Github user vanzin commented on the issue:

    https://github.com/apache/spark/pull/19103
  
    BTW Oozie can also disable the HDFS provider 
(`spark.yarn.security.credentials.hadoopfs.enabled=false`, I think). But it 
would be nice if Spark was able to do that by itself is the current UGI does 
not have a TGT (or, alternatively, some way to disable all of the credential 
providers with a single setting). But that's for a separate PR.
    
    This one looks ok but it really needs to be opened against master instead.


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