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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6177) Yarn client should exit with an informative error message if an incompatible Jersey library is used at client
Date Tue, 14 Feb 2017 03:36:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-6177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864972#comment-15864972

Weiwei Yang commented on YARN-6177:

Thanks [~gtCarrera9] for the quick review,

bq. are we catching every throwable and swallow them if timelineServiceBestEffort is set to

that's definitely not my intention! thanks for pointing this out, I am going to correct this
and upload a new patch shortly.

bq. Meanwhile, we can improve the output message if we hit NoClassDefFoundError to hint users
to disable timeline service?

I am proposing the error message like following
"Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/jersey/api/client/config/ClientConfig.
It appears that the timeline client failed to initiate because an incompatible dependency
in classpath. If timeline service is optional to this client, try to work around by setting
yarn.timeline-service.client.best-effort to true."
Use timeline best effort flag seems a better option for me than disabling it, are you suggesting
we should still ask users to disable it?

> Yarn client should exit with an informative error message if an incompatible Jersey library
is used at client
> -------------------------------------------------------------------------------------------------------------
>                 Key: YARN-6177
>                 URL: https://issues.apache.org/jira/browse/YARN-6177
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.8.0, 3.0.0-alpha2
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>         Attachments: spark2-job-output-after-besteffort.out, spark2-job-output-after.out,
spark2-job-output-before.out, YARN-6177.01.patch, YARN-6177.02.patch, YARN-6177.03.patch
> Per discussion in YARN-5271, lets provide an error message to suggest user to disable
timeline service instead of disabling for them.

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