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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8623) ConnectionUtilsTest.testReturnLocalHostAddressUsingHeuristics unstable on Travis
Date Fri, 09 Mar 2018 12:58:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16392849#comment-16392849
] 

ASF GitHub Bot commented on FLINK-8623:
---------------------------------------

Github user StephanEwen commented on the issue:

    https://github.com/apache/flink/pull/5449
  
    This breaks the expected behavior, unfortunately.
    
    The logic is as follows:
      - try to connect to JM / RM / ZK and use an interface that you can connect from, if
possible
      - if that does not work, fall back to your default interface (`getLocalHost()`) - the
heuristic
    
    If we change step 2 to use `getByName("localhost")` it gives us the loopback interface
which no one external can connect to. That would basically mean that TM is isolated for any
data communication.
    
    The change to `ConnectionUtils` cannot be made like this. Instead, I would suggest to
look at why the instability happens and fix the test instead (retry or a better test approach).


> ConnectionUtilsTest.testReturnLocalHostAddressUsingHeuristics unstable on Travis
> --------------------------------------------------------------------------------
>
>                 Key: FLINK-8623
>                 URL: https://issues.apache.org/jira/browse/FLINK-8623
>             Project: Flink
>          Issue Type: Bug
>          Components: Tests
>    Affects Versions: 1.5.0
>            Reporter: Till Rohrmann
>            Priority: Blocker
>              Labels: test-stability
>             Fix For: 1.5.0, 1.4.3
>
>
> {{ConnectionUtilsTest.testReturnLocalHostAddressUsingHeuristics}} fails on Travis: https://travis-ci.org/apache/flink/jobs/339344442



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