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https://issues.apache.org/jira/browse/HDFS-2978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214975#comment-13214975
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Aaron T. Myers commented on HDFS-2978:
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bq. One of the things that was done in 0.23 (available in 1.0) was to add every
thing exposed in Namenode webUI to the JMX interfaces on the namenode. This
interface is accessible over http. I believe this information was added to NN
WebUI, post that. We should add it to JMX interfaces.
Cool, so you agree that this info is not currently present? Just making sure.
bq. One thing I notice with some of these Jiras is, Aaron you keep saying
metrics. Metrics to me is an interface where keep track of peg counts, rate
etc, for measurement purposes. The information such as dirs etc to me belongs
to management interface and that is where JMX interfaces come in. So we should
add this to the JMX interface. Also we need to enforce adding any info added to
NN web UI to the JMX interface.
You're right - I've been inaccurate when using the term "metrics" for this. My
apologies.
> The NameNode should expose name dir statuses via JMX
> ----------------------------------------------------
>
> Key: HDFS-2978
> URL: https://issues.apache.org/jira/browse/HDFS-2978
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
>
> We currently display this info on the NN web UI, so users who wish to monitor
> this must either do it manually or parse HTML. We should publish this
> information via JMX.
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