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https://issues.apache.org/jira/browse/OAK-11895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Reschke closed OAK-11895.
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> CheckpointCompactor writes to "after" instead of "onto" NodeState
> -----------------------------------------------------------------
>
> Key: OAK-11895
> URL: https://issues.apache.org/jira/browse/OAK-11895
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: segment-tar
> Affects Versions: 1.84.0
> Reporter: Julian Sedding
> Assignee: Julian Sedding
> Priority: Major
> Fix For: 1.88.0
>
>
> The method {{CheckpointCompactor#compact(NodeState before, NodeState after,
> NodeState onto, Canceller canceller)}} writes the compacted changes to the
> "after" NodeState instead of the "onto" NodeState.
> Likely, this went unnoticed until now, because AFAICS all used invocations
> within Oak pass the same NodeState for the "after" and "onto" NodeStates.
> I am trying to create a compacted copy of a segmentstore. In this scenario
> the "after" NodeState is backed by a {{ReadOnlyFileStore}}, because it is
> compacting the segmentstore of a running system. When testing this scenario,
> I got an exception, because the write to the "after" NodeState were denied.
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