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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-2757) AMQ startup fails during Startup due to NullPointerException in KahaDB
Date Mon, 12 Jul 2010 11:22:54 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Tully resolved AMQ-2757.
-----------------------------

    Resolution: Fixed

> AMQ startup fails during Startup due to NullPointerException in KahaDB
> ----------------------------------------------------------------------
>
>                 Key: AMQ-2757
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2757
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.2.0, 5.3.0, 5.3.1
>         Environment: Red Hat Enterprise Linux, Kernel V2.6.18
>            Reporter: Thomas Schöftner
>            Assignee: Gary Tully
>             Fix For: 5.4.0
>
>         Attachments: activemq.log, activemq.xml, wrapper.conf, wrapper.log
>
>
> During a long-time test run several message consumers listening to peristent queues crashed.
> The queues were filling up rapidly, so that KahaDB allocated 3GB of disk space (max.
limit 10GB) after 5hours (approx 800k messages).
> At that point the broker was extremely slow and non-responsive to new messages.
> JConsole showed that 1GB of RAM was used and most effort was necessary for garbage collection.
> Although the max memory usage limit is configured to 1GB, AMQ should rather allocate
disc space for messages to queues without containers.
> AMQ shutdown took extremely long (several limits).
> The subsequent AMQ restart keeps failing with the following exception:
> java.lang.NullPointerException
> 	at org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:109)
> 	at org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:120)
> 	at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$4.execute(KahaDBStore.java:223)
> 	at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
> 	at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recover(KahaDBStore.java:220)
> 	at org.apache.activemq.broker.region.Queue.initialize(Queue.java:252)
> 	at org.apache.activemq.broker.region.DestinationFactoryImpl.createDestination(DestinationFactoryImpl.java:83)
> 	at org.apache.activemq.broker.region.AbstractRegion.createDestination(AbstractRegion.java:464)
> 	at org.apache.activemq.broker.jmx.ManagedQueueRegion.createDestination(ManagedQueueRegion.java:56)
> 	at org.apache.activemq.broker.region.AbstractRegion.addDestination(AbstractRegion.java:120)
> 	at org.apache.activemq.broker.region.RegionBroker.addDestination(RegionBroker.java:268)
> 	at org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:142)
> 	at org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:142)
> 	at org.apache.activemq.broker.MutableBrokerFilter.addDestination(MutableBrokerFilter.java:149)
> 	at org.apache.activemq.broker.region.AbstractRegion.start(AbstractRegion.java:94)
> 	at org.apache.activemq.broker.region.RegionBroker.start(RegionBroker.java:178)
> 	at org.apache.activemq.broker.jmx.ManagedRegionBroker.start(ManagedRegionBroker.java:101)
> 	at org.apache.activemq.broker.BrokerFilter.start(BrokerFilter.java:154)
> 	at org.apache.activemq.broker.TransactionBroker.start(TransactionBroker.java:112)
> 	at org.apache.activemq.broker.BrokerService$3.start(BrokerService.java:1713)
> 	at org.apache.activemq.broker.BrokerService.start(BrokerService.java:473)
> 	at org.apache.activemq.xbean.XBeanBrokerService.afterPropertiesSet(XBeanBrokerService.java:85)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> ...
> The problem is reproducible also reproducible with recent nightly builds of AMQ/Fuse
5.4.0.
> -Tom

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