The client has noticed the error ORA-24962: connect string could not be parsed, error = 303 in database alert log
This was found in 15.1 but could potentially happen in any version
ORA-24962 means Connect string could not be parsed, there is a syntax error in the connect string.
Commonly when this error is prevalent we see in the jdbc.properties file:
jdbc.dbalias.oracle-thin=@(description=(address=(host=FQDNorIP)(protocol=tcp)(port=1521))(connect_data=(service_name=protect))))
When it should be
jdbc.dbalias.oracle-thin=@(description=(address=(host=FQDNorIP)(protocol=tcp)(port=1521))(connect_data=(service_name=protect)))
one too many ) at the end of the string
Remove the extra ) and restart services in the correct order.