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https://issues.apache.org/jira/browse/OAK-2811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Parvulescu resolved OAK-2811.
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Resolution: Fixed
Assignee: Alex Parvulescu
merged to 1.2 with http://svn.apache.org/r1676560
> Oak + data store: NPE in SegmentNodeStoreService.deactivate() leads to data
> store not shutting down properly
> ------------------------------------------------------------------------------------------------------------
>
> Key: OAK-2811
> URL: https://issues.apache.org/jira/browse/OAK-2811
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: segmentmk
> Affects Versions: 1.2
> Reporter: Alexander Klimetschek
> Assignee: Alex Parvulescu
> Fix For: 1.3.0, 1.2.2
>
>
> For some reason, on shutdown of a system, the {{observerTracker}} in the
> SegmentNodeStoreService became null before deactivate() was called, leading
> to this NPE on [line
> 404|https://github.com/apache/jackrabbit-oak/blob/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/SegmentNodeStoreService.java#L404]:
> {noformat}
> 24.04.2015 13:20:55.960 *ERROR* [FelixStartLevel]
> org.apache.jackrabbit.oak-core
> [org.apache.jackrabbit.oak.plugins.segment.SegmentNodeStoreService(87)] The
> deactivate method has thrown an exception (java.lang.NullPointerException)
> java.lang.NullPointerException: null
> at
> org.apache.jackrabbit.oak.plugins.segment.SegmentNodeStoreService.deactivate(SegmentNodeStoreService.java:404)
> ... just reflection and apache felix code on shutdown
> {noformat}
> This in turn lead to the datastore not being closed ([4 lines
> later|https://github.com/apache/jackrabbit-oak/blob/1.2/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/SegmentNodeStoreService.java#L408]).
> In our case we used the CachingDataStore, which relies on close() being
> called, if not it triggers JCR-3873, which prevents the system from starting
> up again.
> In any case, the NPE should be guarded.
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