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what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

Answer Posted / Anesh Kumar

When a task fails, Hadoop reschedules it to run again on a different node. The specific behavior depends on the MapReduce job's configuration. For example, if a map task fails, the entire split is re-attempted, and for a reduce task, only the failed portion of the data is re-attempted.

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