Simplify parameter passing to Application Master from Client. SImplify approach
to pass info such appId, ClusterTimestamp and failcount required by App Master.
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Key: MAPREDUCE-3055
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3055
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 0.23.0
Reporter: Hitesh Shah
Priority: Minor
Fix For: 0.23.0
The Application master needs the application attempt id to register with the
Applications Manager. To create an appAttemptId object, the appId object(needs
cluster timestamp and app id) and failCount are needed.
Currently, all clients need to pass in the appId, cluster timestamp and fail
count to the app master for the required objects to be constructed.
We could look at simplifying this by providing either placeholders that would
have values replaced by the app master launcher or setting it into the
environment ( although that requires a set of whitelisted env vars that can
only be set by the yarn framework ).
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