MR-279: Performance improvement in running Uber MapTasks
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Key: MAPREDUCE-2787
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2787
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mrv2
Reporter: Ahmed Radwan
Assignee: Ahmed Radwan
The runUberMapTasks() in org.apache.hadoop.mapred.UberTask obtains the local
fileSystem and local job configuration for every task attempt. This will have
a negative performance impact.
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