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From "Xuefu Zhang (JIRA)" <>
Subject [jira] [Created] (HIVE-16552) Limit the number of tasks a Spark job may contain
Date Thu, 27 Apr 2017 20:07:04 GMT
Xuefu Zhang created HIVE-16552:

             Summary: Limit the number of tasks a Spark job may contain
                 Key: HIVE-16552
             Project: Hive
          Issue Type: Improvement
          Components: Spark
            Reporter: Xuefu Zhang
            Assignee: Xuefu Zhang

It's commonly desirable to block bad and big queries that takes a lot of YARN resources. One
approach, similar to in MapReduce, is to stop a query that invokes a
Spark job that contains too many tasks. The proposal here is to introduce hive.spark.job.max.tasks
with a default value of -1 (no limit), which an admin can set to block queries that trigger
too many spark tasks.

Please note that this control knob applies to a spark job, though it's possible that one query
can trigger multiple Spark jobs (such as in case of map-join). Nevertheless, the proposed
approach is still helpful.

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