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From "Gary Tully (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-3637) NullPointerException while loading node from kahadb during vmcursor replay
Date Thu, 15 Dec 2011 17:36:30 GMT
NullPointerException while loading node from kahadb during vmcursor replay
--------------------------------------------------------------------------

                 Key: AMQ-3637
                 URL: https://issues.apache.org/jira/browse/AMQ-3637
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.5.1
            Reporter: Gary Tully
            Assignee: Gary Tully
             Fix For: 5.6.0


When the vmQueueCursor is used with persistent messages that have a time to live (ttl) expiry
set. If the broker down time exceeds the ttl, on recovery the messages are replayed through
the vm cursor and an expiry check is done, leading to the messages getting deleted. This nested
kahaDB transaction (to remove the message) can badly effect the iterator traversing the store,
leading to missed messages and the NPE below. The recovery processing needs to be batched
such that periodic expiry can occur with out nesting transactions.
{code}INFO | Recovery replayed 7784653 operations from the journal in 895.065 seconds.
 INFO | ActiveMQ 5.5.1-fuse-01-11 JMS Message Broker () is starting
 INFO | For help or more information please see: http://activemq.apache.org/
ERROR | Failed to start ActiveMQ JMS Message Broker (). Reason: java.lang.NullPointerException
java.lang.NullPointerException
	at org.apache.kahadb.index.BTreeIndex.loadNode(BTreeIndex.java:264)
	at org.apache.kahadb.index.BTreeNode$BTreeIterator.findNextPage(BTreeNode.java:103)
	at org.apache.kahadb.index.BTreeNode$BTreeIterator.hasNext(BTreeNode.java:121)
	at org.apache.activemq.store.kahadb.MessageDatabase$MessageOrderIndex$MessageOrderIterator.hasNext(MessageDatabase.java:2597)
	at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$3.execute(KahaDBStore.java:506)
	at org.apache.kahadb.page.Transaction.execute(Transaction.java:760)
	at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recover(KahaDBStore.java:502)
	at org.apache.activemq.store.ProxyMessageStore.recover(ProxyMessageStore.java:52)
	at org.apache.activemq.broker.region.Queue.initialize(Queue.java:267)
	at org.apache.activemq.broker.region.DestinationFactoryImpl.createDestination(DestinationFactoryImpl.java:86)
	at org.apache.activemq.broker.region.AbstractRegion.createDestination(AbstractRegion.java:487)
	at org.apache.activemq.broker.region.AbstractRegion.addDestination(AbstractRegion.java:125)
	at org.apache.activemq.broker.region.RegionBroker.addDestination(RegionBroker.java:301)
	at org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:145)
	at org.apache.activemq.advisory.AdvisoryBroker.addDestination(AdvisoryBroker.java:145)
	at org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:145)
	at org.apache.activemq.broker.BrokerFilter.addDestination(BrokerFilter.java:145)
	at org.apache.activemq.broker.MutableBrokerFilter.addDestination(MutableBrokerFilter.java:151)
	at org.apache.activemq.broker.region.AbstractRegion.start(AbstractRegion.java:97)
	at org.apache.activemq.broker.region.RegionBroker.start(RegionBroker.java:201)
	at org.apache.activemq.broker.BrokerFilter.start(BrokerFilter.java:157)
	at org.apache.activemq.broker.BrokerFilter.start(BrokerFilter.java:157)
	at org.apache.activemq.broker.TransactionBroker.start(TransactionBroker.java:123)
	at org.apache.activemq.broker.BrokerService$3.start(BrokerService.java:1814)
	at org.apache.activemq.broker.BrokerService.start(BrokerService.java:494)
	at ...
 INFO | ActiveMQ Message Broker (null) is shutting down{code}

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