Dropwizard & Log4j2 configuration

[Liliana Santos]

Can someone please help me with instructions on how to configure my Java application (using Dropwizard) to log via Log4j2 ? 

I have custom Log4j2 apppenders already coded that I need to use and Dropwizard seems to use logback by default, I cannot seem to find the exact information of how to override this.  

(1) I have updated my pom.xml with (slf4j-api, log4j-slf4j-impl, log4j-core, log4j-api)

(2) I run my application with : java -jar -Dlog4j.configurationFile=log4j2.xml app-1.0-SNAPSHOT.jar  server configuration.yaml

and I get the exception :

Exception in thread "main" java.lang.IllegalStateException: Unable to acquire the logger context

at io.dropwizard.logging.LoggingUtil.getLoggerContext(LoggingUtil.java:46)

at io.dropwizard.logging.BootstrapLogging.bootstrap(BootstrapLogging.java:45)

at io.dropwizard.logging.BootstrapLogging.bootstrap(BootstrapLogging.java:34)

at io.dropwizard.Application.<init>(Application.java:24) 

....

Thanks in advanced!

[Jochen Schalanda]

Hi Liliana,

Dropwizard is using Logback (http://logback.qos.ch/) as its logging framework of choice. It is non-trivial (and probably not worth the effort) to replace that with another logging framework like log4j 2.

Cheers,

Jochen