I have a question about the contract in the org.apache.hadoop.mapred .OutputCollector interface. If it matters, let us say we are talking about Hadoop-1.0.0. In my map or reduce method, after it calls output.collect(key,value), is it allowed to mutate (side effect) either the key or the value?
If the answer is "it depends on the OutputFormat", then what is the answer for the more prominent ones, such as SequenceFileFormat and TextOutputFormat? Thanks, Mike
