[jira] [Created] (OAK-3372) Collapsing external events in BackgroundObserver even before queue is full leads to JournalEntry not getting used

["Vikas Saurabh (JIRA)" <ji...@apache.org>]

Vikas Saurabh created OAK-3372:
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             Summary: 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


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])



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