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From "Earwin Burrfoot (JIRA)" <>
Subject [jira] Commented: (LUCENE-2811) SegmentInfo should explicitly track whether that segment wrote term vectors
Date Tue, 14 Dec 2010 16:43:01 GMT


Earwin Burrfoot commented on LUCENE-2811:

I think SegmentInfo.hasVectors should be a boolean.

If this is an old index, we can check the file presence in SegmentInfo constructor, set it
properly, and on next write index is silently upgraded.

> SegmentInfo should explicitly track whether that segment wrote term vectors
> ---------------------------------------------------------------------------
>                 Key: LUCENE-2811
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 3.1, 4.0
>         Attachments: LUCENE-2811.patch
> Today SegmentInfo doesn't know if it has vectors, which means its files() method must
check if the files exist.
> This leads to subtle bugs, because Si.files() caches the files but then we fail to invalidate
that later when the term vectors files are created.
> It also leads to sloppy code, eg TermVectorsReader "gracefully" handles being opened
when the files do not exist.  I don't like that; it should only be opened if they exist.
> This also fixes these intermittent failures we've been seeing:
> {noformat}
> junit.framework.AssertionFailedError: IndexFileDeleter doesn't know about file _1e.tvx
>        at org.apache.lucene.util.LuceneTestCase$LuceneTestCaseRunner.runChild(
>        at org.apache.lucene.util.LuceneTestCase$LuceneTestCaseRunner.runChild(
>        at org.apache.lucene.index.IndexWriter.filesExist(
>        at org.apache.lucene.index.IndexWriter.startCommit(
>        at org.apache.lucene.index.IndexWriter.prepareCommit(
>        at org.apache.lucene.index.IndexWriter.commitInternal(
>        at org.apache.lucene.index.IndexWriter.commit(
>        at org.apache.lucene.index.IndexWriter.commit(
>        at org.apache.lucene.index.TestIndexWriterExceptions.testRandomExceptionsThreads(
> {noformat}

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