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From "Ufuk Celebi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-1810) UpdateTask message contains unused information
Date Wed, 01 Apr 2015 12:54:53 GMT
Ufuk Celebi created FLINK-1810:

             Summary: UpdateTask message contains unused information
                 Key: FLINK-1810
                 URL: https://issues.apache.org/jira/browse/FLINK-1810
             Project: Flink
          Issue Type: Improvement
          Components: Distributed Runtime
    Affects Versions: master
            Reporter: Ufuk Celebi
            Priority: Minor

When deploying tasks to a task manager it not guaranteed that all results are already consumable.
In such cases, the InputGate of the receiver creates "UnknownInputChannel" instances, which
are updated during runtime to Local- or RemoteInputChannel instances.

The UpdateTask Akka message which triggers this update contains unused information (the producing
task's execution attempt ID) to identify which channel to update. I found this confusing when
looking over the code and actually thought that it was a bug (because the unused information
was actually erroneous).

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