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https://issues.apache.org/jira/browse/HBASE-21482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Ted Yu updated HBASE-21482:
---------------------------
    Attachment: org.apache.hadoop.hbase.regionserver.TestHRegion-output.txt

> TestHRegion fails due to 'Too many open files'
> ----------------------------------------------
>
>                 Key: HBASE-21482
>                 URL: https://issues.apache.org/jira/browse/HBASE-21482
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Priority: Major
>         Attachments: 
> org.apache.hadoop.hbase.regionserver.TestHRegion-output.txt, 
> org.apache.hadoop.hbase.regionserver.TestHRegion.txt
>
>
> TestHRegion fails due to 'Too many open files' in master branch.
> Here is one failed subtest :
> {code}
> testCheckAndDelete_ThatDeleteWasWritten(org.apache.hadoop.hbase.regionserver.TestHRegion)
>   Time elapsed: 2.373 sec  <<< ERROR!
> java.lang.IllegalStateException: failed to create a child event loop
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4853)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4844)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4835)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.testCheckAndDelete_ThatDeleteWasWritten(TestHRegion.java:2034)
> Caused by: org.apache.hbase.thirdparty.io.netty.channel.ChannelException: 
> failed to open a new selector
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4853)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4844)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4835)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.testCheckAndDelete_ThatDeleteWasWritten(TestHRegion.java:2034)
> Caused by: java.io.IOException: Too many open files
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4853)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4844)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.initHRegion(TestHRegion.java:4835)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHRegion.testCheckAndDelete_ThatDeleteWasWritten(TestHRegion.java:2034)
> {code}



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