Logging in spring boot

Question

I have tried different ways to configure logging in spring boot and took the help of different blogs but nothing seems to be working for me. I have specified log4j.properties in src/main/reosurces folder and executing the application, It creates the logs for me. BUT when I use external log4j.properties and provide below property while executing my application by jar

-Dlogging.config=/path/to/log4j.properties

The log file is not getting generated. Below is snippet of my build.gradle file.

configurations.all { exclude group: 'com.sun.jdmk', module: 'jmxtools' exclude group: 'com.sun.jmx', module: 'jmxri' exclude group: 'ch.qos.logback', module: 'logback-classic' }

What am I missing here ?

Spring Boot by default uses logback. So providing a log4j.properties isn't really going to help. You can specify log level simply in the application.properties. What is so special you need your own properties fie? — M. Deinum
– M. Deinum, Commented Oct 3, 2016 at 11:14
@M.Deinum I want external logging configuration. I have also tried logging.file and logging.path in application.properties. It is not working. I don't understand what am I missing here ? — rishi
– rishi, Commented Oct 3, 2016 at 13:17

flexguse · Accepted Answer · 2016-10-03 12:08:58Z

Have a look at the spring-boot logging documentation: http://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html

If you want to use log4j in combination with spring-boot, you need to exclude the default logging dependencies and add log4j as your logging framework.

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j2</artifactId> </dependency>

The OP is using gradle, so you should probably use that as an example rather than maven.

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