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https://issues.apache.org/jira/browse/LUCENE-4738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13642088#comment-13642088
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Commit Tag Bot commented on LUCENE-4738:
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[branch_4x commit] mikemccand
http://svn.apache.org/viewvc?view=revision&revision=1475906
LUCENE-4738: only CheckIndex when the last commit is > segments_1
> Killed JVM when first commit was running will generate a corrupted index
> ------------------------------------------------------------------------
>
> Key: LUCENE-4738
> URL: https://issues.apache.org/jira/browse/LUCENE-4738
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.0
> Environment: OS: Linux 2.6.32-220.23.1.el6.x86_64
> Java: java version "1.7.0_05"
> Lucene: lucene-core-4.0.0
> Reporter: Billow Gao
> Assignee: Michael McCandless
> Fix For: 5.0, 4.3
>
> Attachments: LUCENE-4738.patch, LUCENE-4738.patch, LUCENE-4738.patch,
> LUCENE-4738_test.patch
>
>
> 1. Start a NEW IndexWriterBuilder on an empty folder,
> add some documents to the index
> 2. Call commit
> 3. When the segments_1 file with 0 byte was created, kill the JVM
> We will end with a corrupted index with an empty segments_1.
> We only have issue with the first commit crash.
> Also, if you tried to open an IndexSearcher on a new index. And the first
> commit on the index was not finished yet. Then you will see exception like:
> ===========================================================================
> org.apache.lucene.index.IndexNotFoundException: no segments* file found in
> org.apache.lucene.store.MMapDirectory@C:\tmp\testdir
> lockFactory=org.apache.lucene.store.NativeFSLockFactory@6ee00df: files:
> [write.lock, _0.fdt, _0.fdx]
> at
> org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:741)
> at
> org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:52)
> at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:65)
> ===========================================================================
> So when a new index was created, we should first create an empty index. We
> should not wait for the commit/close call to create the segment file.
> If we had an empty index there. It won't leave a corrupted index when there
> were a power issue on the first commit.
> And a concurrent IndexSearcher can access to the index(No match is better
> than exception).
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