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From "Zoltan Haindrich (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19971) TestRuntimeStats.testCleanup() is flaky
Date Thu, 28 Jun 2018 13:24:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16526299#comment-16526299
] 

Zoltan Haindrich commented on HIVE-19971:
-----------------------------------------

I was looking for if someone have opened a ticket so far to fix this...and yes :D
I wanted to fix this also....
[~pvary] I also don't like the way this test works - but I haven't seen a better way to do
it...
there were already 2 testruns in which this test didn't fail...and since this will reduce
flakiness I will commit it right away...
+1


> TestRuntimeStats.testCleanup() is flaky
> ---------------------------------------
>
>                 Key: HIVE-19971
>                 URL: https://issues.apache.org/jira/browse/HIVE-19971
>             Project: Hive
>          Issue Type: Task
>            Reporter: Andrew Sherman
>            Assignee: Andrew Sherman
>            Priority: Major
>         Attachments: HIVE-19971.1.patch, HIVE-19971.2.patch, HIVE-19971.3.patch, HIVE-19971.4.patch
>
>
> This test is timing dependent and sometimes fails. [You can see that it sometimes fails
in otherwise clean runs|https://issues.apache.org/jira/issues/?jql=text%20~%20%22TestRuntimeStats%22].  The
test inserts a stat, sleeps for 2 seconds, inserts another stat, then deletes stats that are
older than 1 second. The test asserts that exactly one stat is deleted. If the deletion is
slow for some reason (perhaps a GC?) then 2 stats will be deleted and the test will fail.
The trouble is that the 1 second window is too small to work consistently.



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