hadoop-mapreduce-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (MAPREDUCE-1339) Sqoop full table import job times out when using the split-by attribute
Date Mon, 03 May 2010 18:46:01 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron Kimball resolved MAPREDUCE-1339.
--------------------------------------

    Resolution: Duplicate

Sqoop has been removed from MapReduce; closing this issue. Also, Oracle functionality has
been improved in the mean time so as to obviate this bug.

> Sqoop full table import job times out when using the split-by attribute
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1339
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1339
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/sqoop
>    Affects Versions: 0.22.0
>            Reporter: Leonid Furman
>            Priority: Critical
>             Fix For: 0.22.0
>
>
> Problem
> ------------
> When running sqoop command for full table import with split-by attribute specified, as
follows:
> sqoop --connect CONNECT_STRING --username USER_NAME --password PASSWORD --table TABLE_NAME
--fields-terminated-by \\0x01 --as-textfile  --warehouse-dir OUTPUT_DIR split-by RECORD_ID
> Sqoop is going to transform the split-by attribute to ORDER BY clause and run the following
query in SQL (say, Oracle):
> SELECT * FROM TABLE_NAME ORDER BY RECORD_ID
> If the table has, for example, 20 million records, the ORDER BY part will increase the
query running significantly, eventually causing time out, and resulting in no output written
to Hadoop file system.
> Proposed solution
> -------------------------
> Not to append the ORDER_BY clause to SQL query if no where clause is specified.
> Can there be any issues with this solution?

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message