2338750 - Administrator user cannot logon: SUM deployment fails

Administrator user cannot logon to the SAP NetWeaver Application Server for Java and this leads to deployment via SUM (Software Update Manager) to fail. Error in SUM traces:

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You must enter a valid AS Java Administrator password.
Dialog eliminator jeeAdminPassEliminator does not allow to omit dialog UserPasswords
Validatable parameter J2EE/J2EEADMIN/PWD has been validated by validator RequiredFields.
Validatable parameter J2EE/J2EEADMIN/PWD is invalid according to validator J2EEAdministratorPasswordValidator.
Dialog eliminator jeeAdminPassEliminator does not allow to omit dialog UserPasswords

Could not authenticate the given user with AS Java. Check that user and password are correct.
Overal deployment message : Could not authenticate the given user with AS Java. Check that user and password are correct.
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In the AS Java default traces, a failed logon attempt is populated:
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LOGIN.FAILED
User: Administrator
Authentication Stack: service.naming
Authentication Stack Properties:
template = ticket
Login Module                                                               Flag        Initialize  Login      Commit     Abort      Details
com.sap.security.core.server.jaas.EvaluateTicketLoginModule             SUFFICIENT  ok          false                 true
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• SAP NetWeaver
• Release Independent

SAP Composition Environment all versions ; SAP NetWeaver 7.1 ; SAP NetWeaver 7.2 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP Process Integration all versions ; SAP enhancement package 1 for SAP NetWeaver 7.3

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