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https://issues.apache.org/jira/browse/OAK-8623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16929161#comment-16929161
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Marcel Reutegger commented on OAK-8623:
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Added ignored tests that verify the new expected behaviour:
http://svn.apache.org/r1866900
> Improve collision handling performance
> --------------------------------------
>
> Key: OAK-8623
> URL: https://issues.apache.org/jira/browse/OAK-8623
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: documentmk
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Priority: Major
>
> The current collision handling on conflict in the DocumentNodeStore can be
> rather expensive when there are old branch commits which were not merged.
> A commit that includes documents with old branch commits that have not been
> merged will always attempt to set a collision marker on the commit root
> document for those changes.
> While it is difficult to tell whether a branch commit will be merged at some
> point, at least those branch commits that were created before the most recent
> startup of a cluster node cannot be merged. The collision handling logic
> could be improved to take the start time of a cluster node into account.
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