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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2722) Use InetAddress.getLocalHost() first when detecting TaskManager IP address
Date Tue, 22 Sep 2015 12:57:05 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14902544#comment-14902544
] 

ASF GitHub Bot commented on FLINK-2722:
---------------------------------------

Github user tillrohrmann commented on the pull request:

    https://github.com/apache/flink/pull/1159#issuecomment-142279741
  
    Except for the missing test case, it looks good to me.


> Use InetAddress.getLocalHost() first when detecting TaskManager IP address
> --------------------------------------------------------------------------
>
>                 Key: FLINK-2722
>                 URL: https://issues.apache.org/jira/browse/FLINK-2722
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Runtime, TaskManager
>    Affects Versions: 0.9, 0.10
>            Reporter: Robert Metzger
>            Assignee: Robert Metzger
>             Fix For: 0.9.2
>
>
> A user reported a connection issue with Netty being unable to connect to a TaskManager
to subscribe to an intermediate result.
> The problem occurred when the TaskManager and JobManager were running on the same host
(something that can easily happen on YARN).
> In that case, the TaskManager was reporting a host-local ip address to the JobManager
when connecting.
> To avoid the issue in the future, the TaskManager first tries to use the hostname returned
by InetAddress.getLocalHost(). In a properly set-up environment, this will return a connection
which is accessible by all machines in a cluster.



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