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https://issues.apache.org/jira/browse/MAPREDUCE-3038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13108083#comment-13108083
]
Jeffrey Naisbitt commented on MAPREDUCE-3038:
---------------------------------------------
It looks to me like Router.java is using reflection incorrectly and not
checking whether the method was inherited. It's manually throwing that
exception if the method is not found in that class.
> job history server not starting because conf() missing HsController
> -------------------------------------------------------------------
>
> Key: MAPREDUCE-3038
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3038
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Thomas Graves
> Assignee: Thomas Graves
> Priority: Blocker
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-3038.java
>
>
> Exception starting history server.
> Sep 19, 2011 6:51:53 PM com.google.inject.MessageProcessor visit
> INFO: An exception was caught and reported. Message:
> org.apache.hadoop.yarn.webapp.WebAppException: conf() not found in class
> org.apache.hadoop.mapreduce.v2.hs.webapp.HsController
>
> org.apache.hadoop.yarn.webapp.WebAppException: conf() not found in class
> org.apache.hadoop.mapreduce.v2.hs.webapp.HsController
> at org.apache.hadoop.yarn.webapp.Router.addController(Router.java:107)
> at org.apache.hadoop.yarn.webapp.Router.add(Router.java:83)
> at org.apache.hadoop.yarn.webapp.WebApp.route(WebApp.java:140)
> at org.apache.hadoop.yarn.webapp.WebApp.route(WebApp.java:146)
> at
> org.apache.hadoop.mapreduce.v2.hs.webapp.HsWebApp.setup(HsWebApp.java:42)
> at org.apache.hadoop.yarn.webapp.WebApp.configureServlets(WebApp.java:121)
> at
> com.google.inject.servlet.ServletModule.configure(ServletModule.java:45)
> at com.google.inject.AbstractModule.configure(AbstractModule.java:59)
> at
> com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
> at com.google.inject.spi.Elements.getElements(Elements.java:101)
> at com.google.inject.InjectorShell$Builder.build(InjectorShell.java:135)
> at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:102)
> at com.google.inject.Guice.createInjector(Guice.java:92)
> at com.google.inject.Guice.createInjector(Guice.java:69)
> at com.google.inject.Guice.createInjector(Guice.java:59)
> at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:166)
> at
> org.apache.hadoop.mapreduce.v2.hs.HistoryClientService.initializeWebApp(HistoryClientService.java:138)
> at
> org.apache.hadoop.mapreduce.v2.hs.HistoryClientService.start(HistoryClientService.java:109)
> at
> org.apache.hadoop.yarn.service.CompositeService.start(CompositeService.java:68)
> at
> org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.main(JobHistoryServer.java:83)
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