question unknown host exception in Spark SQL context in Support Questions

question unknown host exception in Spark SQL context in Support Questions https://community.cloudera.com/t5/Support-Questions/unknown-host-exception-in-Spark-SQL-context/m-p/155906#M118328 <UL> <LI>client OS is RHEL 6.7</LI><LI>Our cluster is running HDP 2.4.2</LI><LI>Our cluster is configured with an HA namenode, </LI><LI>We're using Kerberos for authentication.</LI></UL>scala> val parquetFile = sqlContext.read.parquet("hdfs://clustername/folder/file")any idea whats the issue ???Error:java.lang.IllegalArgumentException: java.net.UnknownHostException: cluster name Fri, 16 Dec 2016 00:56:40 GMT garunkumar85 2016-12-16T00:56:40Z