java - How to enable debugging in Log4j using .properties file and maven? -

i trying enable printing debugging information maven project. added log4j dependency pom.xml , added log4j.properties log4j2.properties rootloger=debug, sdout src/main/resources folder. in desired class, initiate logger in desired class 'org.pakage1.classa' , add logger.debug() lines nothing shown in consul. when checked logger.isdebugenabled() returns false

• pom.xml

  <dependencies> ..... <dependency>     <groupid>org.slf4j</groupid>     <artifactid>slf4j-log4j12</artifactid>     <version>1.7.25</version> </dependency> 

• log4j.properties , log4j2

  log4j.debug=true log4j.rootlogger=debug, stdout  log4j.appender.stdout.threshold=debug log4j.appender.stdout=org.apache.log4j.consoleappender log4j.appender.stdout.layout=org.apache.log4j.patternlayout log4j.appender.stdout.layout.conversionpattern=%-5p %d [%t] %c{1} - %m%n 

  and step tried adding

  log4j.logger.extendedsldnf.extendedsldnfevaluator=debug  

  but did not work.

  package package1; ...... class classa{     private logger logger = loggerfactory.getlogger(getclass());     ......     public static void main(string []args){            logger.debug("message");     }   } 

knowing getting warning

slf4j: class path contains multiple slf4j bindings. slf4j: actual binding of type [ch.qos.logback.classic.util.contextselectorstaticbinder] 

also project has other sub-modules have logging enabled , debugging messages works when stated in log4j.properties file

is there missing? how check if there conflicting?

added log4j.properties log4j2.properties

the first 1 log4j 1, second 1 log4j 2. declaring both not way solve problem.
use 1 matches actual log4j version.

slf4j: class path contains multiple slf4j bindings. slf4j: actual binding of type [ch.qos.logback.classic.util.contextselectorstaticbinder]

indeed, problem rather clear : want use log4j implementation slf4j binding but have @ runtime in classpath @ least 1 slf4j binding. here mentioned contextselectorstaticbinder logback binding.
you have have in classpath @ runtime single implementation/binding slf4j.

to solve problem, rather simple.
use maven, propose execute mvn dependency:tree command agreggator pom of application or if have not agreggator pom, pom packages application.
command write output dependencies (including transitive dependencies pulled pom).

it output :

[info] --- maven-dependency-plugin:2.10:tree (default-cli) @ test-spring-boot --- [info] test-spring-boot:test-spring-boot:jar:0.0.1-snapshot [info] \- org.springframework.boot:spring-boot-starter-web:jar:1.4.4.release:compile [info]    +- org.springframework.boot:spring-boot-starter:jar:1.4.4.release:compile [info]    |  +- org.springframework.boot:spring-boot:jar:1.4.4.release:compile [info]    |  +- org.springframework.boot:spring-boot-autoconfigure:jar:1.4.4.release:compile [info]    |  +- org.springframework.boot:spring-boot-starter-logging:jar:1.4.4.release:compile [info]    |  |  +- ch.qos.logback:logback-classic:jar:1.1.9:compile [info]    |  |  |  +- ch.qos.logback:logback-core:jar:1.1.9:compile [info]    |  |  |  \- org.slf4j:slf4j-api:jar:1.7.22:compile [info]    |  |  +- org.slf4j:jcl-over-slf4j:jar:1.7.22:compile [info]    |  |  +- org.slf4j:jul-to-slf4j:jar:1.7.22:compile [info]    |  |  \- org.slf4j:log4j-over-slf4j:jar:1.7.22:compile [info]    |  +- org.springframework:spring-core:jar:4.3.6.release:compile [info]    |  \- org.yaml:snakeyaml:jar:1.17:runtime [info]    +- org.springframework.boot:spring-boot-starter-tomcat:jar:1.4.4.release:compile [info]    |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.11:compile [info]    |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.11:compile [info]    |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.11:compile [info]    +- org.hibernate:hibernate-validator:jar:5.2.4.final:compile [info]    |  +- javax.validation:validation-api:jar:1.1.0.final:compile [info]    |  +- org.jboss.logging:jboss-logging:jar:3.3.0.final:compile [info]    |  \- com.fasterxml:classmate:jar:1.3.3:compile [info]    +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.6:compile [info]    |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.6:compile [info]    |  \- com.fasterxml.jackson.core:jackson-core:jar:2.8.6:compile [info]    +- org.springframework:spring-web:jar:4.3.6.release:compile [info]    |  +- org.springframework:spring-aop:jar:4.3.6.release:compile [info]    |  +- org.springframework:spring-beans:jar:4.3.6.release:compile [info]    |  \- org.springframework:spring-context:jar:4.3.6.release:compile [info]    \- org.springframework:spring-webmvc:jar:4.3.6.release:compile [info]       \- org.springframework:spring-expression:jar:4.3.6.release:compile 

you have identify logback dependency pulled.
once having identified it, remove dependency if dependency explicitly declared our own pom.
if transitive dependency, use exclusion dependency mechanism of maven.