[ https://issues.apache.org/jira/browse/HBASE-14305?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yu Li updated HBASE-14305: -------------------------- Summary: TestHRegion.testWritesWhileGetting hangs during Unit Testing (was: Deadlock observed in MVCC during Unit Testing) > TestHRegion.testWritesWhileGetting hangs during Unit Testing > ------------------------------------------------------------ > > Key: HBASE-14305 > URL: https://issues.apache.org/jira/browse/HBASE-14305 > Project: HBase > Issue Type: Bug > Affects Versions: 2.0.0 > Reporter: Yu Li > > As titled, this failure is reported in a UT check by HadoopQA, below is part > of the jstack output: > {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 waiting on waitQueue never got notified and cause the case a zombie > Full jstack output please refer to [this > link|https://builds.apache.org/job/PreCommit-HBASE-Build/15244//consoleFull] -- This message was sent by Atlassian JIRA (v6.3.4#6332)