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https://issues.apache.org/jira/browse/YARN-6202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953948#comment-15953948
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Yufei Gu commented on YARN-6202:
--------------------------------
It won't hide code bugs since the unit tests won't pass if AsyncDispatcher
crashed. People who use AsyncDispatcher assume it crash on exceptions. Hiding
this is more dangerous by making it false by default.
> Configuration item Dispatcher.DISPATCHER_EXIT_ON_ERROR_KEY is disregarded
> -------------------------------------------------------------------------
>
> Key: YARN-6202
> URL: https://issues.apache.org/jira/browse/YARN-6202
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager, resourcemanager
> Affects Versions: 2.9.0, 3.0.0-alpha2
> Reporter: Yufei Gu
> Assignee: Yufei Gu
> Attachments: YARN-6202.001.patch, YARN-6202.002.patch
>
>
> Dispatcher.DISPATCHER_EXIT_ON_ERROR_KEY (yarn.dispatcher.exit-on-error)
> always be true no matter what value in configuration files. This misleads
> users. Two solutions:
> # Remove the configuration item and provide a method to allow
> {{exitOnDispatchException}}/{{shouldExitOnError}} to be false to enable
> related unit tests. There is no need for false value in a real daemon since
> daemons should crash if its dispatcher quit.
> # Make it default true instead of false, so that we don't need to hard code
> it to be true in RM and NM, it is still configurable, and also provide method
> to enable related unit tests.
> Other than that, the code around it needs to refactor. {{public static
> final}} for a variable of interface isn't necessary, and YARN related
> configure item should be in class YarnConfiguration.
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