[Buildbot] #3048: ConnectionError when the Docker host is not available

[Buildbot trac]

#3048: ConnectionError when the Docker host is not available
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Reporter:  Ben                    |       Owner:
    Type:  defect                 |      Status:  new
Priority:  major                  |   Milestone:  undecided
 Version:  master                 |  Resolution:
Keywords:  docker, slave, latent  |
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Comment (by sa2ajj):

 I '''think''' the traceback is a bit confusing: the 'while substantiating`
 part actually took place earlier than the `while preparing` one, but it
 was reported in a wrong order.

 (This does not answer the question and does not shed the light.)

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Ticket URL: <http://trac.buildbot.net/ticket/3048#comment:5>
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