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[Bug 2117153] [NEW] neutron-openvswitch-agent crashes on start

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Alexander Miroch <2117153@xxxxxxxxxxxxxxxxxx>
Date: Thu, 17 Jul 2025 12:14:00 -0000
Reply-to: Bug 2117153 <2117153@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

Public bug reported:

Once restarted network-openvswitch-agent crashed with the following
lines

2025-07-17 11:06:46.029 7 ERROR OfctlService [-] failed to send message
<version=0x4,msg_type=0xe,msg_len=0x50,xid=0x9c9fbdd7,OFPFlowMod(buffer_id=4294967295,command=0,cookie=80568845344271508,cookie_mask=0,flags=0,hard_timeout=0,idle_timeout=0,instructions=[OFPInstructionActions(actions=[OFPActionOutput(len=16,max_len=0,port=4294967290,type=0)],len=24,type=4)],match=OFPMatch(oxm_fields={}),out_group=0,out_port=0,priority=0,table_id=0)>

2025-07-17 11:06:46.051 7 ERROR os_ken.base.app_manager [-]
ofctl_service: Exception occurred during handler processing. Backtrace
from offending handler [_handle_send_msg] servicing event
[SendMsgRequest] follows.: AssertionError


Full stack trace and logs
https://paste.openstack.org/show/bTmB1uUCY5TsgQTRJq48


ml2/openvswitch_agent.ini
https://paste.openstack.org/show/bb9qypZzk6Zz8QejHkpW


The ongoing restart was successful but caused a probable network malfunction due to partially loaded flows.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2117153

Title:
  neutron-openvswitch-agent crashes on start

Status in neutron:
  New

Bug description:
  Once restarted network-openvswitch-agent crashed with the following
  lines

  2025-07-17 11:06:46.029 7 ERROR OfctlService [-] failed to send
  message
  <version=0x4,msg_type=0xe,msg_len=0x50,xid=0x9c9fbdd7,OFPFlowMod(buffer_id=4294967295,command=0,cookie=80568845344271508,cookie_mask=0,flags=0,hard_timeout=0,idle_timeout=0,instructions=[OFPInstructionActions(actions=[OFPActionOutput(len=16,max_len=0,port=4294967290,type=0)],len=24,type=4)],match=OFPMatch(oxm_fields={}),out_group=0,out_port=0,priority=0,table_id=0)>

  2025-07-17 11:06:46.051 7 ERROR os_ken.base.app_manager [-]
  ofctl_service: Exception occurred during handler processing. Backtrace
  from offending handler [_handle_send_msg] servicing event
  [SendMsgRequest] follows.: AssertionError

  
  Full stack trace and logs
  https://paste.openstack.org/show/bTmB1uUCY5TsgQTRJq48

  
  ml2/openvswitch_agent.ini
  https://paste.openstack.org/show/bb9qypZzk6Zz8QejHkpW

  
  The ongoing restart was successful but caused a probable network malfunction due to partially loaded flows.

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