ERROR SparkUncaughtExceptionHandler: Uncaught exception in thread

ERROR SparkUncaughtExceptionHandler: Uncaught exception in thread 

Thread[appclient-registration-retry-thread,5,main] java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTa

报这个错的时候，你看看conf下面的spark-env.sh下面的master设置的是啥。把conf下面的setMaster改成这个配置即可。