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From "Johno Crawford (Issue Comment Edited) (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (AMQ-3804) NullPointerException logged every 30 seconds while attempting to clear expired messages
Date Mon, 16 Apr 2012 17:12:16 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13254814#comment-13254814
] 

Johno Crawford edited comment on AMQ-3804 at 4/16/12 5:10 PM:
--------------------------------------------------------------

If the stacktrace is fresh this could just mean that the stored destination does not have
any message references to the given message sequence (returns null) and when we try and unbox
the Long we hit an NPE.
                
      was (Author: johno):
    If the stacktrace is fresh this could just mean that the stored destination does not have
any message references to the given message sequence and when we try and unbox the long we
hit an NPE.
                  
> NullPointerException logged every 30 seconds while attempting to clear expired messages

> ----------------------------------------------------------------------------------------
>
>                 Key: AMQ-3804
>                 URL: https://issues.apache.org/jira/browse/AMQ-3804
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.6.0
>         Environment: Windows XP SP3
>            Reporter: Rajib Rashid
>             Fix For: 5.6.0
>
>
> this is a duplicate of AMQ-3677 which was marked resolved. however i am still noticing
this issue using the 5.6 snapshot release from apr 11, 2012. in this case activemq server
was shutdown by terminating the java process. when the server is started again, following
exception is logged every 30 seconds:
> {code}
> 2012-04-11 14:06:53,786 org.apache.activemq.broker.region.Topic[ActiveMQ Broker[ZyrionMessageBus]
Scheduler]: (ERROR) (   Topic.java:683) Failed to remove expired Message from the store 
> java.lang.NullPointerException
> 	at org.apache.activemq.store.kahadb.MessageDatabase.removeAckLocation(MessageDatabase.java:2005)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.updateIndex(MessageDatabase.java:1259)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$15.execute(MessageDatabase.java:1046)
> 	at org.apache.kahadb.page.Transaction.execute(Transaction.java:769)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.process(MessageDatabase.java:1044)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$13.visit(MessageDatabase.java:977)
> 	at org.apache.activemq.store.kahadb.data.KahaRemoveMessageCommand.visit(KahaRemoveMessageCommand.java:220)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.process(MessageDatabase.java:969)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.store(MessageDatabase.java:881)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.store(MessageDatabase.java:863)
> 	at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBTopicMessageStore.doAcknowledge(KahaDBStore.java:715)
> 	at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBTopicMessageStore.acknowledge(KahaDBStore.java:701)
> 	at org.apache.activemq.store.kahadb.KahaDBTransactionStore.acknowledge(KahaDBTransactionStore.java:519)
> 	at org.apache.activemq.store.kahadb.KahaDBTransactionStore$2.acknowledge(KahaDBTransactionStore.java:222)
> 	at org.apache.activemq.broker.region.Topic.acknowledge(Topic.java:489)
> 	at org.apache.activemq.broker.region.Topic.messageExpired(Topic.java:681)
> 	at org.apache.activemq.broker.region.Topic.doBrowse(Topic.java:562)
> 	at org.apache.activemq.broker.region.Topic.access$100(Topic.java:62)
> 	at org.apache.activemq.broker.region.Topic$6.run(Topic.java:662)
> 	at org.apache.activemq.thread.SchedulerTimerTask.run(SchedulerTimerTask.java:33)
> 	at java.util.TimerThread.mainLoop(Unknown Source)
> 	at java.util.TimerThread.run(Unknown Source)
> {code}
> here is the server configuration:
> {code}
> <beans
>     xmlns="http://www.springframework.org/schema/beans"
>     xmlns:amq="http://activemq.apache.org/schema/core"
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
>     http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">
>   <!-- Allows us to use system properties as variables in this configuration file
-->
>   <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
>   
>   <!-- Configure the ActiveMQ broker -->
>   <broker
>       xmlns="http://activemq.apache.org/schema/core"
>       brokerName="ZyrionMessageBus" 
>       useJmx="false"
>       dataDirectory="${activemq.base}/../../utils/spool/jms"
>       deleteAllMessagesOnStartup="false"
>       advisorySupport="false"
>       offlineDurableSubscriberTimeout="7200000"
>       offlineDurableSubscriberTaskSchedule="1800000">
>     [...]
>     <!-- Configure message persistence for the broker -->
>     <persistenceAdapter>
>       <kahaDB directory="${activemq.base}/../../utils/spool/jms/kahadb" ignoreMissingJournalfiles="true"
checkForCorruptJournalFiles="true" checksumJournalFiles="true"/>
>     </persistenceAdapter>
> {code}
> i can provide a copy of the kahadb directory if necessary to duplicate the issue. let
me know if you require any additional information. thanks

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