Even i  get the same error today when i invoke spark-shell with the following command I dont find appropriate solution when i google. Pls provide me some suggestion spark-shell --master yarn --deploy-mode client I have spark-1.6 hadoop 2.6.0 cloudera quickstart 5.13   spark shows its on scala 2.10.5 & java1.8.0_211 I have installed scala 2.12.8 ... View more