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[Swaminathan Vasudevan <swaminathan.vasudevan@xxxxxx>]

Public bug reported:

Recently the logstash logs showed traces about "SNAT port not found for
the given internal port".

http://logs.openstack.org/22/219422/13/check/gate-tempest-dsvm-neutron-
dvr/e5243b2/logs/screen-q-l3.txt.gz?level=TRACE#_2015-09-15_12_28_08_880

By analyzing the failure it seems when a gateway is removed, the
"get_snat_port_for_internal_port" is called without the cache value.

This bug was introduced by the patch shown below.

Icc099c1a97e3e68eeaf4690bc83167ba30d8099a

** Affects: neutron
     Importance: Undecided
     Assignee: Swaminathan Vasudevan (swaminathan-vasudevan)
         Status: In Progress


** Tags: l3-dvr-backlog

** Changed in: neutron
       Status: New => Confirmed

** Changed in: neutron
     Assignee: (unassigned) => Swaminathan Vasudevan (swaminathan-vasudevan)

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https://bugs.launchpad.net/bugs/1496578

Title:
  SNAT port not found for the given internal port error message seen
  when gateway is removed for DVR routers.

Status in neutron:
  In Progress

Bug description:
  Recently the logstash logs showed traces about "SNAT port not found
  for the given internal port".

  http://logs.openstack.org/22/219422/13/check/gate-tempest-dsvm-
  neutron-
  dvr/e5243b2/logs/screen-q-l3.txt.gz?level=TRACE#_2015-09-15_12_28_08_880

  By analyzing the failure it seems when a gateway is removed, the
  "get_snat_port_for_internal_port" is called without the cache value.

  This bug was introduced by the patch shown below.

  Icc099c1a97e3e68eeaf4690bc83167ba30d8099a

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