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https://issues.apache.org/jira/browse/LUCENE-3872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-3872:
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Attachment: LUCENE-3872.patch
Patch w/ failing test showing how we silently lose indexed docs...
> Index changes are lost if you call prepareCommit() then close()
> ---------------------------------------------------------------
>
> Key: LUCENE-3872
> URL: https://issues.apache.org/jira/browse/LUCENE-3872
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 3.6, 4.0
>
> Attachments: LUCENE-3872.patch
>
>
> You are supposed to call commit() after calling prepareCommit(), but... if
> you forget, and call close() after prepareCommit() without calling commit(),
> then any changes done after the prepareCommit() are silently lost (including
> adding/deleting docs, but also any completed merges).
> Spinoff from java-user thread "lots of .cfs (compound files) in the index
> directory" from Tim Bogaert.
> I think to fix this, IW.close should throw an IllegalStateException if
> prepareCommit() was called with no matching call to commit().
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