Observations

While the MES middleware alone fails over, the System Platform log on the Application Server machine logs warnings and errors indicating the inability of the objects to communicate with the middleware while the middleware is unavailable. However, the MES objects recover after the failover and no more errors/warnings are reported in the Logger.

• The Archive operation is aborted after the middleware failover and the same is indicated against the job in the client and the System Platform log on the MES Middleware server.

• The Purge operation is aborted after the middleware failover and the same is indicated against the job in the client and the System Platform log on the MES Middleware server.

• The database is left undisturbed.

• When the Application Server alone fails over, the middleware logs Lost connection to subscription warnings. There are a few warnings and errors in the Application Server machine; however, the Application Server stabilizes eventually (as defined by the RTO).

• When both the Application Server and the middleware fail over, the middleware comes back online and does not log any warnings or errors. However, the Application Server is unable to recover with multiple warnings and errors logged to the Logger.