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[jira] Resolved: (LUCENE-2386) IndexWriter commits unnecessarily on fres

Subject: [jira] Resolved: (LUCENE-2386) IndexWriter commits unnecessarily on fresh Directory
From: "Shai Erera (JIRA)"
Date: Sun, 11 Apr 2010 07:28:42 -0400 EDT
     [ 
https://issues.apache.org/jira/browse/LUCENE-2386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Shai Erera resolved LUCENE-2386.
--------------------------------

    Lucene Fields: [New, Patch Available]  (was: [New])
       Resolution: Fixed

Committed revision 932868.

> 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
>
>         Attachments: 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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