Why Does My Headless Java Command Line Build Always Complete with No Output?

What causes a headless Java command line build to complete with no output?

java -jar myapp.jar

A headless Java command line build can often complete without producing any output due to several reasons ranging from application-specific issues to environment configurations. Understanding these factors can help diagnose the situation effectively.

Logger logger = Logger.getLogger(MyApp.class.getName());
logger.info("Application has started successfully.");

Causes

• The application does not produce any console output.
• The logging configuration might not be set to display output in the console.
• The build environment lacks proper configuration or permissions.
• The Java application exited successfully, with no errors to report.

Solutions

• Check the application code to ensure it is supposed to produce output.
• Review the logging configuration and set it to 'DEBUG' or 'INFO' levels to capture more logs.
• Verify that the command is executed in a proper environment where it has the requisite permissions.
• Use a logging framework like Log4j or SLF4J to manage output effectively.

Mistake: Not checking the logging configuration.

Solution: Ensure your logging framework is set up correctly to output logs to the console.

Mistake: Assuming that build completion logs errors without them being present.

Solution: Inspect the application logs in detail, even if it appears successful.