[jira] Commented: (HADOOP-4324) Need a way to get the inforserver port of a name node

["Doug Cutting (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12636102#action_12636102 ] 

Doug Cutting commented on HADOOP-4324:
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I'm generally not a fan of using the Configuration for output.  A Configuration is a generic input mechanism for metadata, not a read/write blackboard for state.

> Need a way to get the inforserver port of a name node
> -----------------------------------------------------
>
>                 Key: HADOOP-4324
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4324
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.20.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>
> To test that services shut down cleanly, I need to know the port that the namenode brings up an info server on, which means that its assigned port value needs to be exported from the namesystem.
> I can see two ways to do this, and wish some recommendations of the best approach
> 1.  extract the port value when the FSNameSystem comes up, and add it to that classes Conf; add a method to get that Conf so that its state can be read.
> 2.  save the port value to a member variable in FSNameSystem and provide a public method to get at it.
> My preference is for #1, as it is consistent with how the NameNode saves its port value, and doesn't change any APIs.

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