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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-10292) Generate JobGraph in StandaloneJobClusterEntrypoint only once
Date Tue, 02 Oct 2018 11:45:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-10292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635339#comment-16635339
] 

ASF GitHub Bot commented on FLINK-10292:
----------------------------------------

zentol opened a new pull request #6786: [FLINK-10292][rest] Separate REST and Dispatcher RPC
thread pools
URL: https://github.com/apache/flink/pull/6786
 
 
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   ## What is the purpose of the change
   
   This PR separates the REST and DispatcherRPC thread pools. Basically the `WebMonitorEndpoint`
creates it's own `ExecutorService` based on the `rest.server.numThreads` option, instead of
being passed the Dispatcher RPC's `Executor`.
   
   ## Brief change log
   
   * add `RestOptions#SERVER_NUM_THREADS`
   *  extend `RestServerEndpointConfiguration` to process new option (this change is questionable
since the `RestServerEndpoint` never uses this option)
   * create `ExecutorService` in `WebMonitorEndpoint`.
   
   ## Verifying this change
   
   I've added a basic test to cover the behavior of the `RestServerEndpointConfiguration`.
   
   Testing the executor service itself is possible (submit N blocking tasks, count how many
end up blocking, assert numBlocking==configuredNumThreads) but getting it stable is tricky.
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes )
     - If yes, how is the feature documented? (docs)
   

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> Generate JobGraph in StandaloneJobClusterEntrypoint only once
> -------------------------------------------------------------
>
>                 Key: FLINK-10292
>                 URL: https://issues.apache.org/jira/browse/FLINK-10292
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Coordination
>    Affects Versions: 1.6.0, 1.7.0
>            Reporter: Till Rohrmann
>            Assignee: vinoyang
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.7.0, 1.6.2
>
>
> Currently the {{StandaloneJobClusterEntrypoint}} generates the {{JobGraph}} from the
given user code every time it starts/is restarted. This can be problematic if the the {{JobGraph}}
generation has side effects. Therefore, it would be better to generate the {{JobGraph}} only
once and store it in HA storage instead from where to retrieve.



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