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[Bernard Cafarelli <1862178@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1862178

Title:
  Fullstack tests failing due to "hang" neutron-server process

Status in neutron:
  Fix Released

Bug description:
  From time to time some fullstack tests are failing and it seems that the problem is with not responding neutron-server process.
  There is almost nothing in neutron-server's logs in such case.

  Example of such failure:
  https://c355270b22583c2d2af0-42801c5a43c64ea303a559bec7f7cdd7.ssl.cf5.rackcdn.com/705903/2/check/neutron-
  fullstack/79cf197/testr_results.html

  neutron-server logs
  (https://c355270b22583c2d2af0-42801c5a43c64ea303a559bec7f7cdd7.ssl.cf5.rackcdn.com/705903/2/check/neutron-
  fullstack/79cf197/controller/logs/dsvm-fullstack-
  logs/TestBwLimitQoSOvs.test_bw_limit_qos_policy_rule_lifecycle_egress_/neutron-
  server--2020-02-05--11-00-19-067345_log.txt) ends on:

  2020-02-05 11:00:36.851 3180 INFO neutron.plugins.ml2.managers [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] Initializing driver for type 'gre'
  2020-02-05 11:00:36.852 3180 INFO neutron.plugins.ml2.drivers.type_tunnel [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] gre ID ranges: [(1, 1000)]
  2020-02-05 11:00:37.796 3180 INFO neutron.plugins.ml2.managers [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] Initializing driver for type 'local'
  2020-02-05 11:00:37.797 3180 INFO neutron.plugins.ml2.managers [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] Initializing driver for type 'vlan'
  2020-02-05 11:01:11.476 3180 INFO neutron.plugins.ml2.drivers.type_vlan [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] VlanTypeDriver initialization complete
  2020-02-05 11:01:11.479 3180 INFO neutron.plugins.ml2.managers [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] Initializing driver for type 'vxlan'
  2020-02-05 11:01:11.480 3180 INFO neutron.plugins.ml2.drivers.type_tunnel [req-03044462-4bac-4f8e-acac-d6aae381a3d9 - - - - -] vxlan ID ranges: [(1001, 2000)]

  So it seems that it didn't initialize properly ml2 extension drivers
  and mechanism drivers.

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