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In a multiple application environment (MapReduce, Tez, others), it can appear that some application get stuck (blocked, deadlocked), it is likely your YARN / MAPREDUCE settings need to be reviewed. First of all, setup YARN queue, check the value of mapreduce.job.reduce.slowstart.completedmaps (interesting to change it to 0.9) and enable preemption.

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Last update:
‎04-23-2016 04:08 PM
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