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From "Robert Kanter (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5529) Binary incompatibilities in mapred.lib.TotalOrderPartitioner between branch-1 and branch-2
Date Tue, 24 Sep 2013 00:02:03 GMT
Robert Kanter created MAPREDUCE-5529:
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             Summary: 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: Bug
          Components: mrv1, mrv2
    Affects Versions: 2.1.1-beta
            Reporter: Robert Kanter
            Assignee: Robert Kanter
            Priority: Blocker


{{mapred.lib.TotalPartitioner}} 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.TotalPartitioner}} is now a subclass of {{mapreduce.lib.TotalPartitioner}},
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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