Harsh J created MAPREDUCE-4931:
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Summary: Add user-APIs for classpath precedence control
Key: MAPREDUCE-4931
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4931
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: client
Affects Versions: 1.0.0
Reporter: Harsh J
Priority: Minor
The feature config from MAPREDUCE-1938 of allowing tasks to start with
user-classes-first is fairly popular and can use its own API hooks in
Job/JobConf classes, making it easier to discover and use it rather than
continuing to keep it as an advanced param.
I propose to add two APIs to Job/JobConf:
{code}
void setUserClassesTakesPrecedence(boolean)
boolean userClassesTakesPrecedence()
{code}
Both of which, depending on their branch of commit, set the property
{{mapreduce.user.classpath.first}} (1.x) or
{{mapreduce.job.user.classpath.first}} (trunk, 2.x and if needed, in 0.23.x).
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