rangjiaheng created MAPREDUCE-6979:
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Summary: CLONE - MR task counters deserialized through RPC throws
OutOfBoundsException if Counter enum class version not match
Key: MAPREDUCE-6979
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6979
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mr-am, task
Affects Versions: 3.0.0-alpha4
Environment: NM1 TaskCounter.class old version;
NM2 TaskCounter.class new version (new Enumeration values appended);
Reporter: rangjiaheng
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.
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