Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/21216
I'm not so familiar with federated HDFS, but is it transparent to the
downside applications like Spark, or Spark should know all the configured NNs?
If it is transparent, then I think the token acquisition mechanism should also
be transparent to Spark, Spark doesn't need to know all the configured NNs.
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