Spring Boot - no log file written (logging.file is not respected)

Question

I use Spring Boot and want it to write log output to a file.

According to the docs, this is simply done by setting

logging.file=filename.log
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Answer 1

Sorry for the late reply. It seems spring's logger reads the property from its own classpath.Due to precedence, it's not respecting the properties supplied.

Some tricks to get around:

1. In main class set the property variable using springApplication.setDefaultProperties(properties); like this

public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(MainClass.class);
        Properties properties = new Properties();
        properties.put("logging.file", logDirectory);
        springApplication.setDefaultProperties(properties);
        springApplication.run(args);
    }

2. Pass the property as JVM parameter -Dlogging.file=/location/output.log.

Both of the above are not the best ones as in order to define other logging properties they also should follow the same way.

Solution

Define a property file and put all you logging configurations in that and specify the file in -Dspring.config.location. This is a derivation of my other problem and this is how I resolved that. check that out in order to know other solutions that I've tried and their challenges.