[jira] [Commented] (AMQ-5875) Removing a destination when using mKahaDB can cause an IllegalStateException

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMQ-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15150542#comment-15150542 ] 

ASF subversion and git services commented on AMQ-5875:
------------------------------------------------------

Commit fd760888147b1db69a330c32a3630ddd87c2a53c in activemq's branch refs/heads/master from [~gtully]
[ https://git-wip-us.apache.org/repos/asf?p=activemq.git;h=fd76088 ]

https://issues.apache.org/jira/browse/AMQ-5875 - additional test that shows durable sub registration does not error out with this fix


> Removing a destination when using mKahaDB can cause an IllegalStateException
> ----------------------------------------------------------------------------
>
>                 Key: AMQ-5875
>                 URL: https://issues.apache.org/jira/browse/AMQ-5875
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.11.1
>            Reporter: Christopher L. Shannon
>            Assignee: Gary Tully
>             Fix For: 5.12.0
>
>         Attachments: MultiKahaDBDeletionTest.java
>
>
> This issue occurs when using multiKahaDB and a wild card destination.  The problem is that with a wild card topic, multiple destinations can be attached to the same store.  If one of the destinations is deleted and the other destinations are empty, the entire store is deleted.  This causes an exception later on if trying to do something like subscribe to a destination that wasn't deleted.  I've attached a test case to show this issue.  
> The problem seems to be that the removeMessageStore method in MultiKahaDBPersistenceAdapter relies on adapter.getDestinations.isEmpty() to determine whether the store is eligible for deleting.  Unfortunately, the getDestinations method in KahaDBStore excludes destinations that are empty therefore the method doesn't return any destinations even though there is one still attached to the store so the logic goes ahead and deletes the store.
> The stack trace from running against 5.12.0-SNAPSHOT is below:
> {noformat}
> java.lang.IllegalStateException: PageFile is not loaded
>         at org.apache.activemq.store.kahadb.disk.page.PageFile.assertLoaded(PageFile.java:811)
>         at org.apache.activemq.store.kahadb.disk.page.PageFile.tx(PageFile.java:304)
>         at org.apache.activemq.store.kahadb.KahaDBStore$KahaDBTopicMessageStore.getMessageCount(KahaDBStore.java:866)
>         at org.apache.activemq.store.ProxyTopicMessageStore.getMessageCount(ProxyTopicMessageStore.java:140)
>         at org.apache.activemq.store.ProxyTopicMessageStore.getMessageCount(ProxyTopicMessageStore.java:140)
>         at org.apache.activemq.broker.region.cursors.TopicStorePrefetch.getStoreSize(TopicStorePrefetch.java:97)
>         at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.resetSize(AbstractStoreCursor.java:73)
>         at org.apache.activemq.broker.region.cursors.TopicStorePrefetch.<init>(TopicStorePrefetch.java:58)
>         at org.apache.activemq.broker.region.cursors.StoreDurableSubscriberCursor.add(StoreDurableSubscriberCursor.java:119)
>         at org.apache.activemq.broker.region.PrefetchSubscription.add(PrefetchSubscription.java:584)
>         at org.apache.activemq.broker.region.DurableTopicSubscription.add(DurableTopicSubscription.java:113)
>         at org.apache.activemq.broker.region.Topic.addSubscription(Topic.java:161)
>         at org.apache.activemq.broker.region.AbstractRegion.addConsumer(AbstractRegion.java:400)
>         at org.apache.activemq.broker.region.TopicRegion.addConsumer(TopicRegion.java:168)
>         at org.apache.activemq.broker.region.RegionBroker.addConsumer(RegionBroker.java:427)
>         at org.apache.activemq.broker.jmx.ManagedRegionBroker.addConsumer(ManagedRegionBroker.java:244)
>         at org.apache.activemq.broker.BrokerFilter.addConsumer(BrokerFilter.java:102)
>         at org.apache.activemq.advisory.AdvisoryBroker.addConsumer(AdvisoryBroker.java:107)
>         at org.apache.activemq.broker.BrokerFilter.addConsumer(BrokerFilter.java:102)
>         at org.apache.activemq.broker.BrokerFilter.addConsumer(BrokerFilter.java:102)
>         at org.apache.activemq.broker.MutableBrokerFilter.addConsumer(MutableBrokerFilter.java:107)
>         at org.apache.activemq.broker.TransportConnection.processAddConsumer(TransportConnection.java:667)
>         at org.apache.activemq.command.ConsumerInfo.visit(ConsumerInfo.java:348)
>         at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:334)
>         at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:188)
>         at org.apache.activemq.transport.MutexTransport.onCommand(MutexTransport.java:50)
>         at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113)
>         at org.apache.activemq.transport.AbstractInactivityMonitor.onCommand(AbstractInactivityMonitor.java:300)
>         at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
>         at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:214)
>         at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:196)
>         at java.lang.Thread.run(Thread.java:745)
> {noformat}



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