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Follow these two steps: 1) Change the replication factor from hadoop file system. Make sure to login to the user for which you are getting health issue of under-replicated blocks: su - hdfs hadoop fs -setrep -R 1 / or su - oozie hadoop fs -setrep -R 1 / etc... 2) Change Warning and Critical value for "Under-replicated Block Monitoring Thresholds" ...

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