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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2125) alter table concatenate fails and deletes data
Date Tue, 26 Apr 2011 22:27:03 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

He Yongqiang updated HIVE-2125:
-------------------------------

    Attachment: HIVE-2125.2.patch

> alter table concatenate fails and deletes data
> ----------------------------------------------
>
>                 Key: HIVE-2125
>                 URL: https://issues.apache.org/jira/browse/HIVE-2125
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Joydeep Sen Sarma
>            Assignee: He Yongqiang
>            Priority: Critical
>         Attachments: HIVE-2125.1.patch, HIVE-2125.2.patch
>
>
> the number of reducers is not set by this command (unlike other hive queries). since
mapred.reduce.tasks=-1 (to let hive infer this automatically) - jobtracker fails the job (number
of reducers cannot be negative)
> hive> alter table ad_imps_2 partition(ds='2009-06-16') concatenate;
> alter table ad_imps_2 partition(ds='2009-06-16') concatenate;
> Starting Job = job_201103101203_453180, Tracking URL = http://curium.data.facebook.com:50030/jobdetails.jsp?jobid=job_201103101203_453180
> Kill Command = /mnt/vol/hive/sites/curium/hadoop/bin/../bin/hadoop job  -Dmapred.job.tracker=curium.data.facebook.com:50029
-kill job_201103101203_453180
> Hadoop job information for null: number of mappers: 0; number of reducers: 0
> 2011-04-22 10:21:24,046 null map = 100%,  reduce = 100%
> Ended Job = job_201103101203_453180 with errors
> Moved to trash: /user/facebook/warehouse/ad_imps_2/_backup.ds=2009-06-16
> after the job fails - the partition is deleted
> thankfully it's still in trash

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