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https://issues.apache.org/jira/browse/HBASE-4050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13417808#comment-13417808
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Elliott Clark commented on HBASE-4050:
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# I would like that, except I think that grouping things together all under an
hbase node in jmx is nice. Since hadoop too the top one. That leaves us with
sharing the metrics system name. So all of the contexts will have to be well
named so that it's pretty evident which daemon they came from.
# Sure. That would make it easier to remove if we ever get all the methods
that we need on the hadoop metrics registry.
# But MetricMutableGaugeLong and MetricMutableCounterLong will never implement
our interfaces so you would be forced to create whole wrapper classes around
every class. I think it would be better if sources just implemented
specialized methods for interacting with known MetricMutable's. Then you get
all the speed and it abstracts the actual metrics from any code in hbase-server
# I was going to handle this by having ServiceLoader find a factory
implementation that creates an implementation of the source needed.
# As far as moving SourceImpl into hbase-hadoop-compat. It's not really
possible because it needs to implement interfaces that come from hadoop. And
those interfaces refer to classes that have changed.
> Update HBase metrics framework to metrics2 framework
> ----------------------------------------------------
>
> Key: HBASE-4050
> URL: https://issues.apache.org/jira/browse/HBASE-4050
> Project: HBase
> Issue Type: New Feature
> Components: metrics
> Affects Versions: 0.90.4
> Environment: Java 6
> Reporter: Eric Yang
> Assignee: Elliott Clark
> Priority: Critical
> Fix For: 0.96.0
>
> Attachments: 4050-metrics-v2.patch, 4050-metrics-v3.patch,
> HBASE-4050-0.patch, HBASE-4050-1.patch, HBASE-4050-2.patch,
> HBASE-4050-3.patch, HBASE-4050-5.patch, HBASE-4050-6.patch,
> HBASE-4050-7.patch, HBASE-4050-8.patch, HBASE-4050.patch
>
>
> Metrics Framework has been marked deprecated in Hadoop 0.20.203+ and 0.22+,
> and it might get removed in future Hadoop release. Hence, HBase needs to
> revise the dependency of MetricsContext to use Metrics2 framework.
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