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https://issues.apache.org/jira/browse/OAK-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13944558#comment-13944558
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Michael Dürig commented on OAK-1553:
------------------------------------
At http://svn.apache.org/r1580588 I committed the relaxed contract for the
addExistingNode conflict of {{MicroKernel.rebase}}, which allows for more
sophisticated merging behaviour.
> More sophisticated conflict resolution when concurrently adding nodes
> ---------------------------------------------------------------------
>
> Key: OAK-1553
> URL: https://issues.apache.org/jira/browse/OAK-1553
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, mk, mongomk, segmentmk
> Reporter: Michael Dürig
> Assignee: Michael Dürig
> Fix For: 0.20
>
> Attachments: OAK-1553.patch
>
>
> {{MicroKernel.rebase}} currently specifies: "addExistingNode: A node has been
> added that is different from a node of them same name that has been added to
> the trunk."
> This is somewhat troublesome in the case where the same node with different
> but non conflicting child items is added concurrently:
> {code}
> f.add("fo").add("u1"); commit();
> f.add("fo").add("u2"); commit();
> {code}
> currently fails with a conflict because {{fo}} is not the same node for the
> both cases. See discussion http://markmail.org/message/flst4eiqvbp4gi3z
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