Hello what do you mean by "knox user is set as livy superuser"? With this setup I end with an error saying that user knox is not allowed to impersonate the proxyUser given in the JSON payload. However knox is properly configured for other usages (WbHDFS, etc.) and Livy is able to impersonate properly. Do you have any clue on this error? ... View more

I can confirm that I had the same problem on HDP 2.6.3. Like suggested, using the fully qualified path (hdfs://<cluster>/path) makes it work. ... View more