请尝试在同一--jars选项中提供所有jar（逗号分隔）：

Try to provide all your jars in the same --jars option (comma-separated) :

--jars yourFirstJar.jar,yourSecondJar.jar

一个更方便的开发解决方案是使用Maven Central的jar（以逗号分隔）：

A more convenient solution for development purpose would be to use the jars from maven central (comma-separated) :

--packages org.apache.spark:spark-streaming-kafka_2.10:1.4.1,com.datastax.spark:spark-cassandra-connector_2.10:1.4.1