Jeff Miller created SOLR-12232:
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Summary: 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
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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