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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JCR-2747) ConcurrentModificationException in IndexMerger
Date Fri, 17 Sep 2010 20:50:32 GMT

     [ https://issues.apache.org/jira/browse/JCR-2747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jukka Zitting updated JCR-2747:
-------------------------------

    Fix Version/s: 2.0.3
                   2.1.2

Merged to the 2.1 branch in revision 998310 and the 2.0 branch in revision 998312.

> ConcurrentModificationException in IndexMerger
> ----------------------------------------------
>
>                 Key: JCR-2747
>                 URL: https://issues.apache.org/jira/browse/JCR-2747
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: indexing, jackrabbit-core
>    Affects Versions: 2.0.0, 2.1.0, 2.1.1
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>             Fix For: 2.0.3, 2.1.2, 2.2.0
>
>
> The IndexMerger.start() method can cause the following ConcurrentModificationException
to be thrown since it doesn't protect against concurrent access to the busyMergers list. The
workers started by the start() method will remove themselves from the busyMergers list, which
makes it possible for a quick worker to concurrently modify the list before the start() method
is finished iterating through it.
> java.util.ConcurrentModificationException
> 	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> 	at java.util.AbstractList$Itr.next(AbstractList.java:343)
> 	at org.apache.jackrabbit.core.query.lucene.IndexMerger.start(IndexMerger.java:122)
> 	at org.apache.jackrabbit.core.query.lucene.MultiIndex.<init>(MultiIndex.java:325)
> 	at org.apache.jackrabbit.core.query.lucene.SearchIndex.doInit(SearchIndex.java:507)
> 	at org.apache.jackrabbit.core.query.AbstractQueryHandler.init(AbstractQueryHandler.java:78)
> 	at org.apache.jackrabbit.core.config.RepositoryConfigurationParser$1.getQueryHandler(RepositoryConfigurationParser.java:630)
> 	at org.apache.jackrabbit.core.config.WorkspaceConfig.getQueryHandler(WorkspaceConfig.java:215)
> 	at org.apache.jackrabbit.core.config.WorkspaceConfig.getQueryHandler(WorkspaceConfig.java:215)
> 	at org.apache.jackrabbit.core.SearchManager.<init>(SearchManager.java:173)
> 	at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.getSearchManager(RepositoryImpl.java:1868)
> 	at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.doPostInitialize(RepositoryImpl.java:2077)
> 	at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.initialize(RepositoryImpl.java:1996)
> 	at org.apache.jackrabbit.core.RepositoryImpl.initStartupWorkspaces(RepositoryImpl.java:535)

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