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https://issues.apache.org/jira/browse/LUCENE-5958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14137028#comment-14137028
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Robert Muir commented on LUCENE-5958:
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The thing is, the commit has already gone down, we cant throw any exception to
the user here, because there is "no going back".
The only good solution i have, is similar to 'hitOOM' (maybe we can generalize
that?) to hold exceptions like this, and deliver them in the future instead. In
such a case (hitOOM=true or whatever we rename it to), we should definitely
never delete any files for any reason. Leave it to the next writer.
> 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
>
> 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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