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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/04/16 01:53:26 UTC

[jira] [Assigned] (SPARK-14649) DagScheduler runs duplicate tasks on fetch failure

     [ https://issues.apache.org/jira/browse/SPARK-14649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-14649:
------------------------------------

    Assignee:     (was: Apache Spark)

> DagScheduler runs duplicate tasks on fetch failure
> --------------------------------------------------
>
>                 Key: SPARK-14649
>                 URL: https://issues.apache.org/jira/browse/SPARK-14649
>             Project: Spark
>          Issue Type: Bug
>          Components: Scheduler
>            Reporter: Sital Kedia
>
> When running a job we found out that there are many duplicate tasks running after fetch failure in a stage. The issue is that when submitting tasks for a stage, the dag scheduler submits all the pending tasks (tasks whose output is not available). But out of those pending tasks, some tasks might already be running on the cluster. The dag scheduler need to submit only non-running tasks for a stage. 



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