[Buildbot-devel] twisted.internet.error.ConnectionLost

Dustin J. Mitchell dustin at v.igoro.us
Sun Jan 25 03:50:02 UTC 2015

This error occurs when the TCP connection between the master and slave
is severed.  This can happen due to firewalls losing state, or just
enough packet loss that the kernel decides the connection is dead.

This is a big problem at Mozilla, too, and has led to us always
locating masters in the same datacenter as slaves.


On Thu, Jan 22, 2015 at 1:43 AM, Jianjun Mao <justmao945 at gmail.com> wrote:
> Hi all,
> I met the frustrated error "exception slave lost", and the interrupt info is
> [Failure instance: Traceback (failure with no frames): <class
> 'twisted.internet.error.ConnectionLost'>: Connection to the other side was
> lost in a non-clean fashion.
> The network between my buildbot master(Ubuntu12.04) and slave(Ubuntu12.04)
> is not good, so I guess the reason may be the poor connection environment.
> The keep alive interval for master was 3600 and slave was 600 when I met the
> error. Then I changed both of them to 30, but it lost again.
> I searched Google but can not find out any solutions, so can anyone help me?
> Buildbot version 0.8.10
> Python version 2.7.3
> Thank you!
> Jianjun.
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