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https://issues.apache.org/jira/browse/HDFS-15100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17010694#comment-17010694
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Íñigo Goiri commented on HDFS-15100:
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Can you show the output of the trace before and after?
I personally prefer single line messages for known exceptions.
> RBF: Print stacktrace when DFSRouter fails to fetch/parse JMX output from
> NameNode
> ----------------------------------------------------------------------------------
>
> Key: HDFS-15100
> URL: https://issues.apache.org/jira/browse/HDFS-15100
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: rbf
> Reporter: Akira Ajisaka
> Assignee: Akira Ajisaka
> Priority: Major
> Labels: supportability
>
> When DFSRouter fails to fetch or parse JMX output from NameNode, it prints
> only the error message. Therefore we had to modify the source code to print
> the stacktrace of the exception to find the root cause.
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