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https://issues.apache.org/jira/browse/HBASE-18409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188390#comment-16188390
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Josh Elser commented on HBASE-18409:
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Thanks [~qwerty2.0]! Rebased patch looks like it did the trick
* You have one whitespace nit to clean up (we can probably fix that on commit,
honestly).
* I don't think the test-failures are your fault. I think the unit-tests timed
out which caused these to get reported as "failures" when it's more that they
simply didn't get run.
I have a note to follow up on the timed out tests on HBASE-18891. I'll try to
circle back around here when I get to the bottom of that.
> Migrate Client Metrics from codahale to hbase-metrics
> -----------------------------------------------------
>
> Key: HBASE-18409
> URL: https://issues.apache.org/jira/browse/HBASE-18409
> Project: HBase
> Issue Type: Improvement
> Components: Client, java, metrics
> Affects Versions: 3.0.0
> Reporter: Ronald Macmaster
> Labels: newbie
> Fix For: 3.0.0
>
> Attachments:
> 0001-HBASE-18409-MetricsConnection-client-metrics-migration.patch,
> 0002-HBASE-18409-MetricsConnection-client-metrics-migrati.patch,
> 0003-HBASE-18409-MetricsConnection-client-metrics-migration.patch,
> 0004-HBASE-18409-MetricsConnection-client-metrics-migration.patch
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> Currently, the metrics for hbase-client are tailored for reporting via a
> client-side JMX server.
> The MetricsConnection handles the metrics management and reporting via the
> metrics platform from codahale.
> This approach worked well for hbase-1.3.1 when the metrics platform was still
> relatively young, but it could be improved by using the new
> hbase-metrics-api.
> Now that we have an actual hbase-metrics-api that master, regionserver,
> zookeeper, and other daemons use, it would be good to also allow the client
> to leverage the metrics-api.
> Then, the client could also report its metrics via Hadoop's metrics2 if
> desired or through another platform that utilizes the hbase-metrics-api.
> If left alone, client metrics will continue to be only barely visible through
> a client-side JMX server.
> The migration to the new metrics-api could be done by simply changing the
> Metrics data types from codahale types to hbase-metrics types without
> changing the metrics signatures of MetricsConnection unless completely
> necessary.
> The codahale MetricsRegistry would also have to be exchanged for a
> hbase-metrics MetricsRegistry.
> I found this to be a necessary change after attempting to implement my own
> Reporter to use within the MetricsConnection class.
> I was attempting to create a HadoopMetrics2Reporter that extends the codahale
> ScheduledReporter and reports the MetricsConnection metrics to Hadoop's
> metrics2 system.
> The already existing infrastructure in the hbase-metrics and
> hbase-metrics-api projects could be easily leveraged for a cleaner solution.
> If completed successfully, users could instead access their client-side
> metrics through the hbase-metrics-api.
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