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Posted to mapreduce-dev@hadoop.apache.org by "Hong Tang (JIRA)" <ji...@apache.org> on 2009/10/26 23:24:59 UTC

[jira] Created: (MAPREDUCE-1156) Caching localized counter names in mapred.Counters

Caching localized counter names in mapred.Counters
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                 Key: MAPREDUCE-1156
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1156
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
            Reporter: Hong Tang


Using YourKit profiling mumak, we found that MissingResourceException was thrown and caught 1.6 million times in Counters.Group.localize for several hundred of jobs. The resource bundle look up and costly exception processing can be easily avoided if we have a global cache of localized counter names.

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