I am trying to run a spark job via Talend tool. I am getting below error. Can anyone please suggest.     [INFO ]: org.apache.spark.deploy.yarn.Client - client token: N/A diagnostics: Application application_1607145350732_0015 failed 2 times due to AM Container for appattempt_1607145350732_0015_000002 exited with exitCode: 10 Failing this attempt.Diagnostics: [2020-12-06 15:49:09.302]Exception from container-launch. Container id: container_1607145350732_0015_02_000001 Exit code: 10 [2020-12-06 15:49:09.305]Container exited with a non-zero exit code 10. Error file: prelaunch.err. Last 4096 bytes of prelaunch.err : Last 4096 bytes of stderr : [2020-12-06 15:49:09.305]Container exited with a non-zero exit code 10. Error file: prelaunch.err. Last 4096 bytes of prelaunch.err : Last 4096 bytes of stderr : For more detailed output, check the application tracking page: http://localhost:8088/cluster/app/application_1607145350732_0015 Then click on links to logs of each attempt. . Failing the application. ApplicationMaster host: N/A ApplicationMaster RPC port: -1 queue: root.users.appsuser start time: 1607291334541 final status: FAILED tracking URL: http://localhost:8088/cluster/app/application_1607145350732_0015 user: appsuser [ERROR]: org.apache.spark.SparkContext - Error initializing SparkContext. org.apache.spark.SparkException: Yarn application has already ended! It might have been killed or unable to launch application master. at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.waitForApplication(YarnClientSchedulerBackend.scala:85) at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:62) at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:173) at org.apache.spark.SparkContext.<init>(SparkContext.scala:509) at org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:58) at talend_developement.sparkproduct_cld_step6__0_1.sparkPRODUCT_CLD_STEP6_.runJobInTOS(sparkPRODUCT_CLD_STEP6_.java:1387) at talend_developement.sparkproduct_cld_step6__0_1.sparkPRODUCT_CLD_STEP6_.main(sparkPRODUCT_CLD_STEP6_.java:1279) [INFO ]: org.spark_project.jetty.server.AbstractConnector - Stopped Spark@62551ff6{HTTP/1.1,[http/1.1]}{0.0.0.0:4040} [INFO ]: org.apache.spark.ui.SparkUI - Stopped Spark web UI at http://0.0.0.00:4040 [ERROR]: org.apache.spark.network.client.TransportClient - Failed to send RPC 6049494344693001682 to /0.0.0.168:42590: java.nio.channels.ClosedChannelException java.nio.channels.ClosedChannelException at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) [ERROR]: org.apache.spark.scheduler.cluster.YarnSchedulerBackend$YarnSchedulerEndpoint - Sending RequestExecutors(0,0,Map(),Set()) to AM was unsuccessful java.io.IOException: Failed to send RPC 6049494344693001682 to /0.0.00.000:42590: java.nio.channels.ClosedChannelException at org.apache.spark.network.client.TransportClient.lambda$sendRpc$2(TransportClient.java:237) at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:507) at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:481) at io.netty.util.concurrent.DefaultPromise.access$000(DefaultPromise.java:34) at io.netty.util.concurrent.DefaultPromise$1.run(DefaultPromise.java:431) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:399) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:446) at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131) at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144) at java.lang.Thread.run(Thread.java:748) Caused by: java.nio.channels.ClosedChannelException at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) [INFO ]: org.apache.spark.scheduler.cluster.SchedulerExtensionServices - Stopping SchedulerExtensionServices (serviceOption=None, services=List(), started=false) [ERROR]: org.apache.spark.util.Utils - Uncaught exception in thread main org.apache.spark.SparkException: Exception thrown in awaitResult: at org.apache.spark.util.ThreadUtils$.awaitResult(ThreadUtils.scala:205) at org.apache.spark.rpc.RpcTimeout.awaitResult(RpcTimeout.scala:75) at org.apache.spark.scheduler.cluster.CoarseGrainedSchedulerBackend.requestTotalExecutors(CoarseGrainedSchedulerBackend.scala:551) at org.apache.spark.scheduler.cluster.YarnSchedulerBackend.stop(YarnSchedulerBackend.scala:93) at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.stop(YarnClientSchedulerBackend.scala:151) at org.apache.spark.scheduler.TaskSchedulerImpl.stop(TaskSchedulerImpl.scala:517) at org.apache.spark.scheduler.DAGScheduler.stop(DAGScheduler.scala:1652) at org.apache.spark.SparkContext$$anonfun$stop$8.apply$mcV$sp(SparkContext.scala:1921) at org.apache.spark.util.Utils$.tryLogNonFatalError(Utils.scala:1317) at org.apache.spark.SparkContext.stop(SparkContext.scala:1920) at org.apache.spark.SparkContext.<init>(SparkContext.scala:587) at org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:58) at talend_developement.sparkproduct_cld_step6__0_1.sparkPRODUCT_CLD_STEP6_.runJobInTOS(sparkPRODUCT_CLD_STEP6_.java:1387) at talend_developement.sparkproduct_cld_step6__0_1.sparkPRODUCT_CLD_STEP6_.main(sparkPRODUCT_CLD_STEP6_.java:1279) Caused by: java.io.IOException: Failed to send RPC 6049494344693001682 to /0.0.00.000:42590: java.nio.channels.ClosedChannelException at org.apache.spark.network.client.TransportClient.lambda$sendRpc$2(TransportClient.java:237) at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:507) at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:481) at io.netty.util.concurrent.DefaultPromise.access$000(DefaultPromise.java:34) at io.netty.util.concurrent.DefaultPromise$1.run(DefaultPromise.java:431) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:399) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:446) at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131) at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144) at java.lang.Thread.run(Thread.java:748) Caused by: java.nio.channels.ClosedChannelException at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) [INFO ]: org.apache.spark.MapOutputTrackerMasterEndpoint - MapOutputTrackerMasterEndpoint stopped! ... 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