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https://issues.apache.org/jira/browse/HADOOP-9844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14329604#comment-14329604
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Steve Loughran commented on HADOOP-9844:
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Jason, NPE is the reference example of why to use {{toString()}} over
{{getMessage()}}; it relies on {{Throwable.toString()}} to include the base
classname alongside any message (here, null)
My patch as written in 2013 will catch it.
> NPE when trying to create an error message response of RPC
> ----------------------------------------------------------
>
> Key: HADOOP-9844
> URL: https://issues.apache.org/jira/browse/HADOOP-9844
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.1.1-beta, 2.6.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Attachments: HADOOP-9844-001.patch
>
>
> I'm seeing an NPE which is raised when the server is trying to create an
> error response to send back to the caller and there is no error text.
> The root cause is probably somewhere in SASL, but sending something back to
> the caller would seem preferable to NPE-ing server-side.
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