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https://issues.apache.org/jira/browse/HDFS-14655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16927900#comment-16927900
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Ayush Saxena edited comment on HDFS-14655 at 9/11/19 7:00 PM:
--------------------------------------------------------------

Yes, As I said above too, It interrupts But doesn’t kill, Then is Client.java 
it checks whether the thread is interrupted or not, if interrupted then it 
stops retrying, IIRC
So thread can be reused..


was (Author: ayushtkn):
Yes, As I said above too, It interrupts But doesn’t kill, Then is Client.java 
it checks whether the thread is interrupted or not, if interrupted then the 
thread is killed, IIRC

> [SBN Read] Namenode crashes if one of The JN is down
> ----------------------------------------------------
>
>                 Key: HDFS-14655
>                 URL: https://issues.apache.org/jira/browse/HDFS-14655
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.3.0
>            Reporter: Harshakiran Reddy
>            Assignee: Ayush Saxena
>            Priority: Critical
>         Attachments: HDFS-14655-01.patch, HDFS-14655-02.patch, 
> HDFS-14655-03.patch, HDFS-14655-04.patch, HDFS-14655.poc.patch
>
>
> {noformat}
> 2019-07-04 17:35:54,064 | INFO  | Logger channel (from parallel executor) to 
> XXXXXXX/XXXXXXX | Retrying connect to server: XXXXXXX/XXXXXXX. Already tried 
> 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, 
> sleepTime=1000 MILLISECONDS) | Client.java:975
> 2019-07-04 17:35:54,087 | FATAL | Edit log tailer | Unknown error encountered 
> while tailing edits. Shutting down standby NN. | EditLogTailer.java:474
> java.lang.OutOfMemoryError: unable to create new native thread
>       at java.lang.Thread.start0(Native Method)
>       at java.lang.Thread.start(Thread.java:717)
>       at 
> java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:957)
>       at 
> java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1378)
>       at 
> com.google.common.util.concurrent.MoreExecutors$ListeningDecorator.execute(MoreExecutors.java:440)
>       at 
> com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:56)
>       at 
> org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannel.getJournaledEdits(IPCLoggerChannel.java:565)
>       at 
> org.apache.hadoop.hdfs.qjournal.client.AsyncLoggerSet.getJournaledEdits(AsyncLoggerSet.java:272)
>       at 
> org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.selectRpcInputStreams(QuorumJournalManager.java:533)
>       at 
> org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.selectInputStreams(QuorumJournalManager.java:508)
>       at 
> org.apache.hadoop.hdfs.server.namenode.JournalSet.selectInputStreams(JournalSet.java:275)
>       at 
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.selectInputStreams(FSEditLog.java:1681)
>       at 
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.selectInputStreams(FSEditLog.java:1714)
>       at 
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:307)
>       at 
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:460)
>       at 
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$300(EditLogTailer.java:410)
>       at 
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:427)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:360)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1709)
>       at 
> org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:483)
>       at 
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:423)
> 2019-07-04 17:35:54,112 | INFO  | Edit log tailer | Exiting with status 1: 
> java.lang.OutOfMemoryError: unable to create new native thread | 
> ExitUtil.java:210
> {noformat}



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