[MAPREDUCE-7166] map-only job should ignore node lost event when task is already succeeded

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.5, 3.0.0, 3.1.1, 2.8.5, 2.7.7, 2.9.2
• Fix Version/s: 3.3.0
• Component/s: mrv2
• Target Version/s: 3.3.0
• Hadoop Flags: Reviewed
• Assignee: Lorin Lee
• Reporter: Zhaohui Xin
• Created: 28/Nov/18 11:16
• Updated: 20/Dec/18 01:40
• Resolved: 20/Dec/18 01:10

Description

When node lost, all mappers on this node will be rescheduled, but it's unnecessary for succeeded map only task because map only job has no reducer, and map output has been written to HDFS when it become succeeded, so we can ignore this node lost event.