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From Vinod Kumar Vavilapalli <vino...@apache.org>
Subject Re: Policy on adding timeouts to tests
Date Thu, 17 Apr 2014 04:24:11 GMT
The other advantage of timeout is early failure - earlier than the uber 10 min timeout that
seems to exist in the build files. Usually the test-writer has a general idea of how long
the test is supposed to run and if that doesn't happen, we can fail early. Clearly, this involves
choosing a reasonable timeout so that the test can pass on local machines, different OSes
and/or in VMs.

+Vinod

On Apr 15, 2014, at 11:37 AM, Chris Nauroth <cnauroth@hortonworks.com> wrote:

> +common-dev, hdfs-dev
> 
> My understanding of the current situation is that we had a period where we
> tried to enforce adding timeouts on all new tests in patches, but it caused
> trouble, and now we're back to not requiring it.  Jenkins test-patch isn't
> checking for it anymore.
> 
> I don't think patches are getting rejected for using timeouts though.
> 
> The difficulty is that execution time is quite sensitive to the build
> environment.  (Consider top-of-the-line server hardware used in build
> infrastructure vs. a dev running a VirtualBox VM with 1 dedicated CPU, 2 GB
> RAM and slow virtualized disk.)  When we were enforcing timeouts, it was
> quite common to see follow-up patches tuning up the timeout settings to
> make tests work reliably in a greater variety of environments.  At that
> point, the benefit of using the timeout becomes questionable, because now
> the fast machine is running with the longer timeout too.
> 
> Chris Nauroth
> Hortonworks
> http://hortonworks.com/
> 
> 
> 
> On Mon, Apr 14, 2014 at 9:41 AM, Karthik Kambatla <kasha@cloudera.com>wrote:
> 
>> Hi folks
>> 
>> Just wanted to check what our policy for adding timeouts to tests is. Do we
>> encourage/discourage using timeouts for tests? If we discourage using
>> timeouts for tests in general, are we okay with adding timeouts for a few
>> tests where we explicitly want the test to fail if it takes longer than a
>> particular amount of time?
>> 
>> Thanks
>> Karthik
>> 
> 
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