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Posted to mapreduce-issues@hadoop.apache.org by "Ahmed Hussein (Jira)" <ji...@apache.org> on 2019/12/20 21:00:00 UTC

[jira] [Updated] (MAPREDUCE-7252) Handling 0 progress in SimpleExponential task runtime estimator

     [ https://issues.apache.org/jira/browse/MAPREDUCE-7252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ahmed Hussein updated MAPREDUCE-7252:
-------------------------------------
    Attachment: MAPREDUCE-7252.001.patch

> Handling 0 progress in SimpleExponential task runtime estimator
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-7252
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7252
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Minor
>         Attachments: MAPREDUCE-7252.001.patch
>
>
> The simple exponential runtime estimator (added in MAPREDUCE-7208) seems not to handle the corner cases where the delta progress is 0. As a result, the forecast will be NaN or Inf which messes up the subsequent forecast values.



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