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From "Alex Parvulescu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-2192) Concurrent commit during compaction results in mixed segments
Date Tue, 04 Nov 2014 11:08:34 GMT

     [ https://issues.apache.org/jira/browse/OAK-2192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alex Parvulescu updated OAK-2192:
---------------------------------
    Attachment: OAK-2192-v4.patch

v4 , I've merge all compaction related settings into a single class. this will make it easier
to expose via JMX so we can live tweak & test the different options. the jmx stuff is
not yet included.

> 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.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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