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Ted Yu commented on HBASE-7871: ------------------------------- I used the following command at the root of trunk to see where getMetrics(MetricsBuilder metricsBuilder, boolean all) is called: find . -name '*.java' -exec grep 'getMetrics(' {} \; -print | grep -v 'getMetrics()' I only saw reference in tests, such as hbase-hadoop1-compat/src/test/java/org/apache/hadoop/hbase/test/MetricsAssertHelperImpl.java, etc. > HBase can be stuck when closing regions concurrently > ----------------------------------------------------- > > Key: HBASE-7871 > URL: https://issues.apache.org/jira/browse/HBASE-7871 > Project: HBase > Issue Type: Bug > Components: master > Affects Versions: 0.96.0 > Reporter: Nicolas Liochon > Assignee: Ted Yu > Priority: Critical > Fix For: 0.95.0, 0.98.0 > > Attachments: 7871.patch, 7871-v2.patch, s1.txt, TestStartStop.java > > > The attached test fails ~1% of the the time on 0.96. It seems it does not > fail on 0.94.5. It's simple: a table creation and some puts. > I attach the stack. Logs says nothing it seems. > The suspicious part is: > {noformat} > "RS_CLOSE_REGION-localhost,57575,1361197489166-2" prio=10 > tid=0x00007fb0c8775800 nid=0x61ac runnable [0x00007fb09f272000] > java.lang.Thread.State: RUNNABLE > at java.util.TreeMap.fixAfterDeletion(TreeMap.java:2193) > at java.util.TreeMap.deleteEntry(TreeMap.java:2151) > at java.util.TreeMap.remove(TreeMap.java:585) > at java.util.TreeSet.remove(TreeSet.java:259) > at > org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl.deregister(MetricsRegionAggregateSourceImpl.java:55) > at > org.apache.hadoop.hbase.regionserver.MetricsRegionSourceImpl.close(MetricsRegionSourceImpl.java:86) > at > org.apache.hadoop.hbase.regionserver.MetricsRegion.close(MetricsRegion.java:40) > at > org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1063) > at > org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:969) > - locked <0x00000006944e2558> (a java.lang.Object) > at > org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:146) > at > org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:203) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:662) > {noformat} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira