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https://issues.apache.org/jira/browse/HDFS-6747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14073916#comment-14073916
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Allen Wittenauer commented on HDFS-6747:
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If people are using the Web UI to solve those problems, that's bad because it
means that we have an education problem. Most of the pro Hadoop admins
(including myself) configure the system such that problems such as these are
handled proactively via monitoring and metrics collection. Putting it on the
NN UI is really just a "yup, my phone went off for a valid reason" kind of
thing.
Also, as [~esteban] points out, the *length* of the GC is more important that
it *happened*. In modern JREs configured with modern GC engines, they do
collection all the time.
> Display the most recent GC info on NN webUI
> -------------------------------------------
>
> Key: HDFS-6747
> URL: https://issues.apache.org/jira/browse/HDFS-6747
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ming Ma
>
> It will be handy if the recent GC information is available on NN webUI.
> admins don't need to dig out GC logs.
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