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Posted to issues@hive.apache.org by "Rajesh Balamohan (Jira)" <ji...@apache.org> on 2020/04/15 07:37:00 UTC

[jira] [Updated] (HIVE-23210) Fix shortestjobcomparator when jobs submitted have 1 task their vertices

     [ https://issues.apache.org/jira/browse/HIVE-23210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajesh Balamohan updated HIVE-23210:
------------------------------------
    Attachment: TestShortestJobFirstComparator.java

> Fix shortestjobcomparator when jobs submitted have 1 task their vertices
> ------------------------------------------------------------------------
>
>                 Key: HIVE-23210
>                 URL: https://issues.apache.org/jira/browse/HIVE-23210
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Priority: Major
>         Attachments: TestShortestJobFirstComparator.java
>
>
> In latency sensitive queries, lots of jobs can have vertices with 1 task. Currently shortestjobcomparator does not work correctly and returns tasks in random order.
> [https://github.com/apache/hive/blob/master/llap-server/src/java/org/apache/hadoop/hive/llap/daemon/impl/comparator/ShortestJobFirstComparator.java#L51]
> This causes delay in the job runtime. I will attach a simple test case shortly.



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