Yu Li created HBASE-14305:
-----------------------------
Summary: Deadlock observed in MVCC during Unit Testing
Key: HBASE-14305
URL: https://issues.apache.org/jira/browse/HBASE-14305
Project: HBase
Issue Type: Bug
Reporter: Yu Li
As titled, this failure is reported in a UT check by HadoopQA, below is part of
the stack trace:
{noformat}
"main" prio=10 tid=0x00007fb77000a800 nid=0x5004 in Object.wait()
[0x00007fb778799000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007ee9a5260> (a java.util.LinkedList)
at
org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.waitForPreviousTransactionsComplete(MultiVersionConcurrencyControl.java:224)
- locked <0x00000007ee9a5260> (a java.util.LinkedList)
at
org.apache.hadoop.hbase.regionserver.HRegion.internalPrepareFlushCache(HRegion.java:2254)
at
org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2061)
at
org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2026)
at
org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2016)
at
org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1423)
at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1344)
- locked <0x00000007ee9c85e8> (a java.lang.Object)
at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1295)
at
org.apache.hadoop.hbase.HBaseTestingUtility.closeRegionAndWAL(HBaseTestingUtility.java:352)
at
org.apache.hadoop.hbase.regionserver.TestHRegion.testWritesWhileGetting(TestHRegion.java:3999)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
{noformat}
It seems we are waiting on the same waitQueue object after got its lock.
Full stack trace please refer to [this
link|https://builds.apache.org/job/PreCommit-HBASE-Build/15244//consoleFull]
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