org.apache.spark.SparkException: Could not find CoarseGrainedScheduler or it has been stopped.
        at org.apache.spark.rpc.netty.Dispatcher.postMessage(Dispatcher.scala:163)
        at org.apache.spark.rpc.netty.Dispatcher.postOneWayMessage(Dispatcher.scala:133)
        at org.apache.spark.rpc.netty.NettyRpcEnv.send(NettyRpcEnv.scala:192)
        at org.apache.spark.rpc.netty.NettyRpcEndpointRef.send(NettyRpcEnv.scala:516)
        at org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend.reviveOffers(CoarseGrainedSchedulerBackend.scala:356)
        at org.apache.spark.scheduler.TaskSchedulerImpl.executorLost(TaskSchedulerImpl.scala:494)
        at org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend$DriverEndpoint.disableExecutor(CoarseGrainedSchedulerBackend.scala:301)
        at org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnDriverEndpoint$$anonfun$onDisconnected$1.apply(YarnSchedulerBackend.scala:121)
        at org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnDriverEndpoint$$anonfun$onDisconnected$1.apply(YarnSchedulerBackend.scala:120)
        at scala.Option.foreach(Option.scala:236)
        at org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnDriverEndpoint.onDisconnected(YarnSchedulerBackend.scala:120)
        at org.apache.spark.rpc.netty.Inbox$$anonfun$process$1.apply$mcV$sp(Inbox.scala:142)
        at org.apache.spark.rpc.netty.Inbox.safelyCall(Inbox.scala:204)
        at org.apache.spark.rpc.netty.Inbox.process(Inbox.scala:100)
        at org.apache.spark.rpc.netty.Dispatcher$MessageLoop.run(Dispatcher.scala:217)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
18/10/14 22:23:26 ERROR netty.Inbox: Ignoring error
org.apache.spark.SparkException: Could not find CoarseGrainedScheduler or it has been stopped.
        at org.apache.spark.rpc.netty.Dispatcher.postMessage(Dispatcher.scala:163)
        at org.apache.spark.rpc.netty.Dispatcher.postOneWayMessage(Dispatcher.scala:133)
        at org.apache.spark.rpc.netty.NettyRpcEnv.send(NettyRpcEnv.scala:192)
        at org.apache.spark.rpc.netty.NettyRpcEndpointRef.send(NettyRpcEnv.scala:516)
        at org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend.reviveOffers(CoarseGrainedSchedulerBackend.scala:356)
        at org.apache.spark.scheduler.TaskSchedulerImpl.executorLost(TaskSchedulerImpl.scala:494)
        at org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend$DriverEndpoint.disableExecutor(CoarseGrainedSchedulerBackend.scala:301)
        at org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnDriverEndpoint$$anonfun$onDisconnected$1.apply(YarnSchedulerBackend.scala:121)
        at org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnDriverEndpoint$$anonfun$onDisconnected$1.apply(YarnSchedulerBackend.scala:120)
        at scala.Option.foreach(Option.scala:236)
        at org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnDriverEndpoint.onDisconnected(YarnSchedulerBackend.scala:120)
        at org.apache.spark.rpc.netty.Inbox$$anonfun$process$1.apply$mcV$sp(Inbox.scala:142)
        at org.apache.spark.rpc.netty.Inbox.safelyCall(Inbox.scala:204)
        at org.apache.spark.rpc.netty.Inbox.process(Inbox.scala:100)
        at org.apache.spark.rpc.netty.Dispatcher$MessageLoop.run(Dispatcher.scala:217)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

......

java.util.concurrent.RejectedExecutionException: Task scala.concurrent.impl.CallbackRunnable@708dfce7 rejected from java.util.concurrent.ThreadPoolExecutor@346be0ef[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 224]
        at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2048)
        at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:821)
        at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1372)
        at scala.concurrent.impl.ExecutionContextImpl.execute(ExecutionContextImpl.scala:122)
        at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40)
        at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248)
        at scala.concurrent.Promise$class.complete(Promise.scala:55)
        at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153)
        at scala.concurrent.Future$$anonfun$recover$1.apply(Future.scala:324)
        at scala.concurrent.Future$$anonfun$recover$1.apply(Future.scala:324)
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
        at org.spark-project.guava.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:293)
        at scala.concurrent.impl.ExecutionContextImpl$$anon$1.execute(ExecutionContextImpl.scala:133)
        at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40)
        at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248)
        at scala.concurrent.Promise$class.complete(Promise.scala:55)
        at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153)
        at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:235)
        at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:235)
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
        at scala.concurrent.Future$InternalCallbackExecutor$Batch$$anonfun$run$1.processBatch$1(Future.scala:643)
        at scala.concurrent.Future$InternalCallbackExecutor$Batch$$anonfun$run$1.apply$mcV$sp(Future.scala:658)
        at scala.concurrent.Future$InternalCallbackExecutor$Batch$$anonfun$run$1.apply(Future.scala:635)
        at scala.concurrent.Future$InternalCallbackExecutor$Batch$$anonfun$run$1.apply(Future.scala:635)
        at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)
        at scala.concurrent.Future$InternalCallbackExecutor$Batch.run(Future.scala:634)
        at scala.concurrent.Future$InternalCallbackExecutor$.scala$concurrent$Future$InternalCallbackExecutor$$unbatchedExecute(Future.scala:694)
        at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:685)
        at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40)
        at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248)
        at scala.concurrent.Promise$class.tryFailure(Promise.scala:112)
        at scala.concurrent.impl.Promise$DefaultPromise.tryFailure(Promise.scala:153)
        at org.apache.spark.rpc.netty.NettyRpcEnv.org$apache$spark$rpc$netty$NettyRpcEnv$$onFailure$1(NettyRpcEnv.scala:208)
        at org.apache.spark.rpc.netty.NettyRpcEnv$$anonfun$2.apply(NettyRpcEnv.scala:230)
        at org.apache.spark.rpc.netty.NettyRpcEnv$$anonfun$2.apply(NettyRpcEnv.scala:230)
        at org.apache.spark.rpc.netty.RpcOutboxMessage.onFailure(Outbox.scala:71)
        at org.apache.spark.network.client.TransportResponseHandler.failOutstandingRequests(TransportResponseHandler.java:110)
        at org.apache.spark.network.client.TransportResponseHandler.channelUnregistered(TransportResponseHandler.java:124)
        at org.apache.spark.network.server.TransportChannelHandler.channelUnregistered(TransportChannelHandler.java:94)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelUnregistered(AbstractChannelHandlerContext.java:158)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelUnregistered(AbstractChannelHandlerContext.java:144)
        at io.netty.channel.ChannelInboundHandlerAdapter.channelUnregistered(ChannelInboundHandlerAdapter.java:53)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelUnregistered(AbstractChannelHandlerContext.java:158)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelUnregistered(AbstractChannelHandlerContext.java:144)
        at io.netty.channel.ChannelInboundHandlerAdapter.channelUnregistered(ChannelInboundHandlerAdapter.java:53)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelUnregistered(AbstractChannelHandlerContext.java:158)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelUnregistered(AbstractChannelHandlerContext.java:144)
        at io.netty.channel.ChannelInboundHandlerAdapter.channelUnregistered(ChannelInboundHandlerAdapter.java:53)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelUnregistered(AbstractChannelHandlerContext.java:158)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelUnregistered(AbstractChannelHandlerContext.java:144)
        at io.netty.channel.DefaultChannelPipeline.fireChannelUnregistered(DefaultChannelPipeline.java:739)
        at io.netty.channel.AbstractChannel$AbstractUnsafe$8.run(AbstractChannel.java:659)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:328)
        at io.netty.util.concurrent.SingleThreadEventExecutor.confirmShutdown(SingleThreadEventExecutor.java:627)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:362)

Solution:

1. Add the configuration spark-submit ... --conf spark.dynamicAllocation.enabled=false when submitting the code
2. You can also set SparkConf in the code: conf.set("spark.dynamicAllocation.enabled","false")

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