@ARUN In Addition to above answers: 1. Can you please check if nodemanager state is healthy for 3rd node? Sometimes, because of disk failure/reserved disk nodemanegers goes into unhealthy state although nodemanager daemon is still running, jobs will not get scheduled on problematic node. 2. Most important thing is try to run hdfs balancer if data distribution is un-even across all the datanodes. 3. Below is the command to run hdfs balancer sudo -u hdfs hadoop balancer -threshold <threshold-value> Note - default threshold is 10, you can reduce it upto 1 depending on how close you want to balance your cluster. . Hope this information helps!
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