OSMH: “The registration attempt failed due to java.net.SocketException: Connection reset”

Applies To:
OS Management Hub (OSMH)
Oracle Cloud Infrastructure

Symptoms:

OSMH On-Prem client instance registration failed with error below:

# /opt/oracle/mgmt_agent/agent_inst/bin/setup.sh opts=/tmp/input.rsp
Executing configure

        Parsing input response file
        Validating install key
        Generating communication wallet
        Generating security artifacts
        Registering Management Agent
CloudRegistrationStep : The registration attempt failed due to java.net.SocketException: Connection reset
Additional details are available in the configure logs at /opt/oracle/mgmt_agent/configure-logs

Agent configure failed.
Additional logs can be found at /opt/oracle/mgmt_agent/configure-logs/configure.log.0


$ cat configure.log.0
I/O exception (java.net.SocketException) caught when processing request to {tls}->http://<HOSTNAME>:
16080->https://management-agent.eu-frankfurt-1.oci.oraclecloud.com:443: Connection reset