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https://issues.apache.org/jira/browse/OAK-4321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15268181#comment-15268181
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Marcel Reutegger commented on OAK-4321:
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You can probably get the system into this state when you modify data directly
on the DocumentStore API level. E.g. shoot a hole into the hierarchy by
removing a document with children than still exist.
> Improve conflict exception message to show if conflict is unexpected
> --------------------------------------------------------------------
>
> Key: OAK-4321
> URL: https://issues.apache.org/jira/browse/OAK-4321
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, documentmk
> Reporter: Vikas Saurabh
> Assignee: Vikas Saurabh
> Priority: Minor
> Labels: candidate_oak_1_0, candidate_oak_1_2, candidate_oak_1_4
> Fix For: 1.6
>
> Attachments: OAK-4321-1.0.diff
>
>
> Merge exception (aka OakMergeXXXX) are often expected when concurrent
> sessions do conflicting writes. But in some occasions, we've seen bugs in oak
> which also lead to merge exception.
> This creates confusion during investigation to isolate if it's an issue in
> oak or a genuine concurrent conflict.
> It'd be useful if the exception message has information to distinguish that.
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