Is the DistCp NameNode path the active HDFS NameNode or the active ResourceManager?

[#1]

When specifying fully-qualified paths to copy data between two HA clusters with DistCp, e.g:

hdfs://nn1:8020/foo/bar

Is the address of nn1 really referring to the where the active HDFS NameNode is, or is it looking for the active ResourceManager?

Thanks!

[#2 · Accepted solution]

It refers to active Name Node. For distcp you are providing 2 paths, source and target files/directories, both on HDFS of respective clusters. With some more settings you can refer to NN name service, meaning that you don't need to care which NN is active.