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https://issues.apache.org/jira/browse/HADOOP-9939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760985#comment-13760985
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Steve Loughran commented on HADOOP-9939:
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At a first glance I'm not sure that a single exception handler for the whole of
hadoop makes sense -and if it did, you'd have to justify why it was only
applied to one error in one individual class. Some specific auth failure
handler seems a lot cleaner than just log/book-keep handling, as you may want
to do more sophisticated actions on such an event.
Before worrying about that, my real question is more fundamental: *why not just
use log4j for this?*
You can set up L4J to have different appenders, including machine readable ones
(we have a JSON logger, there's the remote logging for chainsaw, etc). I think
you could define a handler that does what you want simply by adding the
relevant (custom) log4j appenders/handlers and configuring your log4j
properties.
What may be useful here is to have a specific logger for auth problems,
ugi.AUTH_FAILURE, which you'd then configure in Log4J for these specific
problems. Have a look at how we did this in {{Configuration}} for deprecation
messages as an example.
> Custom Processing for Errors
> ----------------------------
>
> Key: HADOOP-9939
> URL: https://issues.apache.org/jira/browse/HADOOP-9939
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Benoy Antony
> Assignee: Benoy Antony
> Priority: Minor
> Attachments: hadoop-9939.patch
>
> Original Estimate: 20h
> Remaining Estimate: 20h
>
> We have a use case where we want to display different error message and take
> some bookkeeping actions when there is authentication failure in Hadoop.
> There could be other error cases where we want to associate custom actions
> message.
> The work is define a framework to attach custom error processors as part of
> exception handling . Use that framework to display custom error message for
> authentication failures.
> Please review and let me know your comments or alternatives.
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