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https://issues.apache.org/jira/browse/OAK-3372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14988408#comment-14988408
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Vikas Saurabh commented on OAK-3372:
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[~mduerig], I'd update this issue with a test from oak bundles after this fix -
but that might take time. We had a test with the simplistic patch I mentioned
earlier (the version with no config and hence some removed code) and that did
work fine. I think it's fine to resolve this issue. I'd open a new one if
something still remains amiss.
> Collapsing external events in BackgroundObserver even before queue is full
> leads to JournalEntry not getting used
> -----------------------------------------------------------------------------------------------------------------
>
> Key: OAK-3372
> URL: https://issues.apache.org/jira/browse/OAK-3372
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.3.5
> Reporter: Vikas Saurabh
> Assignee: Michael Dürig
> Labels: resilience
> Attachments: OAK-3372.patch
>
>
> BackgroundObserver currently merges external events if the last one in queue
> is also an external event. This leads to diff being done for a revision pair
> which is different from the ones pushed actively into cache during backgroud
> read (using JournalEntry) i.e. diff queries for {{diff("/a/b", rA, rC)}}
> while background read had pushed results of {{diff("/a/b", rA, rB)}} and
> {{diff("/a/b", rB, rC)}}.
> (cc [~mreutegg], [~egli], [~chetanm], [~mduerig])
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