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[Ryan Moe <rmoe@xxxxxxxxxxxx>]

Public bug reported:

When another process already has an exclusive lock on a pid file
subsequent attempts to lock will block indefinitely. This is problematic
when this happens in e.g the ns-metadata-proxy. When the ns-metadata-
proxy blocks on locking its pid file the l3-agent will not be able to
bring up any of the router's interfaces.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1315507

Title:
  Attempts to lock pid files should be non-blocking

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  When another process already has an exclusive lock on a pid file
  subsequent attempts to lock will block indefinitely. This is
  problematic when this happens in e.g the ns-metadata-proxy. When the
  ns-metadata-proxy blocks on locking its pid file the l3-agent will not
  be able to bring up any of the router's interfaces.

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