Simon Willnauer created LUCENE-6214:
---------------------------------------
Summary: IW deadlocks if commit and reopen happens concurrently
while exception is hit
Key: LUCENE-6214
URL: https://issues.apache.org/jira/browse/LUCENE-6214
Project: Lucene - Core
Issue Type: Bug
Affects Versions: 5.0
Reporter: Simon Willnauer
I just hit this while working on an elasticseach test using a lucene 5.1
snapshot (5.1.0-snapshot-1654549). The test throws random exceptions via
MockDirWrapper and deadlocks, jstack says:
{noformat}
Found one Java-level deadlock:
=============================
"elasticsearch[node_2][refresh][T#2]":
waiting to lock monitor 0x00007fe51314c098 (object 0x00000007018ee8d8, a
java.lang.Object),
which is held by "elasticsearch[node_2][generic][T#1]"
"elasticsearch[node_2][generic][T#1]":
waiting to lock monitor 0x00007fe512d74b68 (object 0x00000007018ee8e8, a
java.lang.Object),
which is held by "elasticsearch[node_2][refresh][T#2]"
Java stack information for the threads listed above:
===================================================
"elasticsearch[node_2][refresh][T#2]":
at
org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:4441)
- waiting to lock <0x00000007018ee8d8> (a java.lang.Object)
at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:436)
- locked <0x00000007018ee8e8> (a java.lang.Object)
at
org.apache.lucene.index.StandardDirectoryReader.doOpenFromWriter(StandardDirectoryReader.java:281)
at
org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:256)
at
org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:246)
at
org.apache.lucene.index.FilterDirectoryReader.doOpenIfChanged(FilterDirectoryReader.java:104)
at
org.apache.lucene.index.DirectoryReader.openIfChanged(DirectoryReader.java:123)
at
org.apache.lucene.search.SearcherManager.refreshIfNeeded(SearcherManager.java:137)
at
org.apache.lucene.search.SearcherManager.refreshIfNeeded(SearcherManager.java:58)
at
org.apache.lucene.search.ReferenceManager.doMaybeRefresh(ReferenceManager.java:176)
at
org.apache.lucene.search.ReferenceManager.maybeRefreshBlocking(ReferenceManager.java:253)
at
org.elasticsearch.index.engine.internal.InternalEngine.refresh(InternalEngine.java:703)
at org.elasticsearch.index.shard.IndexShard.refresh(IndexShard.java:500)
at
org.elasticsearch.index.shard.IndexShard$EngineRefresher$1.run(IndexShard.java:954)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
"elasticsearch[node_2][generic][T#1]":
at
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2730)
- waiting to lock <0x00000007018ee8e8> (a java.lang.Object)
- locked <0x00000007018ee8d8> (a java.lang.Object)
at
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2888)
- locked <0x00000007018ee8d8> (a java.lang.Object)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2855)
at
org.elasticsearch.index.engine.internal.InternalEngine.commitIndexWriter(InternalEngine.java:722)
at
org.elasticsearch.index.engine.internal.InternalEngine.flush(InternalEngine.java:800)
at
org.elasticsearch.index.engine.internal.InternalEngine$RecoveryCounter.endRecovery(InternalEngine.java:1520)
at
org.elasticsearch.index.engine.internal.InternalEngine$RecoveryCounter.close(InternalEngine.java:1533)
at org.elasticsearch.common.lease.Releasables.close(Releasables.java:45)
at
org.elasticsearch.common.lease.Releasables.closeWhileHandlingException(Releasables.java:70)
at
org.elasticsearch.common.lease.Releasables.closeWhileHandlingException(Releasables.java:75)
at
org.elasticsearch.index.engine.internal.InternalEngine.recover(InternalEngine.java:1048)
at org.elasticsearch.index.shard.IndexShard.recover(IndexShard.java:635)
at
org.elasticsearch.indices.recovery.RecoverySource.recover(RecoverySource.java:120)
at
org.elasticsearch.indices.recovery.RecoverySource.access$200(RecoverySource.java:48)
at
org.elasticsearch.indices.recovery.RecoverySource$StartRecoveryTransportRequestHandler.messageReceived(RecoverySource.java:141)
at
org.elasticsearch.indices.recovery.RecoverySource$StartRecoveryTransportRequestHandler.messageReceived(RecoverySource.java:127)
at
org.elasticsearch.transport.local.LocalTransport$2.doRun(LocalTransport.java:287)
at
org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:36)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Found 1 deadlock.
{noformat}
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