[jira] [Created] (HIVE-16552) Limit the number of tasks a Spark job may contain

["Xuefu Zhang (JIRA)" <ji...@apache.org>]

Xuefu Zhang created HIVE-16552:
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             Summary: Limit the number of tasks a Spark job may contain
                 Key: HIVE-16552
                 URL: https://issues.apache.org/jira/browse/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 mapreduce.job.max.map 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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