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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3970) Counters written to the job history cannot be recovered back
Date Tue, 19 Aug 2008 09:45:44 GMT
Counters written to the job history cannot be recovered back
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                 Key: HADOOP-3970
                 URL: https://issues.apache.org/jira/browse/HADOOP-3970
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
            Reporter: Amar Kamat


Counters that are written to the history are stringified using {{Counters.getCompactString()}}.
The format in which this api converts the counter into a string is _groupname.countername:value_.
The problem is that the groupname and the countername can contain '.' and hence recovering
the counter back becomes difficult. Since jobhistory can be used for various purposes, reconstructing
the counter object back might be useful. One such usecase is HADOOP-3245. There should be
some way to recover the counter object back from the string representation and also to keep
the stringified version readable.

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