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From "Maximilian Michels (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2821) Change Akka configuration to allow accessing actors from different URLs
Date Wed, 23 Nov 2016 15:42:58 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15690454#comment-15690454

Maximilian Michels commented on FLINK-2821:

My changes don't resolve the given hostname for the JobManager anymore. This is to make sure
we provide Akka with a consistent hostname. This should work better in container scenarios
than using IPs. Does Akka replace the given hostname upon lookup? I was under the assumption
it uses the provided one. 

> Change Akka configuration to allow accessing actors from different URLs
> -----------------------------------------------------------------------
>                 Key: FLINK-2821
>                 URL: https://issues.apache.org/jira/browse/FLINK-2821
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Coordination
>            Reporter: Robert Metzger
>            Assignee: Maximilian Michels
> Akka expects the actor's URL to be exactly matching.
> As pointed out here, cases where users were complaining about this: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Error-trying-to-access-JM-through-proxy-td3018.html
>   - Proxy routing (as described here, send to the proxy URL, receiver recognizes only
original URL)
>   - Using hostname / IP interchangeably does not work (we solved this by always putting
IP addresses into URLs, never hostnames)
>   - Binding to multiple interfaces (any local does not work. Still no solution
to that (but seems not too much of a restriction)
> I am aware that this is not possible due to Akka, so it is actually not a Flink bug.
But I think we should track the resolution of the issue here anyways because its affecting
our user's satisfaction.

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