3280597 - AS Java SUM deployment fails due to P4S port connection issue

The SAP NetWeaver Application Server for Java upgrade fails due to P4S port connection issues and errors similar to the below are recorded in the deploy.trc traces:

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Error: com.sap.ASJ.dpl_api.001224 Could not establish connection to AS Java on [P4S://<hostname>:<P4S port>]. Cannot get Socket. 
Reason:error 111 - Connection refused (Connection refused) (local port <port> to address <address details>, remote port <P4S port>. 
Check if the host and port specified are correct and AS Java is up and running.
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• SAP NetWeaver Application Server for Java (AS Java)
• SAP Release Independent

SAP NetWeaver Application Server all versions ; SAP NetWeaver Application Server for Java all versions ; SAP NetWeaver all versions ; SAP Process Integration all versions ; SAP Solution Manager 7.2 ; SAP enhancement package 1 for SAP NetWeaver Composition Environment 7.1

jcmon, instance startup, SAP MMC, SMICM ,SAP Production ERP SRM CRM ERP PPM SEM APO XI PI PORTAL issue ume.r3.connection.master.sysnr ume.r3.connection.master.ashost RFC_SYS_EXCEPTION RFC_ERROR_LOGON_FAILURE 718383 1512766 dialog logon  SAP GUI cluster restart , KBA , BC-JAS-DPL , Deployment , BC-UPG-TLS-TLJ , Upgrade tools for Java , BC-JAS-COR-RMT , RMI, P4, CORBA, IIOP , Problem