Unable to activate service node: Error in cURL request: Failed to connect to port 8443: Connection refused

Symptoms

• Unable to activate service node with the following error:

  PLESK_ERROR: Error in cURL request: Failed to connect to 203.0.113.2 port 8443: Connection refused

• There are the following records in /var/log/plesk/panel.log on a management node:

  CONFIG_TEXT: [2017-09-18 15:13:44] ERR [extension/plesk-multi-server] Service node API-RPC is not available yet.
  [2017-09-18 15:14:06] ERR [extension/plesk-multi-server] Service node API-RPC is not available yet.
  [2017-09-18 15:14:29] ERR [extension/plesk-multi-server] Service node API-RPC is not available yet.
  [2017-09-18 15:14:53] ERR [extension/plesk-multi-server] Service node API-RPC is not available yet.

Cause

Not clear.

Resolution

Log into service node using SSH and execute the following command to restart Plesk services:

# systemctl restart sw-engine.service & systemctl restart sw-cp-server.service