[2.21.1-Build 16] Exception AssertionError: AssertionError() in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored

[Daisuke Nakajima]

log messages below is seen repeatedly on Compute node.

==> /var/log/contrail/contrail-vrouter-nodemgr-stderr.log <==
wokeup and found a line
Exception AssertionError: AssertionError() in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
Warning novarc not sourced
Openstack Nova Compute status unchanged at:PROCESS_STATE_RUNNING
Exception AssertionError: AssertionError() in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
Exception AssertionError: AssertionError() in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
Sending UVE:NodeStatusUVE(_context='', _scope='', _category='', _send_queue_enabled=True, _seqnum=0, _versionsig=2778367443, _source='contrail-07', _instance_id='0', _client=None, _type=6, _hints=1, _http_server=None, _logger=None, _more=False, _node_type='Compute', data=NodeStatus(status=None, name='contrail-07', deleted=None, disk_usage_info=[DiskPartitionUsageStats(partition_space_available_1k=324108340, partition_space_used_1k=6723488, partition_name='/dev/sda1', partition_type='ext4')], process_status=None, all_core_file_list=None, _table='ObjectVRouter', process_info=None, description=None), _module='contrail-vrouter-nodemgr', _level=2147483647, _timestamp=1450059482750521, _client_context='', _connect_to_collector=True, _role=0)Exception AssertionError: AssertionError() in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored