1857914 - Activity "Register ADC collector" fails with error Authentication did not succeed

Symptom 1

An error occured during JMX API invokation : [JmxService] Error accessing JmxProxy for sid [<SID>] - InsNbr [null]; nested exception is:
com.sap.smdagent.plugins.connectors.jmx.exc.RemoteJmxException: [JmxProxy_754208727_<SID>] Error during initialization; nested exception is:
com.sap.smdagent.plugins.connectors.jmx.exc.RemoteJmxException: Unable to connect to connector server.; nested exception is:
com.sap.smdagent.plugins.connectors.jmx.exc.RemoteJmxException: Exception during getInitialContext operation. Wrong security principle/credentials.; nested exception is:
com.sap.smdagent.plugins.connectors.jmx.exc.RemoteJmxException: Cannot authenticate the user.; nested exception is:
com.sap.smdagent.plugins.connectors.jmx.exc.RemoteJmxException: Authentication did not succeed.

Symptom 2

Message: Remote error: Connection to P4 port of managed system failed
Details: No P4 connection could be established to <SID> from <Host> Access is denied to SAP System sid [<SID>]: check the connection credentials.
More details about the error in agent <Host> log file (SMDAgentApplication.X.log).;
nested exception is: com.sap.engine.services.security.exceptions.BaseLoginException: Authentication did not succeed.
(cause=com.sap.engine.services.security.exceptions.BaseLoginException Authentication did not succeed.)

• SAP Solution Manager 7.10
• SAP Solution Manager 7.20
• SAP Solution Manager Diagnostics

Register ADC collector, Authentication did not succeed, Wrong security principle/credentials, Connection to P4 port of managed system failed, JAVA Admin user, SM_COLL_<SID> , KBA , SV-SMG-DIA-APP-WA , Workload Analysis , SV-SMG-INS-CFG , Setup and Configuration of the Solution Manager system , Problem