[MAPREDUCE-6978] MR task counters deserialized through RPC throws OutOfBoundsException if Counter enum class version not match

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.0.0-alpha4
• Component/s: mr-am, task

Environment

NM1 TaskCounter.class old version;
NM2 TaskCounter.class new version (new Enumeration values appended);

• Assignee: Unassigned
• Reporter: rangjiaheng
• Created: 09/Oct/17 17:10
• Updated: 10/Oct/17 14:45
• Resolved: 09/Oct/17 17:53

Description

Environment:
NM1 TaskCounter.class old version;
NM2 TaskCounter.class new version (new Enumeration values appended);

Result:
When an MR app's AM running on NM1, and it's containers on NM2; the containers on NM2 will all failed, AM cause OutOfBoundsException;

Reason:
When app running, containers will report their counters to AM through RPC, while the Container with new version TaskCounter.class will write more Counter values to RPC; however, the AM with old version TaskCounter.class which can not read them correctly from RPC.

Issue Links

• duplicates: MAPREDUCE-6922 MapReduce jobs may fail during rolling upgrade due to MAPREDUCE-6829