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https://issues.apache.org/jira/browse/OAK-3372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14744396#comment-14744396
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Vikas Saurabh commented on OAK-3372:
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[~mduerig], my last comment, it seems, was mis-informed. I was assuming that
other node store implementations also would have some sort of background read
(similar to one in DocumentNodeStore) for events for changes in other cluster
nodes. But, I couldn't quite follow Segment* implementation to figure out where
do external events get pulled in. Can you give some pointers?
> 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
> Labels: resilience
>
> 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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