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https://issues.apache.org/jira/browse/YARN-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13448283#comment-13448283
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Vinod Kumar Vavilapalli commented on YARN-42:
---------------------------------------------
This should be a harmless exception, and the current error message is clear
enough.
Don't have a problem avoiding this unnecessary NPE, +1.
Will resubmit to Jenkins and check this in once it's blessed.
> Node Manager throws NPE on startup
> ----------------------------------
>
> Key: YARN-42
> URL: https://issues.apache.org/jira/browse/YARN-42
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 2.1.0-alpha
> Reporter: Devaraj K
> Assignee: Devaraj K
> Attachments: MAPREDUCE-4254.patch
>
>
> NM throws NPE on startup if it doesn't have persmission's on nm local dir's
> {code:xml}
> 2012-05-14 16:32:13,468 FATAL
> org.apache.hadoop.yarn.server.nodemanager.NodeManager: Error starting
> NodeManager
> org.apache.hadoop.yarn.YarnException: Failed to initialize LocalizationService
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.init(ResourceLocalizationService.java:202)
> at
> org.apache.hadoop.yarn.service.CompositeService.init(CompositeService.java:58)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.init(ContainerManagerImpl.java:183)
> at
> org.apache.hadoop.yarn.service.CompositeService.init(CompositeService.java:58)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.init(NodeManager.java:166)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:268)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:284)
> Caused by: java.io.IOException: mkdir of /mrv2/tmp/nm-local-dir/usercache
> failed
> at org.apache.hadoop.fs.FileSystem.primitiveMkdir(FileSystem.java:907)
> at
> org.apache.hadoop.fs.DelegateToFileSystem.mkdir(DelegateToFileSystem.java:143)
> at org.apache.hadoop.fs.FilterFs.mkdir(FilterFs.java:189)
> at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:706)
> at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:703)
> at
> org.apache.hadoop.fs.FileContext$FSLinkResolver.resolve(FileContext.java:2325)
> at org.apache.hadoop.fs.FileContext.mkdir(FileContext.java:703)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.init(ResourceLocalizationService.java:188)
> ... 6 more
> 2012-05-14 16:32:13,472 INFO org.apache.hadoop.yarn.service.CompositeService:
> Error stopping
> org.apache.hadoop.yarn.server.nodemanager.containermanager.loghandler.NonAggregatingLogHandler
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.loghandler.NonAggregatingLogHandler.stop(NonAggregatingLogHandler.java:82)
> at
> org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:99)
> at
> org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:89)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.stop(ContainerManagerImpl.java:266)
> at
> org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:99)
> at
> org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:89)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.stop(NodeManager.java:182)
> at
> org.apache.hadoop.yarn.service.CompositeService$CompositeServiceShutdownHook.run(CompositeService.java:122)
> at
> org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)
> {code}
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