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https://issues.apache.org/jira/browse/HDFS-9684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15119871#comment-15119871
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Surendra Singh Lilhore commented on HDFS-9684:
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Yes, DN should have some healthcheck to monitor all the service threads.
For OutOfMemoryError one discussion happened in HDFS-2911 and I think
conclusion is to kill the DN in case of OOM.
> DataNode stopped sending heartbeat after getting OutOfMemoryError form
> DataTransfer thread.
> -------------------------------------------------------------------------------------------
>
> Key: HDFS-9684
> URL: https://issues.apache.org/jira/browse/HDFS-9684
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.7.1
> Reporter: Surendra Singh Lilhore
> Assignee: Surendra Singh Lilhore
> Priority: Blocker
> Attachments: HDFS-9684.01.patch
>
>
> {noformat}
> java.lang.OutOfMemoryError: unable to create new native thread
> at java.lang.Thread.start0(Native Method)
> at java.lang.Thread.start(Thread.java:714)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.transferBlock(DataNode.java:1999)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.transferBlocks(DataNode.java:2008)
> at
> org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActive(BPOfferService.java:657)
> at
> org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActor(BPOfferService.java:615)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.processCommand(BPServiceActor.java:857)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:671)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:823)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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