Hi ​@benoitp , are we sure that this is a CMA related issue, and not an invalid data in one of the hosts ? 

could you try : 

• first test : delete Agent configuration (or put it temporary on another poller) and generate configuration on the initial poller
• second test : create the same Agent configuration on another Poller ang generate configuration

can you also join a screenshot of your agent configuration, or the otl_server.json file (with fake IP/DNS of course) ? 

thanks

Hello,

It’s a test server, everything on it (cbd, engine, web ui,….) trying to monitor himself via CMA.

The server is a totally fresh install of  24.10.12 on RH 9, I follow this doc to setup a connection Poller → Agent  : https://docs.centreon.com/pp/integrations/plugin-packs/getting-started/how-to-guides/cma/cma-setup/

Test 1 :

  * Agent configuration deleted → Poller config generation OK.

Test 2

  * Re-add the Agent configuration → Poller config generation OK.

Well, be magic it’s working now, as the only things I have done are

  * removed the host’s alias I added previously to get it working

  * destroyed the agent configuration and add it again.

UI conf :

Files :

$ cat /etc/centreon-monitoring-agent/centagent.json
{
    "log_file":"/var/log/centreon-monitoring-agent/centagent.log",
    "log_level":"info",
    "log_type":"file",
    "log_max_file_size":10,
    "log_max_files":3,
    "endpoint":"0.0.0.0:4317",
    "encryption":false,
    "public_cert":"",
    "private_key":"",
    "ca_certificate":"",
    "ca_name":"",
    "host":"localhost",
    "reversed_grpc_streaming":true
}

 $ cat /etc/centreon-engine/otl_server.json
{
    "otel_server": {
        "host": "0.0.0.0",
        "port": 4317,
        "encryption": false,
        "public_cert": "",
        "private_key": "",
        "ca_certificate": "",
        "trusted_tokens": b]
    },
    "centreon_agent": {
        "check_interval": 60,
        "export_period": 60,
        "reverse_connections":  
            {
                "host": "127.0.0.1",
                "port": 4317,
                "encryption": false,
                "ca_certificate": "",
                "ca_name": null,
                "token": null
            }
        ]
    }

Thanks.

There i a known issue in No TLS for poller-initiated connection, maybe it’s related. 

I will try to reproduce the issue on my side.

We reproduced the issue.It will be fixed as soon as possible.