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Posted to dev@activemq.apache.org by "Gary Tully (JIRA)" <ji...@apache.org> on 2013/09/19 22:55:53 UTC

[jira] [Commented] (AMQ-4729) mKahaDB master slave needs lock when filtered adapter locks are created on the fly

    [ https://issues.apache.org/jira/browse/AMQ-4729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13772304#comment-13772304 ] 

Gary Tully commented on AMQ-4729:
---------------------------------

a workaround is described at: https://issues.apache.org/jira/browse/AMQ-4365?focusedCommentId=13758262&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13758262
                
> mKahaDB master slave needs lock when filtered adapter locks are created on the fly
> ----------------------------------------------------------------------------------
>
>                 Key: AMQ-4729
>                 URL: https://issues.apache.org/jira/browse/AMQ-4729
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.8.0
>            Reporter: Gary Tully
>            Assignee: Gary Tully
>             Fix For: 5.9.0
>
>
> {code}<mKahaDB directory="../kahadb">
>    <filteredPersistenceAdapters>
>       <!-- kahaDB per destinations -->
>       <filteredKahaDB perDestination="true" >
>         <persistenceAdapter>
>           <kahaDB journalMaxFileLength="32mb" />
>         </persistenceAdapter>
>       </filteredKahaDB>
>     </filteredPersistenceAdapters>{code}
> problem:
> 1. Starting the slave with an "empty" database, i.e no queues results in the slave trying to start and ultimately failing as the address is in use. There's now lock. Pushing a message to TEST.FOO and then starting the database works OK. The slave comes up and locks and waits.
> 2. Now, adding a TEST.FOO1 to the master. The master now has the two queues, TEST.FOO and TEST.FOO1. Kill the master and let the slave take over. The slave only sees TEST.FOO. Not TEST.FOO1.

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