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From: Dan <lue6x9@gmail.com>
Date: Sun, 6 Dec 2009 12:29:55 -0800
Message-ID: <75e0f60f0912061229n668b6a40vf2c1af1f938b729d@mail.gmail.com>
Subject: NIOFSDirectory AssertionError in sun.nio.ch.NativeThreadSet
To: java-user@lucene.apache.org
Content-Type: text/plain; charset=UTF-8

I've been running some tests with Lucene 2.9.1 on a Linux box with a
Sun JVM and getting a sun.nio.ch.NateiveThreadSet Assertion error (see
below for stacktrace).

Does anyone know what this error means? Any suggestions for a workaround?

We used the following to open the index.
	FSDirectory dir = FSDirectory.open(new File("path_to_lucene_index"));
        IndexReader sReader = IndexReader.open(dir, true);  // open a
read-only reader


java version "1.5.0_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_08-b03)
Java HotSpot(TM) Server VM (build 1.5.0_08-b03, mixed mode)


java.lang.AssertionError
        at sun.nio.ch.NativeThreadSet.add(NativeThreadSet.java:46)
        at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:623)
        at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:161)
        at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:136)
        at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:247)
        at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:157)
        at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:38)
        at org.apache.lucene.store.IndexInput.readVInt(IndexInput.java:80)
        at org.apache.lucene.index.TermBuffer.read(TermBuffer.java:64)
        at org.apache.lucene.index.SegmentTermEnum.next(SegmentTermEnum.java:129)
        at org.apache.lucene.index.SegmentTermEnum.scanTo(SegmentTermEnum.java:160)
        at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:232)
        at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:179)
        at org.apache.lucene.index.SegmentReader.docFreq(SegmentReader.java:975)
        at org.apache.lucene.index.DirectoryReader.docFreq(DirectoryReader.java:627)
        at org.apache.lucene.search.IndexSearcher.docFreq(IndexSearcher.java:147)
        at org.apache.lucene.search.Similarity.idfExplain(Similarity.java:765)
        at org.apache.lucene.search.TermQuery$TermWeight.&lt;init&gt;(TermQuery.java:46)
        at org.apache.lucene.search.TermQuery.createWeight(TermQuery.java:146)
        at org.apache.lucene.search.BooleanQuery$BooleanWeight.&lt;init&gt;(BooleanQuery.java:184)
        at org.apache.lucene.search.BooleanQuery.createWeight(BooleanQuery.java:415)
        at org.apache.lucene.search.Query.weight(Query.java:99)
        at org.apache.lucene.search.Searcher.createWeight(Searcher.java:230)
        at org.apache.lucene.search.Searcher.search(Searcher.java:171)

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