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[Gökhan <1917882@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Nova-api which is working behind uwsgi intermittently  gives timeout error when connecting rabbitmq. I changed heartbeat_timeout_threshold from 60s to 120s and 180s and it doesn't change anything about timeout errors. I also make performance tuning on rabbitmq both kernel parameters [1] and rabbitmq.config [1] but this also doesn't change anything about timeout errors. I doubt about nova, uwsgi and eventlet doesn't work correctly together. I am sending log files below:
Nova-api logs: http://paste.openstack.org/show/803264/ and http://paste.openstack.org/show/803263/
Rabbitmq logs: http://paste.openstack.org/show/803269/

Information about my environment:
Version: OpenStack Ussuri
OS: Ubuntu 18.04.5 LTS
Python libraries versions: http://paste.openstack.org/show/803270/
nova.conf: http://paste.openstack.org/show/803271/
Rabbitmqctl status: http://paste.openstack.org/show/803274/

[1] http://paste.openstack.org/show/803272/
[2] http://paste.openstack.org/show/803273/

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: nova-api oslo.messaging

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https://bugs.launchpad.net/bugs/1917882

Title:
  Nova-api intermittently  gives timeout error when connecting rabbitmq

Status in OpenStack Compute (nova):
  New

Bug description:
  Nova-api which is working behind uwsgi intermittently  gives timeout error when connecting rabbitmq. I changed heartbeat_timeout_threshold from 60s to 120s and 180s and it doesn't change anything about timeout errors. I also make performance tuning on rabbitmq both kernel parameters [1] and rabbitmq.config [1] but this also doesn't change anything about timeout errors. I doubt about nova, uwsgi and eventlet doesn't work correctly together. I am sending log files below:
  Nova-api logs: http://paste.openstack.org/show/803264/ and http://paste.openstack.org/show/803263/
  Rabbitmq logs: http://paste.openstack.org/show/803269/

  Information about my environment:
  Version: OpenStack Ussuri
  OS: Ubuntu 18.04.5 LTS
  Python libraries versions: http://paste.openstack.org/show/803270/
  nova.conf: http://paste.openstack.org/show/803271/
  Rabbitmqctl status: http://paste.openstack.org/show/803274/

  [1] http://paste.openstack.org/show/803272/
  [2] http://paste.openstack.org/show/803273/

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