How to solve a DisallowedDatanodeException


Error Scenario: Datanode denied communication with namenode: We usually get this error message while adding a data node to an existing HDFS cluster or at the time of cluster setup. Below is the snapshot of this errorĀ message from log file in data node. [crayon-5bf30802a8e33748114900/] Root Cause: This error message is […]

Datanode denied communication with namenode