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From "Martijn Hendriks (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-1078) ChangeLog serialization causes cache inconsistencies
Date Thu, 23 Aug 2007 08:00:41 GMT
ChangeLog serialization causes cache inconsistencies
----------------------------------------------------

                 Key: JCR-1078
                 URL: https://issues.apache.org/jira/browse/JCR-1078
             Project: Jackrabbit
          Issue Type: Bug
          Components: clustering
    Affects Versions: 1.3
         Environment: Clustered Jackrabbit 1.3
            Reporter: Martijn Hendriks


The ordering of actions is taken into account when a ChangeLog is built through session manipulations
(see, for instance,  ChangeLog.deleted(ItemState state)). When it is serialized in ClusterNode.write(Record
record, ChangeLog changeLog, EventStateCollection esc), however, this implicit ordering might
be changed. As a consequence,  the deserialization in ClusterNode.consume(Record record) might
produce a different ChangeLog with the effect that the local caches get out-of-sync with the
persistent state of the repository.

The issue should be reproducable as follows:
- Setup a clustered environment with two Jackrabbit instances, say A and B.
- On instance A add a property "P" with value "x" to some node and save the session.
- On instance B read property "P" -> it will have value "x".
- On instance A delete property P and then add it again with value "y" and save the session.
- On instance B read property "P" -> it will still have value "x" after the cluster sync...

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