This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Shell 3.4.0!

Logging

By default, a Spring Boot application logs messages into a console which at minimum is annoying and may also mix output from a shell commands. Fortunately, there is a simple way to instruct logging changes via Spring Boot properties.

To completely silence console logging, set the console’s logging pattern to an empty value:

logging:
  pattern:
    console:

If you need log from a shell then write those into a file:

logging:
  file:
    name: shell.log

If you need different log levels:

logging:
  level:
    org:
      springframework:
        shell: debug

Passing configuration properties as command line options is not supported, but you can use other ways supported by Spring Boot, for example:

$ java -Dlogging.level.root=debug -jar demo.jar
$ LOGGING_LEVEL_ROOT=debug java -jar demo.jar

In a GraalVM image, settings are locked during compilation which means you can’t change log levels at runtime.