Hi Vijay,
Have you read the SAP note mentioned in the log file. There is a solution described in the SAP note
If an ABAP system receives a ticket that contains a blank ABAP user ID, the system now issues a specific error message ("Ticket contains no/an empty ABAP user ID (see note 1159962)") that refers to your specific error situation. The problem is caused by the Java system that issues the ticket. The most probable reason for this error is that the specification of the ABAP reference system is missing (see PDF document). Errors may also occur if the option "ume.configuration.active=true" is not set in the JAAS login module "CreateTicketLoginModule" in Java.
SAP note 1159962 - Ticket contains no/an empty ABAP user ID
Could you check and revert back.
Hope this helps.
Regards,
Deepak Kori