APPLICATION SERVER PRODUCTION SOFTWARE UPGRADING WITH HIGH AVAILABILITY STAGING SOFTWARE

An application system comprising an application server configured to run first version software for an application and second version software for the application. The application system further comprises a staging database server configured to initially interface with the second version software to populate a staging database system with second data for the application generated by the second version software. The application system further comprises a production database server configured to initially interface with the first version software to populate a production database system with first data for the application generated by the first version software, synchronize the first data with the second data to replicate the second data to the production database system, cease interfacing with the first version software and begin to interface with the second version software to populate the production database system with the second data generated by the second version software.