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From "Dejan Bosanac (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-2436) JDBC synchronization problems under high load
Date Fri, 02 Oct 2009 10:45:00 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dejan Bosanac resolved AMQ-2436.
--------------------------------

    Resolution: Fixed

Resolved with SVN revision 820955

> JDBC synchronization problems under high load
> ---------------------------------------------
>
>                 Key: AMQ-2436
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2436
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.3.0
>            Reporter: Dejan Bosanac
>            Assignee: Dejan Bosanac
>             Fix For: 5.3.0
>
>
> It's possible to get exception like this
> {code}
> java.lang.NullPointerException
>         at java.util.TreeMap.rotateLeft(TreeMap.java:1261)
>         at java.util.TreeMap.fixAfterInsertion(TreeMap.java:1328)
>         at java.util.TreeMap.put(TreeMap.java:483)
>         at java.util.TreeSet.add(TreeSet.java:210)
>         at org.apache.activemq.store.jdbc.adapter.DefaultJDBCAdapter.doRecoverNextMessages(DefaultJDBCAdapter.java:751)
>         at org.apache.activemq.store.jdbc.JDBCMessageStore.recoverNextMessages(JDBCMessageStore.java:214)
>         at org.apache.activemq.store.ProxyMessageStore.recoverNextMessages(ProxyMessageStore.java:87)
>         at org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:81)
>         at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:227)
>         at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.hasNext(AbstractStoreCursor.java:134)
>         at org.apache.activemq.broker.region.cursors.StoreQueueCursor.hasNext(StoreQueueCursor.java:131)
>         at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1280)
>         at org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1419)
>         at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1103)
>         at org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)
>         at org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
>         at java.lang.Thread.run(Thread.java:595)
> {code}
> if you run multiple producers/consumers in high load environment using JDBC persistence.

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