Db2 HADR status is red on the Welcome page although the Multi-Master cluster is functional

The Multi-Master section on the Welcome page of the graphical user interface and the Multi-Master page display Db2® HADR status as Db2 HADR status is red although the Multi-Master cluster is up and running.

Check for the following exception in the agent log:
Thread[Thread-6,5,main] all:com.ibm.sklm.agent.listener.AgentTrustManager isTrusted
ALL:
java.security.cert.CertificateExpiredException: NotAfter: 
CertificateExpiredException: NotAfter:

This exception occurs when the agent certificate has expired.

Resolution

  1. Stop the agent service. See Stop Agent.
  2. Rename the agentks.jks file under SKLM_INSTALL_HOME\agent\.
  3. Start the agent service. See Agent Starter.

A new keystore is created that has the new agent certificate and the Multi-Master configuration status changes to green (Db2 HADR status is green icon).