In case, Sentinel server is unable to communicate to T-Hub, even though T-Hub is reachable and all T-Hub certificates are copied to the Sentinel server, perform the following steps:
Navigate to the directory /etc/opt/novell/sentinel/intelligence in the Sentinel server.
Delete the file avro-schema-file-V1.json
Restart the Sentinel server:
rcsentinel restart
Restarting the Sentinel server regenerates the schema file and the user must be able to establish a successful connection to T-Hub.