[HADOOP-597] transmission errors to the reduce will cause map output to be considered lost

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.7.1
• Assignee: Owen O'Malley
• Reporter: Owen O'Malley
• Created: 11/Oct/06 16:56
• Updated: 11/Oct/06 21:09
• Resolved: 11/Oct/06 19:45

Description

When the mapOutput servlet gets an IOException from reading the map output file, it correctly declares the map output lost. However, an IOException writing to the socket should NOT cause the map output to be declared lost. Unfortunately, the current implementation always declares the map output lost. When the map output is lost, the map is re-run on a different computer.