Starts the livy service.
Stops the running instances of the livy service.
livy_service_start(
  version = NULL,
  spark_version = NULL,
  stdout = "",
  stderr = "",
  ...
)livy_service_stop()
The version of livy to use.
The version of spark to connect to.
where output to 'stdout' or 'stderr' should
be sent. Same options as system2.
Optional arguments; currently unused.