[Varnish] #1677: varnish init script returns before varnishlog can access it.

[Varnish]

#1677: varnish init script returns before varnishlog can access it.
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 Reporter:  mattjbarlow  |       Type:  defect
   Status:  new          |   Priority:  normal
Milestone:               |  Component:  build
  Version:  unknown      |   Severity:  normal
 Keywords:               |
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 If you restart the varnish service and the varnishlog service directly
 after, varnishlog fails to restart. You must wait a few seconds before
 restarting varnishlog. I tested this on Ubuntu 14.04 installing varnish
 4.0.2-1 from the varnish-cache repository.

 You can duplicate this by writing a script that performs a 'service
 varnish restart' followed by a 'service varnishlog restart' (see gist
 below). The varnishlog restart will fail, and then when you manually run
 it it will succeed the 2nd time.

 https://gist.github.com/mattjbarlow/bf067ab4d09852b9d03b

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1677>
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