hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kevin Wilfong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-3707) Round map/reduce progress down when it is in the range [99.5, 100)
Date Tue, 13 Nov 2012 23:12:13 GMT

     [ https://issues.apache.org/jira/browse/HIVE-3707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kevin Wilfong updated HIVE-3707:
--------------------------------

    Attachment: HIVE-3707.1.patch.txt
    
> Round map/reduce progress down when it is in the range [99.5, 100)
> ------------------------------------------------------------------
>
>                 Key: HIVE-3707
>                 URL: https://issues.apache.org/jira/browse/HIVE-3707
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logging, Query Processor
>    Affects Versions: 0.10.0
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>            Priority: Minor
>         Attachments: HIVE-3707.1.patch.txt
>
>
> In HadoopJobExecHelper the mapProgress and reduceProgress are the value of these counters
taken from the running job rounded to an integer percentage.  This means that e.g. if the
mappers are 99.5% done this is stored as 100%.
> One of the most common questions I see from new users is, the map and reduce both report
being 100% done, why is the query still running?
> By rounding down the value in this interval so it's only 100% when it's really 100% we
could avoid that confusion.
> Also, the way it appears the QueryPlan and MapRedTask determine if the map/reduce phases
are done is by checking if this value == 100.  I couldn't find anywhere where they're used
for anything significant, but they're reporting early completion.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message