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https://issues.apache.org/jira/browse/HADOOP-10468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13962525#comment-13962525
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Haohui Mai commented on HADOOP-10468:
-------------------------------------
The problem is that the configuration value is not picked up in the unit test.
Investigation shows that the {{MetricsConfig}} class converts the prefix into
lowercase string, internally the prefix is used to look up the configuration
value. The mismatch of letter cases causes the system fails to pick up the
configuration values.
> TestMetricsSystemImpl.testMultiThreadedPublish fails intermediately
> -------------------------------------------------------------------
>
> Key: HADOOP-10468
> URL: https://issues.apache.org/jira/browse/HADOOP-10468
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HADOOP-10468.000.patch
>
>
> {{TestMetricsSystemImpl.testMultiThreadedPublish}} can fail intermediately
> due to the insufficient size of the sink queue:
> {code}
> 2014-04-06 21:34:55,269 WARN impl.MetricsSinkAdapter
> (MetricsSinkAdapter.java:putMetricsImmediate(107)) - Collector has a full
> queue and can't consume the given metrics.
> 2014-04-06 21:34:55,270 WARN impl.MetricsSinkAdapter
> (MetricsSinkAdapter.java:putMetricsImmediate(107)) - Collector has a full
> queue and can't consume the given metrics.
> 2014-04-06 21:34:55,271 WARN impl.MetricsSinkAdapter
> (MetricsSinkAdapter.java:putMetricsImmediate(107)) - Collector has a full
> queue and can't consume the given metrics.
> {code}
> The unit test should increase the default queue size to avoid intermediate
> failure.
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