How to access Hadoop counters values via API?

Question

In Hadoop we can increment counter in map/reduce task, it looks like this:

...
context.getCounter(MyCountersEnum.SomeCounter).increment(1);
...

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Answer 1

I just found the answer here.

You need a job object to access the counters:

Counters counters = job.getCounters();
Counter counter = counters.findCounter(MyCountersEnum.SomeCounter);
System.out.println(counter.getDisplayName() + ": " + counter.getValue());