hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9863) Snappy compression in branch1 cannot work on Big-Endian 64 bit platform w/o backporting HADOOP-8686
Date Sun, 11 Aug 2013 21:41:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13736422#comment-13736422
] 

Eric Yang commented on HADOOP-9863:
-----------------------------------

JINT_MAX assumes a fixed size for 64bit signed integer. This may not always be the case for
other platforms.  It would be good to use:

#include <limits.h>, and check with INT_MAX instead.

                
> Snappy compression in branch1 cannot work on Big-Endian 64 bit platform w/o backporting
HADOOP-8686
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9863
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9863
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: native
>    Affects Versions: 1.1.1, 1.1.2, 1.2.1
>            Reporter: Yu Li
>            Assignee: Yu Li
>              Labels: native, ppc64, snappy
>         Attachments: HADOOP-9863.patch
>
>
> w/o changes made in HADOOP-8686 on SnappyCompressor.c, snappy compression in branch-1
hadoop on big endian 64 bit platform (ppc64 for example) will generate incorrect .snappy (almost-empty)
file because of type casting from size_t to jint. Will include more detailed analysis in comments.

--
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