Re: iotests 041 intermittent failure (netbsd)

[Philippe Mathieu-Daudé]

On 4/9/21 1:37 PM, Kevin Wolf wrote:
> Am 09.04.2021 um 12:31 hat Daniel P. Berrangé geschrieben:
>> On Fri, Apr 09, 2021 at 12:22:26PM +0200, Philippe Mathieu-Daudé wrote:
>>> On 4/9/21 11:43 AM, Peter Maydell wrote:
>>>> Just hit this (presumably intermittent) 041 failure running
>>>> the build-and-test on the tests/vm netbsd setup. Does it look
>>>> familiar to anybody?
>>>
>>> This one is known as the mysterious failure:
>>> https://www.mail-archive.com/qemu-block@nongnu.org/msg73321.html
>>
>> If the test has been flakey with no confirmed fix since Sept 2020,
>> then it is well overdue to be switched to disabled by default, at
>> least on the platforms it is known to be flakey on.
> 
> Why do you think this is the same problem? It is a completely different
> error message, happening in a different test function. The problems
> reported in September were fixed in the next version of the pull
> request.

Oops my bad, I thought this was the same, sorry.

> What Peter is reporting here is probably unrelated to NetBSD, but to
> overloaded test hosts. QMPTestCase.pause_wait() uses a timeout of
> 3 seconds until it decides that the job probably has just failed to
> pause at all, so that the test case wouldn't hang indefinitely on
> failure.
> 
> We can increase the timeout, but of course, that doesn't guarantee that
> we'll never hit it again on very slow test hosts.
> 
> Kevin
>