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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12098) Ozone: Datanode is unable to register with scm if scm starts later
Date Fri, 14 Jul 2017 00:50:01 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16086658#comment-16086658
] 

Weiwei Yang commented on HDFS-12098:
------------------------------------

Hi [~anu]

bq. Looks like the main does call, SCM constructor ...

The main method you pasted is only called if scm is started, in bin/hdfs

{code}
scm)
  HADOOP_CLASSNAME='org.apache.hadoop.ozone.scm.StorageContainerManager'
  ...
{code}

if I don't start scm (like how I reproduce this issue in the description), it won't be called,
and the port will not be bound. That's what I meant.

Thanks

> Ozone: Datanode is unable to register with scm if scm starts later
> ------------------------------------------------------------------
>
>                 Key: HDFS-12098
>                 URL: https://issues.apache.org/jira/browse/HDFS-12098
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, ozone, scm
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>            Priority: Critical
>         Attachments: disabled-scm-test.patch, HDFS-12098-HDFS-7240.001.patch, HDFS-12098-HDFS-7240.002.patch,
Screen Shot 2017-07-11 at 4.58.08 PM.png, thread_dump.log
>
>
> Reproducing steps
> # Start datanode
> # Wait and see datanode state, it has connection issues, this is expected
> # Start SCM, expecting datanode could connect to the scm and the state machine could
transit to RUNNING. However in actual, its state transits to SHUTDOWN, datanode enters chill
mode.



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