https://community.cloudera.com/t5/Support-Questions/unknown-host-exception-in-Spark-SQL-context/m-p/155907#M118329 <P>your host name is set to "cluster name" which is incorrect. instead of the hdfs://clustername/folder/file" use hdfs://hostname/folder/file", update it with your hostname.</P> Fri, 16 Dec 2016 05:02:02 GMT sbomma 2016-12-16T05:02:02Z