Oracle CDC instance has started but then goes to status LOGGER with status message "Trying to retrieve next change record from source database".

The trace shows entries
  • type ERROR ORACDC514E:Failed to add redo log with sequence xxx
    • where xxx is a value one more than the current log sequence on the Oracle database

  • type TRACE ORACDC000T:Error encountered at set position - EOF simulated
  • type ERROR ORACDC511E:The Oracle CDC failed to position

What causes this?