"Error with Neutron Agents and Tempest Installation in OpenStack: 'No process found' and 'Operation not permitted'"

Question

I'm working with OpenStack and running the Tempest installation as part of the setup process. However, I encountered multiple errors during execution.

Here’s the error log I’m seeing:

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Waiting jobs:
Job /opt/stack/async/install_tempest.ini :

[job]
end_time = 1737595137421
pid = 333551
start_time = 1737595097868
command = install_tempest
Failed PID status:
cat: /proc/424540/status: No such file or directory

exit_trap: cleaning up child processes
Error on exit
neutron-dhcp-agent: no process found
neutron-l3-agent(432631): Operation not permitted
neutron-l3-agent: no process found
neutron-metadata-agent: no process found
I’m using the following environment:

OpenStack version: [Include version details if known]
Operating System: Ubuntu [Include version details if known]
Neutron agents involved: neutron-dhcp-agent, neutron-l3-agent, neutron-metadata-agent

Steps I’ve tried: I checked if the Neutron agents were running and found that they weren’t. I attempted to restart the services but received the "Operation not permitted" error for the neutron-l3-agent. I verified the process status and noticed that several processes are missing or not running as expected. I’m stuck on how to resolve the issues, especially the "Operation not permitted" errors and the failed installation of Tempest. Any help would be greatly appreciated!

Thanks!