Spark执行程序登录YARN

Question

我正在Cloudera集群上以YARN客户端模式启动分布式Spark应用程序.过了一段时间,我在Cloudera Manager上看到了一些错误.一些执行器断开连接,系统地发生这种情况.我想调试该问题,但YARN没有报告内部异常.

Exception from container-launch with container ID: container_1417503665765_0193_01_000003 and exit code: 1
ExitCodeException exitCode=1: 
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:538)
    at org.apache.hadoop.util.Shell.run(Shell.java:455)
    at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:702)
    at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:196)
    at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:299)
    at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:81)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

如何查看异常的堆栈跟踪？似乎YARN仅报告应用程序异常退出.有没有办法在YARN配置中查看spark executor日志？

Answer 1

检查 NodeManager 的yarn.nodemanager.log-dir属性。这是Spark执行器容器运行时的日志位置。

请注意，当应用程序完成时，NodeManager 可能会删除文件（日志聚合）。查看此文档了解详细信息。http://hortonworks.com/blog/simplifying-user-logs-management-and-access-in-yarn/