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https://issues.apache.org/jira/browse/HADOOP-10062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14306493#comment-14306493
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Sangjin Lee commented on HADOOP-10062:
--------------------------------------
Thanks [~djp]!
> race condition in MetricsSystemImpl#publishMetricsNow that causes incorrect
> results
> -----------------------------------------------------------------------------------
>
> Key: HADOOP-10062
> URL: https://issues.apache.org/jira/browse/HADOOP-10062
> Project: Hadoop Common
> Issue Type: Bug
> Components: metrics
> Affects Versions: 3.0.0
> Environment: CentOS 6.4, Oracle JDK 1.6.0_31, JDK1.7.0_45
> Reporter: Shinichi Yamashita
> Assignee: Sangjin Lee
> Attachments: HADOOP-10062-failed.txt, HADOOP-10062-success.txt,
> HADOOP-10062.003.patch, HADOOP-10062.patch, HADOOP-10062.patch
>
>
> TestMetricsSystemInpl#testMultiThreadedPublish failed with "Metrics not
> collected"
> {code}
> Running org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl
> Tests run: 6, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 1.688 sec <<<
> FAILURE! - in org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl
> testMultiThreadedPublish(org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl)
> Time elapsed: 0.056 sec <<< FAILURE!
> java.lang.AssertionError: Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Passed
> at org.junit.Assert.fail(Assert.java:93)
> at org.junit.Assert.assertTrue(Assert.java:43)
> at
> org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl.testMultiThreadedPublish(TestMetricsSystemImpl.java:232)
> Results :
> Failed tests:
> TestMetricsSystemImpl.testMultiThreadedPublish:232 Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Metric not collected!
> Passed
> Tests run: 6, Failures: 1, Errors: 0, Skipped: 0
> {code}
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