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https://issues.apache.org/jira/browse/SOLR-12232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson reassigned SOLR-12232:
-------------------------------------
Assignee: Erick Erickson
> NativeFSLockFactory loses the channel when a thread is interrupted and the
> SolrCore becomes unusable after
> ----------------------------------------------------------------------------------------------------------
>
> Key: SOLR-12232
> URL: https://issues.apache.org/jira/browse/SOLR-12232
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 7.1.1
> Reporter: Jeff Miller
> Assignee: Erick Erickson
> Priority: Minor
> Labels: NativeFSLockFactory, locking
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> The condition is rare for us and seems basically a race. If a thread that is
> running just happens to have the FileChannel open for NativeFSLockFactory and
> is interrupted, the channel is closed since it extends
> [AbstractInterruptibleChannel|https://docs.oracle.com/javase/7/docs/api/java/nio/channels/spi/AbstractInterruptibleChannel.html]
> Unfortunately this means the Solr Core has to be unloaded and reopened to
> make the core usable again as the ensureValid check forever throws an
> exception after.
> org.apache.lucene.store.AlreadyClosedException: FileLock invalidated by an
> external force:
> NativeFSLock(path=data/index/write.lock,impl=sun.nio.ch.FileLockImpl[0:9223372036854775807
> exclusive invalid],creationTime=2018-04-06T21:45:11Z) at
> org.apache.lucene.store.NativeFSLockFactory$NativeFSLock.ensureValid(NativeFSLockFactory.java:178)
> at
> org.apache.lucene.store.LockValidatingDirectoryWrapper.createOutput(LockValidatingDirectoryWrapper.java:43)
> at
> org.apache.lucene.store.TrackingDirectoryWrapper.createOutput(TrackingDirectoryWrapper.java:43)
> at
> org.apache.lucene.codecs.compressing.CompressingStoredFieldsWriter.<init>(CompressingStoredFieldsWriter.java:113)
> at
> org.apache.lucene.codecs.compressing.CompressingStoredFieldsFormat.fieldsWriter(CompressingStoredFieldsFormat.java:128)
> at
> org.apache.lucene.codecs.lucene50.Lucene50StoredFieldsFormat.fieldsWriter(Lucene50StoredFieldsFormat.java:183)
>
> Proposed solution is using AsynchronousFileChannel instead, since this is
> only operating on a lock and .size method
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