Spark java.lang.NoClassDefFoundError: org / apache / spark / SparkConf

<dependency>

<groupId>org.apache.spark</groupId>

<artifactId>spark-core_2.10</artifactId>

<version>${spark.version}</version>

<!--<scope>provided</scope>--> </dependency>

Todos org.apache.spark下面的应用都需要comentan el alcance o el cambio proporcionado para compilar