DuplicateMessageError after restart of a control node

Pawel Konczalski pawel.konczalski at everyware.ch
Tue Jul 23 14:57:03 UTC 2019


Hello everybody,

after restart of one of the control nodes i see this error message every 
few seconds int the logs:

@timestamp               July 23rd 2019, 16:44:08.927
t  Hostname               ctlX
t  Logger               openstack.nova
t  Payload               Failed to process message ... skipping it.: 
DuplicateMessageError: Found duplicate 
message(f2178cffb5d249f3a1d2df1c0322f18c). Skipping it.
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit 
Traceback (most recent call last):
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit   
File 
"/var/lib/kolla/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", 
line 361, in _callback
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit 
self.callback(RabbitMessage(message))
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit   
File 
"/var/lib/kolla/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", 
line 251, in __call__
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit     
unique_id = self.msg_id_cache.check_duplicate_message(message)
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit   
File 
"/var/lib/kolla/venv/local/lib/python2.7/site-packages/oslo_messaging/_drivers/amqp.py", 
line 122, in check_duplicate_message
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit     
raise rpc_common.DuplicateMessageError(msg_id=msg_id)
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit 
DuplicateMessageError: Found duplicate 
message(f2178cffb5d249f3a1d2df1c0322f18c). Skipping it.
2019-07-23 16:44:08.927 82 ERROR oslo.messaging._drivers.impl_rabbit
t  Pid               82
t  Timestamp               2019-07-23 16:44:08.927
t  _id              AWwfSjEtsndUu9YeotwF
t  _index              flog-2019.07.23
#  _score             -
t  _type              fluentd
t  log_level               ERROR
t  programname               nova-scheduler
t  python_module               oslo.messaging._drivers.impl_rabbit


As soon as the restarted node is taken out of the cluster, the errors 
disappear.

Any idea how to fix this?


Thank you

Pawel
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