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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12115) Ozone: SCM: Add queryNode RPC Call
Date Tue, 11 Jul 2017 17:02:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16082516#comment-16082516

Anu Engineer commented on HDFS-12115:

bq.  For example, if a node is HEALTHY, can it be also RAFT_MEMBER? 
Yes, if a node is healthy it can be a RAFT member, hence the status array in the query parameter.

bq. TestQueryNode do we have to restart 2 dns at the end of the test?
I am not sure what the guarantees from JUnit are,  but many unit testing systems have no guarantee
on the order of how the tests are executed. For example, it will run test2, test1 or test1,
test2. So each test attempts to leave the test fixtures of the test in the state it found
it in. May be it is not required and I should probably look up the Junit testing framework's
execution guarantees.  But this is why I am restarting the datanodes.

> Ozone: SCM: Add queryNode RPC Call
> ----------------------------------
>                 Key: HDFS-12115
>                 URL: https://issues.apache.org/jira/browse/HDFS-12115
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Anu Engineer
>            Assignee: Anu Engineer
>             Fix For: HDFS-7240
>         Attachments: HDFS-12115-HDFS-7240.001.patch
> Add queryNode RPC to Storage container location protocol. This allows applications like
SCM CLI to get the list of nodes in various states, like Healthy, live or Dead.

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