SQLcl: Release 17.4.0 Production on Tue Dec 26 12:42:07 2017

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ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. Set system property 'log4j2.debug' to show Log4j2 internal initialization logging.
Username? (''?) connect sys as sdba
  USER          = connect sys as sdba
  URL           = jdbc:oracle:thin:@localhost:1521/orcl
  Error Message = IO Error: The Network Adapter could not establish the connection
  USER          = connect sys as sdba
  URL           = jdbc:oracle:thin:@localhost:1521/xe
  Error Message = IO Error: The Network Adapter could not establish the connection
Username? (RETRYING) ('"connect sys as sdba"'?)