Could not connect to the controller/invalid response from controller, controller host [SaaS domain], port[443]

[Yatphiroon_Prem]

Hi,

I have an issue of the connection between an installed AppAgent (Java) in Application Server (On-Premise, Linux CentOS), which is already mapped to Public IP, and SaaS Controller (License expires : 14/02/2024)

By the way I've already set up proxy on /etc/profile, and my Application Server be able to curl the SaaS Controller,
but the following errors still occur like there's another configures i need to set up more but I have no idea Y_Y :

[AD Thread Pool-Global0]  WARN ConfigurationChannel - Could not connect to the controller/invalid response from controller, cannot get initialization information, controller host [SaaS domain], port[443]

[AD Thread Pool-Global0] ERROR NetVizAgentRequest -  Fatal transport error while connecting to URL [http://127.0.0.1:3892/api/agentinfo?timestamp=0&agentType=APP_AGENT&agentVersion=2.4.0]: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:3892 [/127.0.0.1] failed: Connection refused (Connection refused)

[AD Thread Pool-Global1] WARN NetVizConfigurationChannel - NetViz-ConfigChannel-039 : NetViz configuration retrieval failed with reason [Connection back off limitation in effect: /controller/instance/null/netvizagentconfiguration]

[Sunil_Agarwal · Accepted solution]

Hi @Yatphiroon.Prempree ,

[AD Thread Pool-Global0] ERROR NetVizAgentRequest - Fatal transport error while connecting to URL [http://127.0.0.1:3892/api/agentinfo?timestamp=0&agentType=APP_AGENT&agentVersion=2.4.0]: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:3892 [/127.0.0.1] failed: Connection refused (Connection refused)

Do you have network agent running? App agent appears to be attempting a connection with network agent. You can disable the following to stop these error messages if you don't have a network agent.
OR
You can ignore those errors as it should  not have any impact.

Disable Socket Instrumentation

1. In the Controller, click the gear icon in the top right  and choose AppDynamics Agents > App Server Agents.
2. Select the agent in the table and click Configure. The App Server Agent Configuration page appears.
3. Select the application, tier, and node in the treeview (left).
4. Select Use Custom Configuration and then click + (the "plus-sign" button) Create Agent Property.
5. In the Edit Agent Property dialog box, specify:
   1. Name = socket-enabled
   2. Type = Boolean
   3. Value = false