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From "Martijn Hendriks (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-905) Clustering: race condition may cause duplicate entries in search index
Date Wed, 09 May 2007 09:43:15 GMT
Clustering: race condition may cause duplicate entries in search index
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                 Key: JCR-905
                 URL: https://issues.apache.org/jira/browse/JCR-905
             Project: Jackrabbit
          Issue Type: Bug
          Components: core
    Affects Versions: 1.3
            Reporter: Martijn Hendriks


There seems to be a race condition that may cause duplicate search index entries. It is reproducible
as follows (Jackrabbit 1.3):
1) Start clusternode 1 that just adds a single node of node type clustering:test.
2) Shutdown clusternode 1.
3) Start clusternode 2 with an empty search index.
4) Execute the query  //element(*, clustering:test).
4) Print the result of the query (UUIDs of nodes in the result set).

When I just run clusternode 2, then there is one node in the resultset, as expected. However,
when I debug clusternode 2 and have a breakpoint (i.e., a pause of a few seconds at line 306
of RepositoryImpl.java - just before the clusternode is started), then the resultset contains
two results, both with the same UUID.


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