[mapreduce] Switch most metrics to counters #2487
Merged
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With the following exceptions:
mapreduce.job.elapsed_time
mapreduce.job.map.task.elapsed_time
(made non-default in config)mapreduce.job.reduce.task.elapsed_time
(made non-default in config)Also, removed
mapreduce.job.map.task.progress
andmapreduce.job.reduce.task.progress
.We have to ping @kky once this PR is merged and part of a nightly/pre-release package so that he can update the default screenboard accordingly.