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https://issues.apache.org/jira/browse/HDFS-12098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16083334#comment-16083334
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Weiwei Yang commented on HDFS-12098:
------------------------------------
Hi [~anu]
The difference I noticed is in the mini cluster, the RPC seems directly times
out without retrying, not sure why the retry policy was not applied. On my
setup I saw following retries in getVersion call,
{noformat}
17/07/11 19:27:05 INFO ipc.Client: Retrying connect to server:
ozone1.fyre.ibm.com/172.16.165.133:9861. Already tried 4 time(s); retry policy
is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000
MILLISECONDS)
17/07/11 19:27:06 INFO ipc.Client: Retrying connect to server:
ozone1.fyre.ibm.com/172.16.165.133:9861. Already tried 5 time(s); retry policy
is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000
MILLISECONDS)
17/07/11 19:27:07 INFO ipc.Client: Retrying connect to server:
ozone1.fyre.ibm.com/172.16.165.133:9861. Already tried 6 time(s); retry policy
is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000
MILLISECONDS)
{noformat}
these retries will keep the thread alive even the task execution is done. I
will try to reproduce in a test case.
Thank you for looking at this.
> 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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