NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less

I have seen many answers related to this error, but all re-directing to scala versions etc. But I think my case is different. I have a remote spark master-worker cluster set up with version 2.10. I was able to verify it through http://master-ip:8080 listing all worker nodes From my application, I am trying to create SparkConf with Java 7 code. Following below is the code ``` sparkConf = new SparkConf(true) .set("spark.cassandra.connection.host", "localhost") .set("spark.cassandra.auth.username", "username") .set("spark.cassandra.auth.password", "pwd") .set("spark.master", "spark://master-ip:7077") .set("spark.app.name","Test App"); ``` Following are the maven dependencies i added ``` <dependency> <groupId>com.datastax.spark</groupId> <artifactId>spark-cassandra-connector_2.10</artifactId> <version>2.0.1</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-core_2.11</artifactId> <version>2.1.0</version> <exclusions> <exclusion> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> </exclusion> </exclusions> </dependency> ``` I get the below error ``` Caused by: java.lang.NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less; at org.apache.spark.util.Utils$.getSystemProperties(Utils.scala:1710) at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:73) at org.apache.spark.SparkConf.<init>(SparkConf.scala:68) ``` Spark Version from one of the worker nodes ``` ./spark-shell --version Welcome to ____ __ / __/__ ___ _____/ /__ _\ \/ _ \/ _ `/ __/ '_/ /___/ .__/\_,_/_/ /_/\_\ version 2.1.0 /_/ Using Scala version 2.11.8, Java HotSpot(TM) 64-Bit Server VM, 1.8.0_91 Branch Compiled by user jenkins on 2016-12-16T02:04:48Z Revision Url Type --help for more information. ```