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From "Joshua McKenzie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10659) Windows CassCI: Fail on timed-out tests
Date Mon, 09 Nov 2015 17:17:11 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14996924#comment-14996924
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Joshua McKenzie commented on CASSANDRA-10659:
---------------------------------------------

Sounds reasonable.

> Windows CassCI: Fail on timed-out tests
> ---------------------------------------
>
>                 Key: CASSANDRA-10659
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10659
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jim Witschey
>            Assignee: Jim Witschey
>
> On our Windows CassCI environments, it looks like some dtests are prone to hanging, e.g.:
> https://cassci.datastax.com/view/Dev/view/josh-mckenzie/job/josh-mckenzie-10641_windows-dtest_win32/1/
> http://cassci.datastax.com/view/cassandra-2.2/job/cassandra-2.2_dtest_win32/131/
> http://cassci.datastax.com/view/cassandra-2.2/job/cassandra-2.2_dtest_win32/129/
> http://cassci.datastax.com/view/cassandra-2.2/job/cassandra-2.2_dtest_win32/128/
> http://cassci.datastax.com/view/cassandra-2.2/job/cassandra-2.2_dtest_win32/126/
> http://cassci.datastax.com/view/cassandra-2.2/job/cassandra-2.2_dtest_win32/125/
> Ideally these tests wouldn't hang, but regardless, we should figure out a way to make
them fail, rather than timing out Jenkins and botching the rest of the test run.
> The built-in [{{nosetests}} {{multiprocess}} plugin|http://nose.readthedocs.org/en/latest/plugins/multiprocess.html]
would solve this problem for us -- we could run the tests with {{nosetests --processes=1 --process-timeout=X}}
and it would stop the test and fail if the test took too long. However, it's broken on Windows.
I've filed [a quick issue on the {{nose}} GitHub|https://github.com/nose-devs/nose/issues/966],
but in the meantime, we should figure out how to avoid this.
> Possible solutions:
> # [~philipthompson] had a script that would shell out to {{nosetests}} for each test
and kill that process if it took too long. If I understand correctly, that script is broken,
or assumes things that are no longer true. We can revamp it if we want.
> # We could make a patch for {{nose}} to fix the {{multiprocess}} plugin.
> # We could hack in some of {{multiprocessing}}'s functionality into the {{dtest}} suite
itself.
> 3. may be the best workaround for this problem -- our timeouts aren't caused just when
a tests runs long, but when Jenkins doesn't get any output on stdout from a hanging test.
We may be able to monitor stdout from a second process and fail the test before Jenkins would
time out.
> Pinging [~JoshuaMcKenzie] as this is a Windows issue.



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