[jira] [Commented] (MAPREDUCE-3632) Need better error message on the Web UI when NM can't find the container logs instead of NPEno

["Ravi Gummadi (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181089#comment-13181089 ] 

Ravi Gummadi commented on MAPREDUCE-3632:
-----------------------------------------

Here are the NPE details:


java.lang.NullPointerException
        at
org.apache.hadoop.yarn.server.nodemanager.webapp.ContainerLogsPage$ContainersLogsBlock.printLogs(ContainerLogsPage.java:278)
        at
org.apache.hadoop.yarn.server.nodemanager.webapp.ContainerLogsPage$ContainersLogsBlock.render(ContainerLogsPage.java:164)
        at org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:64)
        at org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:74)
        at org.apache.hadoop.yarn.webapp.View.render(View.java:233)
        at org.apache.hadoop.yarn.webapp.view.HtmlPage$Page.subView(HtmlPage.java:47)
        at org.apache.hadoop.yarn.webapp.hamlet.HamletImpl$EImp._v(HamletImpl.java:117)
        at org.apache.hadoop.yarn.webapp.hamlet.Hamlet$TD._(Hamlet.java:843)
        at org.apache.hadoop.yarn.webapp.view.TwoColumnLayout.render(TwoColumnLayout.java:54)
        at org.apache.hadoop.yarn.webapp.view.HtmlPage.render(HtmlPage.java:80)
        at org.apache.hadoop.yarn.webapp.Controller.render(Controller.java:210)
        at org.apache.hadoop.yarn.server.nodemanager.webapp.NMController.logs(NMController.java:104)
        ... 33 more

                
> Need better error message on the Web UI when NM can't find the container logs instead of NPEno
> ----------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3632
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3632
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 0.23.0
>            Reporter: Ravi Gummadi
>            Assignee: Ravi Gummadi
>             Fix For: 0.23.1
>
>
> If for some reason NM could not find container logs, then an NPE is seen while trying to access from web UI. Instead an error message should be displayed.

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