Re: iotests 041 intermittent failure (netbsd)

[Kevin Wolf]

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.

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