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https://issues.apache.org/jira/browse/HBASE-4050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Baranau updated HBASE-4050:
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Attachment: HBASE-4050-8_1.patch
Tried to sketch what I suggested so that it is easier to follow. Haven't added
implementations in hadoop1/2-compat modules of the interfaces I added to
hadoop-compat, but they should be pretty much clear: they will be just
wrappers/proxies on top of hadoop.metrics2 classes.
bq. you would be forced to create whole wrapper classes around every class.
Yeah.. That is what I meant by
bq. The only fear is that by going with lower-level tools shims we might end up
having more of these shim classes/interfaces
Not sure how many of them will be needed, i.e. can't say how much bad it is. I
believe we'll need just several (Elliott's patch uses just 2) and their
interfaces are very small.
Anyhow, I will be completely OK if you turn down my suggestion. Just wanted to
share thoughts in which I saw some benefits (though there are cons as well)
> 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-4050-8_1.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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