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Posted to dev@hive.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2012/05/14 04:27:48 UTC
[jira] [Commented] (HIVE-2711) Make the header of RCFile unique
[ https://issues.apache.org/jira/browse/HIVE-2711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13274414#comment-13274414 ]
Hudson commented on HIVE-2711:
------------------------------
Integrated in Hive-trunk-h0.21 #1428 (See [https://builds.apache.org/job/Hive-trunk-h0.21/1428/])
HIVE-3018 Make the new header for RC Files introduced in HIVE-2711 optional
(Kevin Wilfong via namit) (Revision 1337937)
Result = FAILURE
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1337937
Files :
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/RCFile.java
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/io/TestRCFile.java
> Make the header of RCFile unique
> --------------------------------
>
> Key: HIVE-2711
> URL: https://issues.apache.org/jira/browse/HIVE-2711
> Project: Hive
> Issue Type: Bug
> Components: Serializers/Deserializers
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Fix For: 0.10.0
>
> Attachments: HIVE-2711.D2115.1.patch, HIVE-2711.D2115.2.patch, HIVE-2711.D2115.3.patch, HIVE-2711.D2571.1.patch, rc-file-v0.rc
>
>
> The RCFile implementation was copied from Hadoop's SequenceFile and copied the 'magic' string in the header. This means that you can't use the header to distinguish between RCFiles and SequenceFiles.
> I'd propose that we create a new header for RCFiles (RCF?) to replace the current SEQ. To maintain compatibility, we'll need to continue to accept the current 'SEQ\06' and just make new files contain the new header.
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