Spring-Boot logging with log4j2?

Question

I'm using spring-boot-starter, and would like to configure log4j2.xml to log asynchron + different content to different logfiles.

I created the log4j2 file, but Spring still uses the spring-boot default logging. How can I switch the logging?

Answer 1

I've a better way:

1. Exclude logback logger:

   <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>
   

2. Add log4j2 boot starter:

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-log4j2</artifactId>
   </dependency>
   

Source: http://docs.spring.io/spring-boot/docs/1.5.1.RELEASE/reference/htmlsingle/#howto-configure-log4j-for-logging

Enjoy!

Answer 2

Try this:

1. Exclude spring-boot-starter-logging e.g.

   <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>
   

2. Add dependencies for your logging interface e.g. slf4j

   <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-slf4j-impl</artifactId>
       <version>2.0.2</version>
   </dependency>
   

3. Add other logging implementations pointing to chosen logging interface e.g.

   <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>jcl-over-slf4j</artifactId>
   </dependency>
   <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>jul-to-slf4j</artifactId>
   </dependency>
   <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>log4j-over-slf4j</artifactId>
   </dependency>
   

4. Add your target logging implementation e.g.

   <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-api</artifactId>
       <version>2.0.2</version>
   </dependency>
   <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-core</artifactId>
       <version>2.0.2</version>
   </dependency>
   

And it should work.

Answer 3

This is what worked for me. Having two additional exclusions. Else Application was not picking up log4j and was had conflict

Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.0.0</version>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
        <exclusion>
            <artifactId>logback-classic</artifactId>
            <groupId>ch.qos.logback</groupId>
        </exclusion>
        <exclusion>
            <artifactId>log4j-over-slf4j</artifactId>
            <groupId>org.slf4j</groupId>
        </exclusion>            
    </exclusions>           
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>