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Re: Hydra job gnu:hurd-master:qemu_tests.build on x86_64-linux, build 25

From: Ludovic Courtès
Subject: Re: Hydra job gnu:hurd-master:qemu_tests.build on x86_64-linux, build 2550872: Success
Date: Thu, 10 May 2012 00:49:47 +0200
User-agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.93 (gnu/linux)

Hi Thomas!

Thomas Schwinge <thomas@schwinge.name> skribis:

> On Tue, 8 May 2012 17:30:13 +0200, Hydra Build Daemon <e.dolstra@tudelft.nl> 
> wrote:
>> This is to let you know that Hydra build 2550872 of job 
>> gnu:hurd-master:qemu_tests.build has changed from 'Failed with non-zero exit 
>> code' to 'Success'.
>> Complete build information can be found on this page: 
>> http://hydra.nixos.org/build/2550872
> With the information from the page, how do I tell what was the change
> that fixed the »/host/xchg: Translator died« issue?  Or, on
> <http://hydra.nixos.org/build/2549940> what was the change that
> introduced the issue?

Under “Changes” on this page, you see what exactly changed in the “build
inputs” between the last successful build and this one.  So this should
tell you what change introduced the failure.

>From <http://hydra.nixos.org/job/gnu/hurd-master/qemu_tests.build>, if
you can go to the next build, which succeeded:
<http://hydra.nixos.org/build/2550872>.  This time, you see the same
info under “Changes”, plus those changes that led to the “fix”.

That’s the theory.

In practice though, /host/xchg in the VM runs SMBFS, which talks to the
host.  I suspect something non-determinstic is going on here, such as a
timeout being reached under high load on the build machines.  :-/


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