From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: Re: hydra python2-numpy-1.9.1 failure
Date: Wed, 10 Dec 2014 23:19:03 -0500
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	(Federico Beffa's message of "Wed, 10 Dec 2014 22:19:52 +0100")
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To: Federico Beffa <beffa@ieee.org>
Cc: Guix-devel <guix-devel@gnu.org>

Federico Beffa <beffa@ieee.org> writes:

> On Wed, Dec 10, 2014 at 7:33 PM, Mark H Weaver <mhw@netris.org> wrote:
>> It's not uncommon for some tests to fail occasionally in certain
>> packages.  Reasons I've seen include: timeouts set too short, race
>> conditions, randomized tests that fail for some values, and dependencies
>> on the kernel version and/or configuration.  We've had to debug these
>> problems on a case-by-case basis.  Sometimes we've disabled the
>> unreliable tests, or even disabled the entire test suite.
>
> Thanks for the input! It looks like on hydra the failure is
> reproducible. I would therefore tend to discard randomized tests. Do
> you happen to know the timeout for tests? The test fails after
> 17seconds which is not very long.

Any such timeout would be built in to the test suite of that package.
IIRC, the only relevant timeout that guix-daemon imposes is this: if the
build is silent (no output) for 1 hour, the build is aborted.

> Now that you mention race conditions, I remember having a hard time
> with parallel builds in ATLAS; and numpy makes use of it. I may try
> adding '#:parallel-tests? #f'.

It's worth a try.  We currently need that in over 20 packages.

      Mark