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https://issues.apache.org/jira/browse/LUCENE-2386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-2386:
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Fix Version/s: 3.1
> IndexWriter commits unnecessarily on fresh Directory
> ----------------------------------------------------
>
> Key: LUCENE-2386
> URL: https://issues.apache.org/jira/browse/LUCENE-2386
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Reporter: Shai Erera
> Assignee: Shai Erera
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2386.patch, LUCENE-2386.patch, LUCENE-2386.patch,
> LUCENE-2386.patch, LUCENE-2386.patch, LUCENE-2386.patch
>
>
> I've noticed IndexWriter's ctor commits a first commit (empty one) if a fresh
> Directory is passed, w/ OpenMode.CREATE or CREATE_OR_APPEND. This seems
> unnecessarily, and kind of brings back an autoCommit mode, in a strange way
> ... why do we need that commit? Do we really expect people to open an
> IndexReader on an empty Directory which they just passed to an IW w/
> create=true? If they want, they can simply call commit() right away on the IW
> they created.
> I ran into this when writing a test which committed N times, then compared
> the number of commits (via IndexReader.listCommits) and was surprised to see
> N+1 commits.
> Tried to change doCommit to false in IW ctor, but it got IndexFileDeleter
> jumping on me .. so the change might not be that simple. But I think it's
> manageable, so I'll try to attack it (and IFD specifically !) back :).
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