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From "Sean Mackrory (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15442) ITestS3AMetrics.testMetricsRegister can't know metrics source's name
Date Wed, 02 May 2018 23:01:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461710#comment-16461710

Sean Mackrory commented on HADOOP-15442:

Attached a patch that fixes the issue for my local test runs: fixes the naming to only append
a number once, regardless, and then remove the assertion that can't always be true. Not sure
of what could reasonably replace that, but like I said it's not adding much (if any) value

> 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
>            Priority: Major
>         Attachments: HADOOP-15442.001.patch
> 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
> * 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
> 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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