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From "Alex Parvulescu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-2192) Concurrent commit during compaction results in mixed segments
Date Wed, 05 Nov 2014 19:20:34 GMT

    [ https://issues.apache.org/jira/browse/OAK-2192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14198906#comment-14198906
] 

Alex Parvulescu commented on OAK-2192:
--------------------------------------

I've potentially noticed a new issue OAK-2256 following the root refresh issues.

> Concurrent commit during compaction results in mixed segments
> -------------------------------------------------------------
>
>                 Key: OAK-2192
>                 URL: https://issues.apache.org/jira/browse/OAK-2192
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: compaction, gc
>         Attachments: OAK-2192-2.patch, OAK-2192-poc-fix.patch, OAK-2192-possible-test.patch,
OAK-2192-v2.patch, OAK-2192-v3.patch, OAK-2192-v4.patch, OAK-2192-v5.patch, OAK-2192-v6.patch,
OAK-2192-v7.patch, OAK-2192.patch
>
>
> Changes that are committed during a segment store compaction run will be compacted on
top of the already compacted changes. However the compactor uses the wrong before state in
this case. Instead of compacting against the compacted before state it uses the un-compacted
before state. The resulting state will thus contain references to un-compacted state, making
those not eligible for later clean up. 



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