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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 13:18:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-10292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635469#comment-16635469

ASF GitHub Bot commented on FLINK-10292:

tillrohrmann commented on a change in pull request #6786: [FLINK-10292][rest] Separate REST
and Dispatcher RPC thread pools
URL: https://github.com/apache/flink/pull/6786#discussion_r221945212

 File path: flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java
 @@ -180,7 +183,7 @@ public WebMonitorEndpoint(
 		this.restConfiguration = Preconditions.checkNotNull(restConfiguration);
 		this.resourceManagerRetriever = Preconditions.checkNotNull(resourceManagerRetriever);
 		this.transientBlobService = Preconditions.checkNotNull(transientBlobService);
-		this.executor = Preconditions.checkNotNull(executor);
+		this.executor = Executors.newFixedThreadPool(endpointConfiguration.getNumThreads(), new
ExecutorThreadFactory("Flink-" + getClass().getSimpleName()));
 Review comment:
   This could be a follow up: Can we start the threads with `Thread.MIN_PRIORITY` in order
to avoid congestion wrt the rpc threads?

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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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