What causes StarTeam Server to shutdown with the error "ORA-12571: TNS:packet writer failure"?
StarTeam Server might shutdown with the error "ORA-12571: TNS:packet writer failure", if StarTeam Oracle database connectivity is interrupted. This is an Oracle generated error message which indicates a network error during data transmission. Please check with your Network Administrator if there was a network failure during the time of the error message.
Another reason for this error could be that Oracle is shutting down, as detailed article
Why does the server log report the error, "Msg = ORA-01089: immediate shutdown in progress - no operations are permitted"?.