[Buildbot-devel] exception slave lost

Ben Hearsum bhearsum at mozilla.com
Tue Nov 12 15:27:01 UTC 2013

Because Buildbot requires a constant connection between master and slave, many things can cause this. I've seen this happen for at least the following reasons:
* Temporary network connection loss or slowness.
* Load so high on master or slave that keepalive can't happen

While it won't help fix the root cause, you may want to consider putting this patch on your master(s), which will set RETRY for builds like this: https://github.com/buildbot/buildbot/pull/937
On Tue, Nov 12, 2013 at 02:07:20PM +0100, Johannes Ring wrote:
> Hi,
> We often have this problem on our buildbot: "exception slave lost". On
> the buildslave I see this error:
> remoteFailed: [Failure instance: Traceback (failure with no frames):
> <class 'twisted.internet.error.ConnectionLost'>: Connection to the
> other side was lost in a non-clean fashion.
> ]
> What can be done to prevent this?
> Thanks,
> Johannes
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