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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5529) Binary incompatibilities in mapred.lib.TotalOrderPartitioner between branch-1 and branch-2
Date Fri, 27 Sep 2013 20:01:04 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy updated MAPREDUCE-5529:
-------------------------------------

    Attachment: MAPREDUCE-5529_branch_2.patch

Sigh, I needed to modify the branch-2 patch since MAPREDUCE-4594 is only on trunk

[~qwertymaniac]: in future, please don't commit simple enhancements such as MAPREDU-4594 only
to trunk. Thanks.
                
> Binary incompatibilities in mapred.lib.TotalOrderPartitioner between branch-1 and branch-2
> ------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5529
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5529
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv1, mrv2
>    Affects Versions: 2.1.1-beta
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>            Priority: Blocker
>         Attachments: MAPREDUCE-5529_branch_2.patch, MAPREDUCE-5529.patch, MAPREDUCE-5529.patch
>
>
> {{mapred.lib.TotalOrderPartitioner}} in branch-1 has these two methods:
> {code:java}
> public static String getPartitionFile(JobConf job)
> public static void setPartitionFile(JobConf job, Path p)
> {code}
> In branch-2, {{mapred.lib.TotalOrderPartitioner}} is now a subclass of {{mapred.lib.TotalOrderPartitioner}},
from which it inherits the similar methods:
> {code:java}
> public static String getPartitionFile(Configuration conf)
> public static void setPartitionFile(Configuration conf, Path p)
> {code}
> This means that any code that does either of the following:
> {code:java}
> TotalOrderPartitioner.setPartitionFile(new JobConf(), new Path("/"));
> String str = TotalOrderPartitioner.getPartitionFile(new JobConf());
> {code}
> will not be binary compatible (that is, if compiled against branch-1, it will throw a
{{NoSuchMethodError}} if run against branch-2).

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