[Varnish] #1242: Varnish throws 503 without touching the healthy backend

[Varnish]

#1242: Varnish throws 503 without touching the healthy backend
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 Reporter:  xjia      |       Owner:  martin
     Type:  defect    |      Status:  new
 Priority:  normal    |   Milestone:
Component:  varnishd  |     Version:  3.0.0
 Severity:  critical  |  Resolution:
 Keywords:            |
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Comment (by xjia):

 I have upgraded Varnish from 3.0.0 to 3.0.3, the problem is still there.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1242#comment:2>
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