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
，
原文：http://www.cnblogs.com/Khaleesi-yu/p/7419940.html