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https://issues.apache.org/jira/browse/HADOOP-10408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13933936#comment-13933936
]
Arpit Agarwal commented on HADOOP-10408:
----------------------------------------
Occasionally the test will fail with the following exception.
{code}
java.lang.AssertionError: expected:<0> but was:<2>
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.failNotEquals(Assert.java:647)
at org.junit.Assert.assertEquals(Assert.java:128)
at org.junit.Assert.assertEquals(Assert.java:472)
at org.junit.Assert.assertEquals(Assert.java:456)
at
org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl.testMultiThreadedPublish(TestMetricsSystemImpl.java:232)
{code}
At other times the exception looks as follows:
{code}
testMultiThreadedPublish(org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl)
Time elapsed: 0.468 sec <<< FAILURE!
java.lang.AssertionError: Metric not collected!
Passed
Passed
Passed
Passed
Passed
Passed
Passed
Passed
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:233)
{code}
Log message showing dropped events:
{code}
2014-03-12 21:08:17,236 WARN impl.MetricsSinkAdapter
(MetricsSinkAdapter.java:putMetricsImmediate(107)) - Collector has a full queue
and can't consume the given metrics.
2014-03-12 21:08:17,237 WARN impl.MetricsSinkAdapter
(MetricsSinkAdapter.java:putMetricsImmediate(107)) - Collector has a full queue
and can't consume the given metrics.
{code}
> TestMetricsSystemImpl fails occasionally
> ----------------------------------------
>
> Key: HADOOP-10408
> URL: https://issues.apache.org/jira/browse/HADOOP-10408
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Arpit Agarwal
>
> {{TestMetricsSystemImpl#testMultiThreadedPublish}} fails occasionally due to
> dropped events. Exception details in comment below.
> Running the test in a loop on an Ubuntu VM results in a failure after ~20
> iterations, however it repros almost daily in our automated test runs.
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