oracle 12c alert log error
An Internal Routine Has Requested A Dump Of Selected Redo - Message Appears In Alert Log (Doc ID 2295361.1)


  ...
  
  SOLUTION
  
  You can ignore the message related to redo log if there is no error
  along with this information. Please note that for now, there is no way
  to disable the message by setting any event,  because these
  informative messages are useful in some cases if something goes wrong.
  
  ...