ClassNotFoundException: org.apache.spark.examples.SparkPi

bin/spark-submit \
> --class org.apache.spark.examples.SparkPi \
> --master yarn \
> --deploy-mode client \
> ./examples/jars/spark-examples_2.11-2.1.1.jar \
> 100

出现以下问题
java.lang.ClassNotFoundException: org.apache.spark.examples.SparkPi
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.spark.util.Utils $.classForName(Utils.scala:229) at org.apache.spark.deploy.SparkSubmit$.org $apache$spark $deploy$SparkSubmit$ $runMain(SparkSubmit.scala:700) at org.apache.spark.deploy.SparkSubmit$.doRunMain $1(SparkSubmit.scala:187) at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:212)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:126)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

目前不知道怎么解决 呃呃呃