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Posted to hdfs-user@hadoop.apache.org by Jim Donofrio <do...@gmail.com> on 2012/08/14 15:47:30 UTC

do comparators need to be thread safe?

Do comparators set via JobConf.setOutputKeyComparator or 
JobConf.setOutputValueGroupingComparator and not through 
WritableComparator.define need to be thread safe?