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[Satish Patel <1910837@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Just deployed openstack victoria on Ubuntu 20.04 using openstack-
ansible. everything looks good i am able to spin up VM etc. but seeing
strange error in nova-compute logs and its periodically constantly
throwing exception error.

** Full log file: http://paste.openstack.org/show/801529/


Jan 09 04:19:34 compute01 nova-compute[31096]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
Jan 09 04:19:34 compute01 nova-compute[31096]: Traceback (most recent call last):
Jan 09 04:19:34 compute01 nova-compute[31096]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
Jan 09 04:19:34 compute01 nova-compute[31096]:     assert len(_active) == 1
Jan 09 04:19:34 compute01 nova-compute[31096]: AssertionError:
Jan 09 04:19:34 compute01 nova-compute[31099]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
Jan 09 04:19:34 compute01 nova-compute[31099]: Traceback (most recent call last):
Jan 09 04:19:34 compute01 nova-compute[31099]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
Jan 09 04:19:34 compute01 nova-compute[31099]:     assert len(_active) == 1
Jan 09 04:19:34 compute01 nova-compute[31099]: AssertionError:
Jan 09 04:19:34 compute01 nova-compute[31102]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
Jan 09 04:19:34 compute01 nova-compute[31102]: Traceback (most recent call last):
Jan 09 04:19:34 compute01 nova-compute[31102]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
Jan 09 04:19:34 compute01 nova-compute[31102]:     assert len(_active) == 1
Jan 09 04:19:34 compute01 nova-compute[31102]: AssertionError:
Jan 09 04:19:34 compute01 nova-compute[31105]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
Jan 09 04:19:34 compute01 nova-compute[31105]: Traceback (most recent call last):
Jan 09 04:19:34 compute01 nova-compute[31105]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
Jan 09 04:19:34 compute01 nova-compute[31105]:     assert len(_active) == 1
Jan 09 04:19:34 compute01 nova-compute[31105]: AssertionError:

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1910837

Title:
  nova-compute "Exception ignored in: function _after_fork" in logs

Status in OpenStack Compute (nova):
  New

Bug description:
  Just deployed openstack victoria on Ubuntu 20.04 using openstack-
  ansible. everything looks good i am able to spin up VM etc. but seeing
  strange error in nova-compute logs and its periodically constantly
  throwing exception error.

  ** Full log file: http://paste.openstack.org/show/801529/

  
  Jan 09 04:19:34 compute01 nova-compute[31096]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
  Jan 09 04:19:34 compute01 nova-compute[31096]: Traceback (most recent call last):
  Jan 09 04:19:34 compute01 nova-compute[31096]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
  Jan 09 04:19:34 compute01 nova-compute[31096]:     assert len(_active) == 1
  Jan 09 04:19:34 compute01 nova-compute[31096]: AssertionError:
  Jan 09 04:19:34 compute01 nova-compute[31099]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
  Jan 09 04:19:34 compute01 nova-compute[31099]: Traceback (most recent call last):
  Jan 09 04:19:34 compute01 nova-compute[31099]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
  Jan 09 04:19:34 compute01 nova-compute[31099]:     assert len(_active) == 1
  Jan 09 04:19:34 compute01 nova-compute[31099]: AssertionError:
  Jan 09 04:19:34 compute01 nova-compute[31102]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
  Jan 09 04:19:34 compute01 nova-compute[31102]: Traceback (most recent call last):
  Jan 09 04:19:34 compute01 nova-compute[31102]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
  Jan 09 04:19:34 compute01 nova-compute[31102]:     assert len(_active) == 1
  Jan 09 04:19:34 compute01 nova-compute[31102]: AssertionError:
  Jan 09 04:19:34 compute01 nova-compute[31105]: Exception ignored in: <function _after_fork at 0x7f45a7232670>
  Jan 09 04:19:34 compute01 nova-compute[31105]: Traceback (most recent call last):
  Jan 09 04:19:34 compute01 nova-compute[31105]:   File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
  Jan 09 04:19:34 compute01 nova-compute[31105]:     assert len(_active) == 1
  Jan 09 04:19:34 compute01 nova-compute[31105]: AssertionError:

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