[jira] [Created] (MAPREDUCE-4565) Backport MR-2855 to branch-1: ResourceBundle lookup during counter name resolution takes a lot of time

["Karthik Kambatla (JIRA)" <ji...@apache.org>]

Karthik Kambatla created MAPREDUCE-4565:
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             Summary: Backport MR-2855 to branch-1: ResourceBundle lookup during counter name resolution takes a lot of time
                 Key: MAPREDUCE-4565
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4565
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 0.23.0
            Reporter: Karthik Kambatla
            Assignee: Siddharth Seth
             Fix For: 0.23.2


Loading a job status page in trunk takes a lot of time, and it seems like most of the time is spent resolving counter names. Looking through the JDK source, ResourceBundle.getBundle(String) ends up calling getClassContext() which is not very efficient. I think if we pass our own classloader manually it will be faster. In Counters.incrAllCounters, we may also be able to avoid setting the counter name if one is already set.

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