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The Tivoli Workload Broker agent can not communicate with the server when certificate has not been renewed before the expiration date
The following error is displayed into logs:
SEVERE: CTGEM0016E The CertManagement.Renewal.Port parameter cannot be NULL.
Resolving the problem
Edit the <Agent folder>/ep/runtime/agent/config/endpoint.properties adding the following field:
Stop and restart the agent