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https://issues.apache.org/jira/browse/LUCENE-5958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144617#comment-14144617
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Michael McCandless commented on LUCENE-5958:
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I upgraded to blocker: we need to fix this before releasing 4.10.1.
> OOM or exceptions during checkpoint make IndexWriter have a bad day
> -------------------------------------------------------------------
>
> Key: LUCENE-5958
> URL: https://issues.apache.org/jira/browse/LUCENE-5958
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Priority: Blocker
> Fix For: 4.10.1, 5.0, Trunk
>
> Attachments: LUCENE-5958.patch, LUCENE-5958.patch
>
>
> During finishCommit(), we run checkpoint after we wrote the commit to disk,
> but if things go wrong here (e.g. IOError when IFD deletes a pending file,
> OOM), then everything will go wrong (we won't even properly incref things,
> and may end out deleting wrong files if the user calls rollback, leaving a
> corrupt index).
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