[MAPREDUCE-5304] mapreduce.Job killTask/failTask/getTaskCompletionEvents methods have incompatible signature changes

• Type: Sub-task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.0.4-alpha
• Fix Version/s: 2.1.0-beta
• Target Version/s: 2.1.0-beta
• Hadoop Flags: Incompatible change, Reviewed
• Assignee: Karthik Kambatla
• Reporter: Alejandro Abdelnur
• Created: 05/Jun/13 18:23
• Updated: 03/Nov/14 18:05
• Resolved: 12/Jun/13 18:52

Description

Pointed out by zjshen in MAPREDUCE-4942.

In o.a.h.mapreduce.Job class, the following changed from Hadoop 1 to Hadoop 2.

boolean failTask(TaskAttemptID): Change in return type from void to boolean.
boolean killTask(TaskAttemptID): Change in return type from void to boolean.
TaskCompletionEvent[] getTaskCompletionEvents(int): Change in return type from org.apache.hadoop.mapred.TaskCompletionEvent[] to org.apache.hadoop.mapreduce.TaskCompletionEvent[].

Using same rational as in other JIRAs, we should fix this to ensure Hadoop 1 to Hadoop 2 source compatibility (taking 0.23.x releases as a casualty as there is not right way for everybody because we screwed up ). Flagging it as incompatible change because of 0.23.