we are seeing two severe messages in the server.log,can someone help with the necessary action to be taken.
1.2016-07-29 09:16:27 SEVERE [DefaultRepositoryExceptionHandler] Could not handle exception. See attached exception: Connection has already been closed.: com.dynatrace.diagnostics.repository.exceptiontranslators.DefaultRepositoryExceptionHandler handleException:41
2016-07-29 09:11:31 SEVERE [BaseRequestListener] got exception without message: com.dynatrace.diagnostics.communication.tcp.connection.BaseRequestListener notifyRequest:55
Seems the Dynatrace Server had an issue connecting to your Database that you have configured for the Performance Warehouse. Could be that there was a network connection issue or maybe the database had an issue.
If you can verify that your perf warehouse is connected then I would not worry about this. the dynatrace server will try to reconnect to the perf warehouse to make sure our measures can be written to your database