** Description changed:
When performing a heartbeat to rabbit (inside a nova-compute process),
there is a greenlet error which causes a hard crash.
I'm not exactly sure what details are relevant, but can provide more
info if there's something that will be useful!
This is on RHEL7 (essentially... somewhat custom image based on it)
Log snippet:
```
2021-07-07 19:34:52,686 DEBUG [oslo.messaging._drivers.impl_rabbit]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/oslo_messaging/_drivers/impl_rabbit.py:__init__:608
[279fc413-9d7c-4fad-89e8-8de308658947] Connecting to AMQP server on
127.0.0.1:5671
2021-07-07 19:34:52,699 DEBUG [amqp.connection.Connection.heartbeat_tick]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/connection.py:heartbeat_tick:726
heartbeat_tick : for connection 79f7cf4331b34cb0a2e3608281076773
2021-07-07 19:34:52,699 DEBUG [amqp.connection.Connection.heartbeat_tick]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/connection.py:heartbeat_tick:740
heartbeat_tick : Prev sent/recv: None/None, now - 6/6, monotonic -
9634.717472491, last_heartbeat_sent - 9634.717470288, heartbeat int. - 60 for
connection 79f7cf4331b34cb0a2e3608281076773
2021-07-07 19:34:52,700 DEBUG [amqp.connection.Connection.heartbeat_tick]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/connection.py:heartbeat_tick:726
heartbeat_tick : for connection 79f7cf4331b34cb0a2e3608281076773
2021-07-07 19:34:52,701 DEBUG [amqp.connection.Connection.heartbeat_tick]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/connection.py:heartbeat_tick:740
heartbeat_tick : Prev sent/recv: 6/6, now - 6/6, monotonic - 9634.719438155,
last_heartbeat_sent - 9634.717470288, heartbeat int. - 60 for connection
79f7cf4331b34cb0a2e3608281076773
2021-07-07 19:34:52,718 DEBUG [amqp]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/connection.py:_on_start:382
Start from server, version: 0.9, properties: {'capabilities':
{'publisher_confirms': True, 'exchange_exchange_bindings': True, 'basic.nack':
True, 'consumer_cancel_notify': True, 'connection.blocked': True,
'consumer_priorities': True, 'authentication_failure_close': True,
'per_consumer_qos': True, 'direct_reply_to': True}, 'cluster_name':
'rabbit_5672@fedb460a.openstack', 'copyright': 'Copyright (c) 2007-2020 VMware,
Inc. or its affiliates.', 'information': 'Licensed under the MPL 1.1. Website:
https://rabbitmq.com', 'platform': 'Erlang/OTP 23.0.2', 'product': 'RabbitMQ',
'version': '3.8.5'}, mechanisms: [b'PLAIN', b'AMQPLAIN', b'EXTERNAL'], locales:
['en_US']
2021-07-07 19:34:52,719 DEBUG [amqp]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/channel.py:__init__:104
using channel_id: 1
2021-07-07 19:34:52,720 DEBUG [amqp]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/channel.py:_on_open_ok:444
Channel open
2021-07-07 19:34:52,721 DEBUG [amqp.connection.Connection.heartbeat_tick]
/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/amqp/connection.py:heartbeat_tick:726
heartbeat_tick : for connection c0299792d20e42a2b0a17d037d7d3058
Traceback (most recent call last):
File
"/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/eventlet/hubs/hub.py",
line 476, in fire_timers
timer()
File
"/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/eventlet/hubs/timer.py",
line 59, in __call__
cb(*args, **kw)
File
"/opt/openstack/venv/nova-23.0.20031033070/lib/python3.8/site-packages/eventlet/semaphore.py",
line 152, in _do_acquire
waiter.switch()
greenlet.error: cannot switch to a different thread
```
Versions:
```
oslo.messaging==12.7.1
nova==23.0.2 (packaged locally from stable/wallaby as of July 3, 2021)
```
+
+
-------------------------------------------------------------------------------
+
+ [Impact]
+ The Nova default value of heartbeat_in_pthread needs to be False for non-wsgi
services otherwise they crash when attempting to send a heartbeat message e.g.
in a greenthread like nova-compute. This backports the patch to Jammy/Yoga in
Ubuntu.
+
+ [Test Plan]
+ * Deploy Openstack Yoga on Jammy
+ * By default a heartbeat is checked 2 times every 60 seconds
+ * Check /var/log/nova/nova-compute.log and ensure that do not see any
"greenlet.error: cannot switch to a different thread" errors
+
+ [Regression Potential]
+ No regressions are expected as a result of this patch.
** Patch added: "lp1934937_jammy.debdiff"
https://bugs.launchpad.net/oslo.messaging/+bug/1934937/+attachment/5790492/+files/lp1934937_jammy.debdiff
** Also affects: nova (Ubuntu)
Importance: Undecided
Status: New
** Also affects: nova (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: cloud-archive/yoga
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1934937
Title:
Heartbeat in pthreads in nova-wallaby crashes with greenlet error
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