我正在运行一个 hadoop 作业，它卡在"映射 0% 减少 0%"。更具体地说，映射器都处于"正在启动"状态，似乎从未真正开始执行。
我尝试查看日志，但除了一些弃用消息外，没有真正看到任何其他内容。我不确定要寻找什么，想知道是否有人有任何建议？
编辑 1：
标准日志：
26, 2013 1:15:32 AM com.google.inject.servlet.InternalServletModule$BackwardsCompatibleServletContextProvider get
WARNING: You are attempting to use a deprecated API (specifically, attempting to @Inject ServletContext inside an eagerly created singleton. While we allow this for backwards compatibility, be warned that this MAY have unexpected behavior if you have more than one injector (with ServletModule) running in the same JVM. Please consult the Guice documentation at http://code.google.com/p/google-guice/wiki/Servlets for more information.
Dec 26, 2013 1:15:33 AM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
INFO: Registering org.apache.hadoop.mapreduce.v2.app.webapp.JAXBContextResolver as a provider class
Dec 26, 2013 1:15:33 AM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
INFO: Registering org.apache.hadoop.yarn.webapp.GenericExceptionHandler as a provider class
Dec 26, 2013 1:15:33 AM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
INFO: Registering org.apache.hadoop.mapreduce.v2.app.webapp.AMWebServices as a root resource class
Dec 26, 2013 1:15:33 AM com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
INFO: Initiating Jersey application, version 'Jersey: 1.9 09/02/2011 11:17 AM'
Dec 26, 2013 1:15:33 AM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory getComponentProvider
INFO: Binding org.apache.hadoop.mapreduce.v2.app.webapp.JAXBContextResolver to GuiceManagedComponentProvider with the scope "Singleton"
Dec 26, 2013 1:15:33 AM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory getComponentProvider
INFO: Binding org.apache.hadoop.yarn.webapp.GenericExceptionHandler to GuiceManagedComponentProvider with the scope "Singleton"
Dec 26, 2013 1:15:33 AM com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory getComponentProvider
INFO: Binding org.apache.hadoop.mapreduce.v2.app.webapp.AMWebServices to GuiceManagedComponentProvider with the scope "PerRequest
通常查看资源管理器的日志会有所帮助。 在其日志中查找任何异常。 如果不存在异常，请查看 NodeManager 日志以查找任何异常。 在此处告知这些可能的异常。