[jira] [Created] (MAPREDUCE-5531) Binary and source incompatibility in mapreduce.TaskID and mapreduce.TaskAttemptID between branch-1 and branch-2

["Robert Kanter (JIRA)" <ji...@apache.org>]

Robert Kanter created MAPREDUCE-5531:
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             Summary: Binary and source incompatibility in mapreduce.TaskID and mapreduce.TaskAttemptID between branch-1 and branch-2
                 Key: MAPREDUCE-5531
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5531
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv1, mrv2
    Affects Versions: 2.1.1-beta
            Reporter: Robert Kanter
            Assignee: Robert Kanter
            Priority: Blocker


{{mapreduce.TaskID}} in branch-1 has these two constructors:
{code:java}
public TaskID(JobID jobId, boolean isMap, int id)
public TaskID(String jtIdentifier, int jobId, boolean isMap, int id)
{code}
In branch-2, {{mapreduce.TaskID}} no longer has either of the above two constructors.  

Also, {{mapreduce.TaskAttemptID}} in branch-1 has this constructor:
{code:java}
public TaskAttemptID(String jtIdentifier, int jobId, boolean isMap, int taskId, int id)
{code}
In branch-2, {{mapreduce.TaskAttemptID}} no longer his this constructor.

It looks like these constructors were probably removed because the {{boolean isMap}} was replaced by an enum, {{TaskType}}.

This means that any code that tries to use any of those constructors will not be binary or source compatible (in fact, the missing {{TaskAttemptID}} constructor calls one of the missing {{TaskID}} constructors).

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