleanupOnError(Unknown Source)
        - waiting to lock <0x00002aaadcce9070> (a org.apache.derby.jdbc.XATransactionState)
        at org.apache.derby.iapi.services.context.ContextManager.cleanupOnError(Unknown Source)
        at org.apache.derby.impl.jdbc.TransactionResourceImpl.cleanupOnError(Unknown Source)
        at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
        at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
        - locked <0x00002aaadcce2e60> (a org.apache.derby.impl.jdbc.EmbedConnection40)
        at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
        - locked <0x00002aaadcce2e60> (a org.apache.derby.impl.jdbc.EmbedConnection40)
        at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
        at org.apache.derby.iapi.jdbc.BrokeredStatement.execute(Unknown Source)
        at org.fedoracommons.akubra.txn.derby.TransactionalConnection.beforeCompletion(TransactionalConnection.java:293)
        at bitronix.tm.BitronixTransaction.fireBeforeCompletionEvent(BitronixTransaction.java:366)
        at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:142)
        at bitronix.tm.BitronixTransactionManager.commit(BitronixTransactionManager.java:96)
        at org.fedoracommons.akubra.txn.derby.TestTransactionalStore.doInTxn(TestTransactionalStore.java:759)
        at org.fedoracommons.akubra.txn.derby.TestTransactionalStore.access$900(TestTransactionalStore.java:60)
        at org.fedoracommons.akubra.txn.derby.TestTransactionalStore$4.erun(TestTransactionalStore.java:586)
        at org.fedoracommons.akubra.txn.derby.TestTransactionalStore$ERunnable.run(TestTransactionalStore.java:803)
        at java.lang.Thread.run(Thread.java:619)
"Timer-0":
        at org.apache.derby.impl.jdbc.EmbedConnection.xa_rollback(Unknown Source)
        - waiting to lock <0x00002aaadcce2e60> (a org.apache.derby.impl.jdbc.EmbedConnection40)
        at org.apache.derby.jdbc.XATransactionState.cancel(Unknown Source)
        - locked <0x00002aaadcce9070> (a org.apache.derby.jdbc.XATransactionState)
        at org.apache.derby.jdbc.XATransactionState.access$000(Unknown Source)
        at org.apache.derby.jdbc.XATransactionState$CancelXATransactionTask.run(Unknown Source)
        at java.util.TimerThread.mainLoop(Timer.java:512)
        at java.util.TimerThread.run(Timer.java:462)

Found 1 deadlock.


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