SpringBoot Run command is giving an error about duplicate Slf4j library loading

Asked Dec 07 '18 at 10:44

Active Dec 07 '18 at 21:24

Viewed 331 times

I am new to spring-boot. I did "mvn clean install" build got success. Then I am navigate to specific module(sub folder) then I am trying to execute mvn spring-boot: run then I am getting below error.

LoggerFactory is not a Logback LoggerContext but Logback is on the classpath. Either remove Logback or the competing implementation (class org.slf4j.impl.Log4jLoggerFactory loaded from file:/root/.m2/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.jar). If you are using Weblogic you will need to add 'org.slf4j' to prefer-application-packages in WEB-INF/weblogic.xml Object of class [org.slf4j.impl.Log4jLoggerFactory] must be an instance of class ch.qos.logback.classic.LoggerContext

Any help is much appreciated.

edited Dec 07 '18 at 21:24

nixgadget

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asked Dec 07 '18 at 10:44

Parthipan Subramaniam

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What logger are you using? – Ulad Dec 07 '18 at 10:54
@vlad324 I am using slf4j – Parthipan Subramaniam Dec 07 '18 at 12:01
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Find out your dependencies using `mvn dependency:tree`. That will indicate whats loading the duplicate slf4j lib. – nixgadget Dec 07 '18 at 12:07
@ParthipanSubramaniam do you have some configuration for logger in your app? – Ulad Dec 07 '18 at 12:15
Thank you so much guys I have analyzed maven dependcy tree and I came to know org.apache.phoenix is internally calling slf4j. I have excluded it :) – Parthipan Subramaniam Dec 07 '18 at 13:05

SpringBoot Run command is giving an error about duplicate Slf4j library loading

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