Replace Strings with Objects for representing the slaves in the JobTracker.
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Key: HADOOP-3343
URL: https://issues.apache.org/jira/browse/HADOOP-3343
Project: Hadoop Core
Issue Type: Improvement
Components: mapred
Reporter: Amar Kamat
Currently the JobTracker stores the trackername as a String. JobTracker relies
on a hack (string parsing) to deduce the hostname/port information from the
trackername. It would be better if the slaves/trackers are represented by an ID
and the ID provides certain APIs for getting this information. Something like
{code}
class TrackerId {
getHostname()
getPort()
toString()
readFrom()
write()
}
{code}
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