DistCp standby state error

January 14, 2021

Let’s say you need to run the distcp command:

hadoop distcp -Dmapreduce.map.memory.mb=1000 -m 200 hdfs://node1:8020/your/folder1 hdfs://node1:8020/your/folder2

But as a result, you get an error like this:

ERROR tools.DistCp: Invalid arguments:
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby. Visit https://s.apache.org/sbnn-error

One of the reasons for such an error may be that node1:8020 is not an active node.

Recheck the hostname and run the command again.