FAQ
I'm getting a ClosedChannelException from IndexWriter.getReader(). I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation. Does anyone have an idea what might be wrong? The disk is not full and the permissions look correct.

Here the stack trace from revision 926791:

java.nio.channels.ClosedChannelException
at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
at org.apache.lucene.index.FieldsReader.(SegmentReader.java:294)
at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
at org.apache.lucene.index.DirectoryReader.(ReadOnlyDirectoryReader.java:36)
at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

Thanks,
Justin





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  • Michael McCandless at Apr 8, 2010 at 7:41 pm
    Are you using Future.cancel or directly using Thread.interrupt? If so
    it could be this nasty issue:

    https://issues.apache.org/jira/browse/LUCENE-2239

    Try temporarily using a Directory impl other than NIOFSDirectory and
    see if the problem still happens?

    Mike
    On Thu, Apr 8, 2010 at 2:14 PM, Justin wrote:
    I'm getting a ClosedChannelException from IndexWriter.getReader().  I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation.  Does anyone have an idea what might be wrong?  The disk is not full and the permissions look correct.

    Here the stack trace from revision 926791:

    java.nio.channels.ClosedChannelException
    at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
    at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
    at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
    at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
    at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
    at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
    at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
    at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
    at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:114)
    at org.apache.lucene.index.SegmentReader$CoreReaders.openDocStores(SegmentReader.java:294)
    at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
    at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
    at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
    at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:138)
    at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:36)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

    Thanks,
    Justin





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  • Justin at Apr 8, 2010 at 8:39 pm
    In fact, we are using Thread.interrupt() to warm up a searcher in a separate thread (not really that uncommon, is it?). We may switch to Object::wait(long) and Object::notify() instead of switching the Directory implementation. Thanks for recognizing the issue!




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 2:41:07 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    Are you using Future.cancel or directly using Thread.interrupt? If so
    it could be this nasty issue:

    https://issues.apache.org/jira/browse/LUCENE-2239

    Try temporarily using a Directory impl other than NIOFSDirectory and
    see if the problem still happens?

    Mike
    On Thu, Apr 8, 2010 at 2:14 PM, Justin wrote:
    I'm getting a ClosedChannelException from IndexWriter.getReader(). I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation. Does anyone have an idea what might be wrong? The disk is not full and the permissions look correct.

    Here the stack trace from revision 926791:

    java.nio.channels.ClosedChannelException
    at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
    at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
    at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
    at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
    at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
    at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
    at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
    at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
    at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:114)
    at org.apache.lucene.index.SegmentReader$CoreReaders.openDocStores(SegmentReader.java:294)
    at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
    at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
    at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
    at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:138)
    at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:36)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

    Thanks,
    Justin





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  • Michael McCandless at Apr 8, 2010 at 8:51 pm
    OK, phew :)

    Yea warming in a separate thread is common... but why does
    Thread.interrupt() come into play in your app for warming?

    Mike
    On Thu, Apr 8, 2010 at 4:38 PM, Justin wrote:
    In fact, we are using Thread.interrupt() to warm up a searcher in a separate thread (not really that uncommon, is it?).  We may switch to Object::wait(long) and Object::notify() instead of switching the Directory implementation.  Thanks for recognizing the issue!




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 2:41:07 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    Are you using Future.cancel or directly using Thread.interrupt?  If so
    it could be this nasty issue:

    https://issues.apache.org/jira/browse/LUCENE-2239

    Try temporarily using a Directory impl other than NIOFSDirectory and
    see if the problem still happens?

    Mike
    On Thu, Apr 8, 2010 at 2:14 PM, Justin wrote:
    I'm getting a ClosedChannelException from IndexWriter.getReader().  I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation.  Does anyone have an idea what might be wrong?  The disk is not full and the permissions look correct.

    Here the stack trace from revision 926791:

    java.nio.channels.ClosedChannelException
    at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
    at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
    at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
    at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
    at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
    at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
    at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
    at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
    at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:114)
    at org.apache.lucene.index.SegmentReader$CoreReaders.openDocStores(SegmentReader.java:294)
    at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
    at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
    at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
    at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:138)
    at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:36)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

    Thanks,
    Justin





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  • Justin at Apr 8, 2010 at 9:20 pm
    We have a custom IndexSearcher that fetches a near real-time reader and calls FieldCache.DEFAULT.getStrings() after a calculated length of time or when certain changes are made to the index (requiring immediate searchability). The thread slept for that length of time unless an interrupt was given. wait/notify should accomplish the same without interrupting NIOFSDirectory.




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 3:50:41 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    OK, phew :)

    Yea warming in a separate thread is common... but why does
    Thread.interrupt() come into play in your app for warming?

    Mike
    On Thu, Apr 8, 2010 at 4:38 PM, Justin wrote:
    In fact, we are using Thread.interrupt() to warm up a searcher in a separate thread (not really that uncommon, is it?). We may switch to Object::wait(long) and Object::notify() instead of switching the Directory implementation. Thanks for recognizing the issue!




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 2:41:07 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    Are you using Future.cancel or directly using Thread.interrupt? If so
    it could be this nasty issue:

    https://issues.apache.org/jira/browse/LUCENE-2239

    Try temporarily using a Directory impl other than NIOFSDirectory and
    see if the problem still happens?

    Mike
    On Thu, Apr 8, 2010 at 2:14 PM, Justin wrote:
    I'm getting a ClosedChannelException from IndexWriter.getReader(). I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation. Does anyone have an idea what might be wrong? The disk is not full and the permissions look correct.

    Here the stack trace from revision 926791:

    java.nio.channels.ClosedChannelException
    at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
    at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
    at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
    at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
    at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
    at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
    at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
    at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
    at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:114)
    at org.apache.lucene.index.SegmentReader$CoreReaders.openDocStores(SegmentReader.java:294)
    at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
    at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
    at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
    at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:138)
    at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:36)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

    Thanks,
    Justin





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  • Simon Willnauer at Apr 8, 2010 at 9:53 pm
    Argh! one more running into this issue.

    It still bugs me that NIOFSDirectory struggles so badly if interrupt is used.

    simon
    On Thu, Apr 8, 2010 at 11:19 PM, Justin wrote:
    We have a custom IndexSearcher that fetches a near real-time reader and calls FieldCache.DEFAULT.getStrings() after a calculated length of time or when certain changes are made to the index (requiring immediate searchability).  The thread slept for that length of time unless an interrupt was given.  wait/notify should accomplish the same without interrupting NIOFSDirectory.




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 3:50:41 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    OK, phew :)

    Yea warming in a separate thread is common... but why does
    Thread.interrupt() come into play in your app for warming?

    Mike
    On Thu, Apr 8, 2010 at 4:38 PM, Justin wrote:
    In fact, we are using Thread.interrupt() to warm up a searcher in a separate thread (not really that uncommon, is it?).  We may switch to Object::wait(long) and Object::notify() instead of switching the Directory implementation.  Thanks for recognizing the issue!




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 2:41:07 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    Are you using Future.cancel or directly using Thread.interrupt?  If so
    it could be this nasty issue:

    https://issues.apache.org/jira/browse/LUCENE-2239

    Try temporarily using a Directory impl other than NIOFSDirectory and
    see if the problem still happens?

    Mike
    On Thu, Apr 8, 2010 at 2:14 PM, Justin wrote:
    I'm getting a ClosedChannelException from IndexWriter.getReader().  I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation.  Does anyone have an idea what might be wrong?  The disk is not full and the permissions look correct.

    Here the stack trace from revision 926791:

    java.nio.channels.ClosedChannelException
    at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
    at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
    at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
    at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
    at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
    at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
    at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
    at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
    at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:114)
    at org.apache.lucene.index.SegmentReader$CoreReaders.openDocStores(SegmentReader.java:294)
    at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
    at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
    at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
    at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:138)
    at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:36)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

    Thanks,
    Justin





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  • Justin at Apr 8, 2010 at 10:19 pm
    From an architecture standpoint, wait/notify does require extra logic to catch any notify calls while a searcher is being replaced. Using interrupt() was quite convenient at insuring the searcher was up-to-date.



    ----- Original Message ----
    From: Simon Willnauer <simon.willnauer@googlemail.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 4:53:08 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    Argh! one more running into this issue.

    It still bugs me that NIOFSDirectory struggles so badly if interrupt is used.

    simon
    On Thu, Apr 8, 2010 at 11:19 PM, Justin wrote:
    We have a custom IndexSearcher that fetches a near real-time reader and calls FieldCache.DEFAULT.getStrings() after a calculated length of time or when certain changes are made to the index (requiring immediate searchability). The thread slept for that length of time unless an interrupt was given. wait/notify should accomplish the same without interrupting NIOFSDirectory.




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 3:50:41 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    OK, phew :)

    Yea warming in a separate thread is common... but why does
    Thread.interrupt() come into play in your app for warming?

    Mike
    On Thu, Apr 8, 2010 at 4:38 PM, Justin wrote:
    In fact, we are using Thread.interrupt() to warm up a searcher in a separate thread (not really that uncommon, is it?). We may switch to Object::wait(long) and Object::notify() instead of switching the Directory implementation. Thanks for recognizing the issue!




    ----- Original Message ----
    From: Michael McCandless <lucene@mikemccandless.com>
    To: java-user@lucene.apache.org
    Sent: Thu, April 8, 2010 2:41:07 PM
    Subject: Re: ClosedChannelException from IndexWriter.getReader()

    Are you using Future.cancel or directly using Thread.interrupt? If so
    it could be this nasty issue:

    https://issues.apache.org/jira/browse/LUCENE-2239

    Try temporarily using a Directory impl other than NIOFSDirectory and
    see if the problem still happens?

    Mike
    On Thu, Apr 8, 2010 at 2:14 PM, Justin wrote:
    I'm getting a ClosedChannelException from IndexWriter.getReader(). I don't think the writer has been closed and, if it were, I would expect an AlreadyClosedException as described in the API documentation. Does anyone have an idea what might be wrong? The disk is not full and the permissions look correct.

    Here the stack trace from revision 926791:

    java.nio.channels.ClosedChannelException
    at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:88)
    at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:613)
    at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:150)
    at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:139)
    at org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:257)
    at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:160)
    at org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:39)
    at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:74)
    at org.apache.lucene.index.FieldsReader.<init>(FieldsReader.java:114)
    at org.apache.lucene.index.SegmentReader$CoreReaders.openDocStores(SegmentReader.java:294)
    at org.apache.lucene.index.SegmentReader.openDocStores(SegmentReader.java:590)
    at org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:640)
    at org.apache.lucene.index.IndexWriter$ReaderPool.getReadOnlyClone(IndexWriter.java:591)
    at org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:138)
    at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:36)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:423)
    at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:387)

    Thanks,
    Justin





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