问题描述：

21/05/31 16:34:25 ERROR ApplicationMaster: Uncaught exception: 
java.util.concurrent.TimeoutException: Futures timed out after [100000 milliseconds]
	at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:219)
	at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:223)
	at org.apache.spark.util.ThreadUtils$.awaitResult(ThreadUtils.scala:201)
	at org.apache.spark.deploy.yarn.ApplicationMaster.runDriver(ApplicationMaster.scala:498)
	at org.apache.spark.deploy.yarn.ApplicationMaster.org$apache$spark$deploy$yarn$ApplicationMaster$$runImpl(ApplicationMaster.scala:345)
	at org.apache.spark.deploy.yarn.ApplicationMaster$$anonfun$run$2.apply$mcV$sp(ApplicationMaster.scala:260)
	at org.apache.spark.deploy.yarn.ApplicationMaster$$anonfun$run$2.apply(ApplicationMaster.scala:260)
	at org.apache.spark.deploy.yarn.ApplicationMaster$$anonfun$run$2.apply(ApplicationMaster.scala:260)
	at org.apache.spark.deploy.yarn.ApplicationMaster$$anon$5.run(ApplicationMaster.scala:815)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
	at org.apache.spark.deploy.yarn.ApplicationMaster.doAsUser(ApplicationMaster.scala:814)
	at org.apache.spark.deploy.yarn.ApplicationMaster.run(ApplicationMaster.scala:259)
	at org.apache.spark.deploy.yarn.ApplicationMaster$.main(ApplicationMaster.scala:839)
	at org.apache.spark.deploy.yarn.ApplicationMaster.main(ApplicationMaster.scala)
21/05/31 16:34:25 INFO ApplicationMaster: Final app status: FAILED, exitCode: 13, (reason: Uncaught exception: java.util.concurrent.TimeoutException: Futures timed out after [100000 milliseconds])
21/05/31 16:34:25 INFO StreamingContext: Invoking stop(stopGracefully=false) from shutdown hook

解决方法：

1、打包的时候忘记注释，去掉下面代码里的master

val sparkSession = SparkSession
      .builder().master("local")
      .appName(this.getClass.getSimpleName.filter(!_.equals('$')))
      .config("spark.yarn.maxAppAttempts","1")
      .config("spark.default.parallelism","200")
      .config("spark.serializer","org.apache.spark.serializer.KryoSerializer")
      .getOrCreate()

2、如果上面的方法不起作用，则可以尝试做以下设置：

 --conf spark.yarn.am.waitTime=6000s
 --conf spark.sql.broadcastTimeout= 6000
 --conf spark.network.timeout=600