[jira] [Commented] (MESOS-6825) Increase default allocation_interval for tests

["Anand Mazumdar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-6825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15767510#comment-15767510 ] 

Anand Mazumdar commented on MESOS-6825:
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> This means that if the host running the tests is slow, a test case might receive a resource offer that it doesn't receive when running on a faster host.

Did you mean that if the "task" in question in the test finishes? This shouldn't happen otherwise if the "used" resources on the agent did not change (task is active)

> Increase default allocation_interval for tests
> ----------------------------------------------
>
>                 Key: MESOS-6825
>                 URL: https://issues.apache.org/jira/browse/MESOS-6825
>             Project: Mesos
>          Issue Type: Improvement
>          Components: tests
>            Reporter: Neil Conway
>              Labels: mesosphere
>
> The default {{allocation_interval}} is 1 second. This means that if the host running the tests is slow, a test case might receive a resource offer that it doesn't receive when running on a faster host. We could workaround this by explicitly using {{WillRepeatedly(Return())}}, but that is a bit kludgy and obscures the intent of the test.
> One way to avoid this would be to pause the clock by default in tests (MESOS-4101). That would be a quite involved change, however.
> Instead, we could consider raising the default {{allocation_interval}} to a large value, such as 1 minute or longer. This would significantly reduce the chance of host performance causing test flakiness. Moreover, it would help to highlight tests that rely on real-time batch allocations for correctness: generally tests should avoid doing this (because it causes test slowness). They should instead pause the clock and then advance it by {{allocation_interval}}.



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