Jeffrey Morlan created LUCENE-6670:
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Summary: OOM error in merge causes deadlock
Key: LUCENE-6670
URL: https://issues.apache.org/jira/browse/LUCENE-6670
Project: Lucene - Core
Issue Type: Bug
Affects Versions: 5.2.1
Reporter: Jeffrey Morlan
Using the ConcurrentMergeScheduler, when merging catches an OutOfMemoryError
and tries to rollback, the merge thread ends up calling Thread.join on itself,
which will never complete.
Stack trace (line numbers are for Lucene 5.2.1):
{noformat}
"Lucene Merge Thread #1" #356502 daemon prio=5 os_prio=0 tid=0x00007f3f78622000
nid=0x11b5 in Object.wait() [0x00007f3e90528000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1245)
- locked <0x00000001965aff78> (a
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread)
at java.lang.Thread.join(Thread.java:1319)
at
org.apache.lucene.index.ConcurrentMergeScheduler.sync(ConcurrentMergeScheduler.java:420)
at
org.apache.lucene.index.ConcurrentMergeScheduler.close(ConcurrentMergeScheduler.java:401)
at
org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:1948)
at org.apache.lucene.index.IndexWriter.rollback(IndexWriter.java:1921)
- locked <0x00000001965b0100> (a java.lang.Object)
at
org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:4439)
- locked <0x00000001965b0100> (a java.lang.Object)
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3571)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:581)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:619)
{noformat}
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