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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