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From "Sean Mackrory (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-15442) ITestS3AMetrics.testMetricsRegister can't know metrics source's name
Date Wed, 02 May 2018 22:19:00 GMT
Sean Mackrory created HADOOP-15442:
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             Summary: ITestS3AMetrics.testMetricsRegister can't know metrics source's name
                 Key: HADOOP-15442
                 URL: https://issues.apache.org/jira/browse/HADOOP-15442
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Sean Mackrory
            Assignee: Sean Mackrory


I've seen this test fail a bunch lately - mainly when the tests are all run (i.e. not individually)
but not in parallel, it seems. If you dump out the sources when it fails, you see:

* The sources are numbered in the hundreds, so it's very unlikely that this actually gets
the first one.
* The sources are numbered twice. There was logic to have the first one not be numbered, but
that got messed up and now all sources are numbered twice, but the first one is only number
once.

We could just remove the bad assertion, but then we're only testing the registry and not anything
else about the way metrics flow all the way through the whole system. Worth it to fix the
failing test, I think - knowing the source gets registered doesn't add a whole lot of value
toward end-to-end metrics testing.



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