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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-23948) Trigger mapstage's job listener in submitMissingTasks
Date Tue, 17 Apr 2018 14:05:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-23948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16440887#comment-16440887
] 

Apache Spark commented on SPARK-23948:
--------------------------------------

User 'squito' has created a pull request for this issue:
https://github.com/apache/spark/pull/21085

> Trigger mapstage's job listener in submitMissingTasks
> -----------------------------------------------------
>
>                 Key: SPARK-23948
>                 URL: https://issues.apache.org/jira/browse/SPARK-23948
>             Project: Spark
>          Issue Type: New Feature
>          Components: Scheduler, Spark Core
>    Affects Versions: 2.3.0
>            Reporter: jin xing
>            Assignee: jin xing
>            Priority: Major
>             Fix For: 2.4.0
>
>
> SparkContext submitted a map stage from "submitMapStage" to DAGScheduler, 
> "markMapStageJobAsFinished" is called only in (https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala#L933
    and       https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala#L1314);
> But think about below scenario:
> 1. stage0 and stage1 are all "ShuffleMapStage" and stage1 depends on stage0;
> 2. We submit stage1 by "submitMapStage";
> 3. When stage 1 running, "FetchFailed" happened, stage0 and stage1 got resubmitted as
stage0_1 and stage1_1;
> 4. When stage0_1 running, speculated tasks in old stage1 come as succeeded, but stage1
is not inside "runningStages". So even though all splits(including the speculated tasks) in
stage1 succeeded, job listener in stage1 will not be called;
> 5. stage0_1 finished, stage1_1 starts running. When "submitMissingTasks", there is no
missing tasks. But in current code, job listener is not triggered



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