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https://issues.apache.org/jira/browse/HDFS-5556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13832005#comment-13832005
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Andrew Wang commented on HDFS-5556:
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I missed this before, but are we sure we want to add new stats to
NameNodeMXBean rather than FSNamesystemMBean? It's a public stable interface,
so modifications here are not backwards compatible.
I'd also like to see a test a la TestNameNodeMetrics verifying that the new NN
metrics show up. It should be straightfoward to insert a few more checks in an
existing caching test or check method. We can wait on CachePoolStats tests
until they're hooked up.
> add some more NameNode cache statistics, cache pool stats
> ---------------------------------------------------------
>
> Key: HDFS-5556
> URL: https://issues.apache.org/jira/browse/HDFS-5556
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: 3.0.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-5556.001.patch, HDFS-5556.002.patch
>
>
> Add some more NameNode cache statistics and also cache pool statistics.
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