[ https://issues.apache.org/jira/browse/HADOOP-13018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15259832#comment-15259832 ] 

Steve Loughran commented on HADOOP-13018:
-----------------------------------------

lets do the specific one, as it catches anything related to compilation and signature changes. Reflection is something to preserve for emergencies, as not only is it hard to work with, it's hard to debug problems

> Make Kdiag check whether hadoop.token.files points to existent and valid files
> ------------------------------------------------------------------------------
>
>                 Key: HADOOP-13018
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13018
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 3.0.0
>            Reporter: Ravi Prakash
>            Assignee: Ravi Prakash
>         Attachments: HADOOP-13018.01.patch, HADOOP-13018.02.patch
>
>
> Steve proposed that KDiag should fail fast to help debug the case that hadoop.token.files points to a file not found. This JIRA is to affect that.



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