Posted On: Mar 02, 2020
The Counters in the Hadoop MapReduce provides a way to measure the number of operations that occur in the MapReduce job. It is really useful in diagnosing the problem and gathering statistics about the MapReduce job. Counters are defined either by the MapReduce framework or the applications. Two types of Counters are the Built-In counters and User-Defined counters. Each counter in the Hadoop has along for the value and is named by an Enum.
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