Spark shell超时

 WARN netty.NettyRpcEndpointRef: Error sending message [message = RemoveExecutor(1,Command exited with code 1)] in 1 attempts
org.apache.spark.rpc.RpcTimeoutException: Futures timed out after [120 seconds]. This timeout is controlled by spark.rpc.askTimeout
at org.apache.spark.rpc.RpcTimeout.org$apache$spark$rpc$RpcTimeout$$createRpcTimeoutException(RpcTimeout.scala:48)
at org.apache.spark.rpc.RpcTimeout$$anonfun$addMessageIfTimeout$1.applyOrElse(RpcTimeout.scala:63)
at org.apache.spark.rpc.RpcTimeout$$anonfun$addMessageIfTimeout$1.applyOrElse(RpcTimeout.scala:59)
at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:33)
at org.apache.spark.rpc.RpcTimeout.awaitResult(RpcTimeout.scala:76)
at org.apache.spark.rpc.RpcEndpointRef.askWithRetry(RpcEndpointRef.scala:101)
at org.apache.spark.rpc.RpcEndpointRef.askWithRetry(RpcEndpointRef.scala:77)
at org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend.removeExecutor(CoarseGrainedSchedulerBackend.scala:359)
at 

spark集群部署好之后，运行start-all.sh，可以成功运行，但是运行shell出错，显示超时

由于netty是spark通信框架，通信超时所以产生问题。

解决方法：1.ip6可能是一个可能原因，把：：1也就是ip6先注释掉试试（不行）                                 2.设置下超时时间（靠谱）：
SparkConf: conf.set("spark.rpc.askTimeout", "600s")
  spark-defaults.conf: spark.rpc.askTimeout 600s
spark-submit: --conf spark.rpc.askTimeout=600s

 

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