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https://issues.apache.org/jira/browse/HBASE-6514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447137#comment-13447137
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Elliott Clark commented on HBASE-6514:
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Yes the code committed will fix the log spam
(https://github.com/apache/hbase/commit/dd2c09a790dd5a1c0236cc9e511523c731325a76).
The code I was thinking about was in HBASE-6211. That issue was committed
earlier that made it so that histograms were actually used and exported through
the metrics system. However the log spam remained because base classes were
seeing some instances of histograms before the super classes were able to
register as being responsible.
The patch in this issue should make it so that MetricsHistogram's and
ExactCounterMetric are correctly taken care of assuming that an
org.apache.hadoop.hbase.MetricsMBeanBase is used to export them. For trunk the
best thing will be to just finish moving everything to metrics2. It has a
better system for creating our own metrics classes.
> unknown metrics type:
> org.apache.hadoop.hbase.metrics.histogram.MetricsHistogram
> --------------------------------------------------------------------------------
>
> Key: HBASE-6514
> URL: https://issues.apache.org/jira/browse/HBASE-6514
> Project: HBase
> Issue Type: Bug
> Components: test
> Affects Versions: 0.92.2, 0.94.0
> Environment: MacOS 10.8
> Oracle JDK 1.7
> Reporter: Archimedes Trajano
> Assignee: Elliott Clark
> Fix For: 0.92.2, 0.96.0, 0.94.2
>
> Attachments: FrameworkTest.java, HBASE-6514-94-0.patch,
> HBASE-6514-trunk-0.patch
>
>
> When trying to run a unit test that just starts up and shutdown the server
> the following errors occur in System.out
> 01:10:59,874 ERROR MetricsUtil:116 - unknown metrics type:
> org.apache.hadoop.hbase.metrics.histogram.MetricsHistogram
> 01:10:59,874 ERROR MetricsUtil:116 - unknown metrics type:
> org.apache.hadoop.hbase.metrics.histogram.MetricsHistogram
> 01:10:59,875 ERROR MetricsUtil:116 - unknown metrics type:
> org.apache.hadoop.hbase.metrics.histogram.MetricsHistogram
> 01:10:59,875 ERROR MetricsUtil:116 - unknown metrics type:
> org.apache.hadoop.hbase.metrics.histogram.MetricsHistogram
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