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https://issues.apache.org/jira/browse/FLINK-4451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15464545#comment-15464545
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Till Rohrmann commented on FLINK-4451:
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Fixed via 0cf2a822b6872ee4f3f0c99f0fcee71affaeaee5
> Throw exception when remote connection cannot be resolved
> ---------------------------------------------------------
>
> Key: FLINK-4451
> URL: https://issues.apache.org/jira/browse/FLINK-4451
> Project: Flink
> Issue Type: Sub-task
> Components: Distributed Coordination
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
>
> The {{RpcService}} implementation should throw an exception (returned in the
> future) if {{RpcService.connect(address, type)}} cannot connect to the remote
> {{RpcEndpoint}}.
> At the moment the {{AkkaRpcService}} does not check that the
> {{IdentifyActor}} message contains a valid {{ActorRef}} and throws due to
> that a {{NullPointerException}}.
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