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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6651) MCollectorOutputHandler.cc makes misaligned accesses, coredumps ensue
Date Wed, 16 Mar 2016 13:15:33 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15197286#comment-15197286
] 

Hadoop QA commented on MAPREDUCE-6651:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s {color} | {color:blue}
Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s {color} | {color:red}
MAPREDUCE-6651 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12793721/MAPREDUCE-6651.001.patch
|
| JIRA Issue | MAPREDUCE-6651 |
| Console output | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6380/console |
| Powered by | Apache Yetus 0.2.0   http://yetus.apache.org |


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> MCollectorOutputHandler.cc makes misaligned accesses, coredumps ensue
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6651
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6651
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: client
>    Affects Versions: 2.7.2
>         Environment: Any platform with alignment constraints
>            Reporter: Alan Burlison
>            Assignee: Alan Burlison
>         Attachments: MAPREDUCE-6651.001.patch
>
>
> MCollectorOutputHandler.cc casts a misaligned byte pointer to a KVBufferWithParititionId,
which causes coredumps on any platform with alignment constraints, such as SPARC. The misaligned
structure needs to be copied into a local, aligned structure and the data referenced from
there.



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