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Posted to mapreduce-dev@hadoop.apache.org by "Maxim (JIRA)" <ji...@apache.org> on 2009/11/06 18:12:32 UTC
[jira] Created: (MAPREDUCE-1194)
mapred.reduce.slowstart.completed.maps allows values more than 1.0 and less
than 0.0
mapred.reduce.slowstart.completed.maps allows values more than 1.0 and less than 0.0
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Key: MAPREDUCE-1194
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1194
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.1
Reporter: Maxim
Priority: Minor
When run with value less than 0.0 (e.g. -1.0) works similar to 0.0, but when value is more than 1.0 (e.g. 50.0) reducers don't start at all. Is there a reason why such values are allowed? I understand that this is clear from the description that parameter is fraction but some people may forget and confuse it with percents and as result have problems. Why not throw an error in this case?
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