纱线容器故障时产生火花

Question

供参考：我通过在hadoop / share / hadoop / common中添加Netty 4.1.17解决了此问题

无论我尝试运行哪种jar（包括来自https://spark.apache.org/docs/latest/running-on-yarn.html的示例），在Yarn上运行Spark时，我都会不断收到有关容器故障的错误消息。我在命令提示符下收到此错误：

Diagnostics: Exception from container-launch.
Container id: container_1530118456145_0001_02_000001
Exit code: 1
Stack trace: ExitCodeException exitCode=1:
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:585)
    at org.apache.hadoop.util.Shell.run(Shell.java:482)
    at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:776)
    at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:212)
    at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:302)
    at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:82)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

查看日志时，我发现此错误：

Exception in thread "main" java.lang.NoSuchMethodError:io.netty.buffer.PooledByteBufAllocator.metric()Lio/netty/buffer/PooledByteBufAllocatorMetric;
    at org.apache.spark.network.util.NettyMemoryMetrics.registerMetrics(NettyMemoryMetrics.java:80)
    at org.apache.spark.network.util.NettyMemoryMetrics.<init>(NettyMemoryMetrics.java:76)
    at org.apache.spark.network.client.TransportClientFactory.<init>(TransportClientFactory.java:109)
    at org.apache.spark.network.TransportContext.createClientFactory(TransportContext.java:99)
    at org.apache.spark.rpc.netty.NettyRpcEnv.<init>(NettyRpcEnv.scala:71)
    at org.apache.spark.rpc.netty.NettyRpcEnvFactory.create(NettyRpcEnv.scala:461)
    at org.apache.spark.rpc.RpcEnv$.create(RpcEnv.scala:57)
    at org.apache.spark.deploy.yarn.ApplicationMaster.runExecutorLauncher(ApplicationMaster.scala:530)
    at org.apache.spark.deploy.yarn.ApplicationMaster.org$apache$spark$deploy$yarn$ApplicationMaster$$runImpl(ApplicationMaster.scala:347)
    at org.apache.spark.deploy.yarn.ApplicationMaster$$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$5.run(ApplicationMaster.scala:815)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1758)
    at org.apache.spark.deploy.yarn.ApplicationMaster.doAsUser(ApplicationMaster.scala:814)
    at org.apache.spark.deploy.yarn.ApplicationMaster.run(ApplicationMaster.scala:259)
    at org.apache.spark.deploy.yarn.ApplicationMaster$.main(ApplicationMaster.scala:839)
    at org.apache.spark.deploy.yarn.ExecutorLauncher$.main(ApplicationMaster.scala:869)
    at org.apache.spark.deploy.yarn.ExecutorLauncher.main(ApplicationMaster.scala)

知道为什么会这样吗？它在根据本教程设置的伪分布式集群上运行：https : //wiki.apache.org/hadoop/Hadoop2OnWindows。Spark在本地运行良好，并且由于该jar是随Spark提供的，我怀疑这是jar中的问题。（无论如何，我在另一个jar中添加了Netty依赖项，但仍然出现相同的错误）。

我的spark-defaults.conf中唯一设置的是spark.yarn.jars，它指向一个hdfs目录，在该目录中我上传了所有Spark的jar。io.netty.buffer.PooledByteBufAllocator包含在这些jar中。

Spark 2.3.1，Hadoop 2.7.6

Answer 1

我有完全一样的问题。以前，我使用Hadoop 2.6.5和兼容的spark版本，一切正常。当我切换到Hadoop 2.7.6时，出现了问题。不知道是什么原因，但是我将其复制到netty.4.1.17.Final jar文件到hadoop库文件夹，然后问题消失了。