1726902 - PREPARE/INIT/USER_PASSWORD Error while trying to get initial context during upgrade or EHP installation

 During Prepare phase of upgrade or EHP Installation you may end with below error:

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The execution of PREPARE/INIT/USER_PASSWORDS ended in error.

Could not execute dialog UserPasswords. See previous messages.
Error while trying to validate Administrator password.
     Possible reason: the J2EE engine is not started.
     Error while trying to get initial context.
    
com.sap.engine.services.jndi.persistent.exceptions.NamingException: Exception during getInitialContext operation. No server is running. [Root exception is com.sap.engine.services.security.exceptions.BaseLoginException: Exception in creating new RemoteLoginContext instance.]
com.sap.engine.services.security.exceptions.BaseLoginException: Exception in creating new RemoteLoginContext instance.
com.sap.engine.services.rmi_p4.P4ConnectionException: Incorrect client ID. The stub is not connected yet.
Nested exception is: 
com.sap.engine.services.rmi_p4.P4ConnectionException: The stub cannot establish connection.

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SAP J2EE Engine 6.40,SAP J2EE Engine 7.00

sapjup ,sapehpi ,sum ,com.sap.engine.services.rmi_p4.P4ConnectionException ,getInitialContext , com.sap.engine.services.security.exceptions.BaseLoginException ,Exception in creating new RemoteLoginContext ,bindHost , Could not execute dialog UserPasswords , KBA , BC-JAS-ADM-ADM , Administration , BC-JAS-SEC , Security, User Management , BC-UPG-TLS-TLJ , Upgrade tools for Java , BC-EHP-INS-TLJ , EHP Installer deprecated. Please use BC-UPG-TLS-TLJ , Problem