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From "Wilfred Spiegelenburg (Jira)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-7278) Speculative execution behavior is observed even when mapreduce.map.speculative and mapreduce.reduce.speculative are false
Date Wed, 13 May 2020 01:08:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-7278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105859#comment-17105859
] 

Wilfred Spiegelenburg commented on MAPREDUCE-7278:
--------------------------------------------------

[~tarunparimi] I have added you to the contributor list for the project and assigned the jira
to you.

The test you describe I think can be converted into a test using a {{MiniMRYarnCluster}} like
what is done in the TestSpeculativeExecution. Did you look at that possibility?


> Speculative execution behavior is observed even when mapreduce.map.speculative and mapreduce.reduce.speculative
are false
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-7278
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7278
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task
>    Affects Versions: 2.8.0, 3.4.0
>            Reporter: Tarun Parimi
>            Assignee: Tarun Parimi
>            Priority: Major
>         Attachments: MAPREDUCE-7278.001.patch, MAPREDUCE-7278.002.patch, Screen Shot
2020-04-30 at 8.04.27 PM.png
>
>
> When a failed task attempt container is stuck in FAIL_FINISHING_CONTAINER state for some
time, we observe two task attempts are launched simultaneously even when speculative execution
is disabled.
> This results in the below message shown in the killed attempts, indicating speculation
has occurred. This is an issue for jobs which require speculative execution to be strictly
disabled.
>   !Screen Shot 2020-04-30 at 8.04.27 PM.png!
>  
>  



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