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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2496) NPE if you open IW with CREATE on an index with no segments file
Date Thu, 10 Jun 2010 20:35:13 GMT
NPE if you open IW with CREATE on an index with no segments file
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                 Key: LUCENE-2496
                 URL: https://issues.apache.org/jira/browse/LUCENE-2496
             Project: Lucene - Java
          Issue Type: Bug
            Reporter: Michael McCandless
            Assignee: Michael McCandless
            Priority: Minor


I have a simple test case that hits this NPE:

{noformat}
    [junit] java.lang.NullPointerException
    [junit] 	at java.io.File.<init>(File.java:305)
    [junit] 	at org.apache.lucene.store.NIOFSDirectory.openInput(NIOFSDirectory.java:67)
    [junit] 	at org.apache.lucene.store.FSDirectory.openInput(FSDirectory.java:333)
    [junit] 	at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:213)
    [junit] 	at org.apache.lucene.index.IndexFileDeleter.<init>(IndexFileDeleter.java:218)
    [junit] 	at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1113)
    [junit] 	at org.apache.lucene.index.TestIndexWriter.testNoSegmentFile(TestIndexWriter.java:4975)
    [junit] 	at org.apache.lucene.util.LuceneTestCase.runBare(LuceneTestCase.java:277)
{noformat}

It happens if you have an aborted index, ie, there are segment files in there (*.frq, *.tis,
etc.) but no segments_N file, and then you try to open an IW with CREATE on that index.

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