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Date: Sun, 18 Sep 2011 12:30:12 +0000 (UTC)
From: "Giampaolo Tranchida (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
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Subject: [jira] [Commented] (AMQ-2284) ClassCastException in KahaDB
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    [ https://issues.apache.org/jira/browse/AMQ-2284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13107422#comment-13107422 ] 

Giampaolo Tranchida commented on AMQ-2284:
------------------------------------------

We see exactly the same error with 5.5.0-fuse-00-27 in high load condition, but only one time.
We suspect a problem with the SAN / filesystem that cause a filestore corruption.
After server restart all seems OK.
Do you have any test case to reproduce this error / bug ?

 
> ClassCastException in KahaDB
> ----------------------------
>
>                 Key: AMQ-2284
>                 URL: https://issues.apache.org/jira/browse/AMQ-2284
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.3.0
>         Environment: Linux, activemq-core and kahadb 5.3-SNAPSHOT from 2009-06-02
>            Reporter: Swen Moczarski
>             Fix For: 5.6.0
>
>
> We test the broker with the Kaha message store. After some time we get lots of class cast exceptions:
> {noformat}
> [2009-06-06 06:01:22,047] [QueueThread:queue://xxx] [ERROR] [org.apache.activemq.broker.region.cursors.AbstractStoreCursor] [Failed to fill batch]
> java.lang.ClassCastException: java.lang.Long cannot be cast to org.apache.activemq.store.kahadb.MessageDatabase$MessageKeys
>         at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$4.execute(KahaDBStore.java:228)
>         at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>         at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:221)
>         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:886)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:619)
> [2009-06-06 06:01:22,048] [QueueThread:queue://xxx] [ERROR] [org.apache.activemq.broker.region.cursors.AbstractStoreCursor] [Failed to fill batch]
> java.lang.RuntimeException: java.lang.ClassCastException: java.lang.Long cannot be cast to org.apache.activemq.store.kahadb.MessageDatabase$MessageKeys
>         at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:230)
>         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:886)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to org.apache.activemq.store.kahadb.MessageDatabase$MessageKeys
>         at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore$4.execute(KahaDBStore.java:228)
>         at org.apache.kahadb.page.Transaction.execute(Transaction.java:728)
>         at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.recoverNextMessages(KahaDBStore.java:221)
>         at org.apache.activemq.broker.region.cursors.QueueStorePrefetch.doFillBatch(QueueStorePrefetch.java:81)
>         at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.fillBatch(AbstractStoreCursor.java:227)
>         ... 10 more
> {noformat}
> For the messages we use the persistence delivery mode. 
> Our configuration (in Spring) for the persistance adapter:
> {code:xml} 
> <property name="persistenceAdapter">
>    <bean class="org.apache.activemq.store.kahadb.KahaDBStore">
>       <property name="directory" value="/message/store/dir" />
>    </bean>
> </property>
> {code} 

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