Unable to start spring boot server

Question

I am new to spring boot and when I try to start my server , I get the following Exception. I understand that this has something to do with dependency conflict, but still unable to figure it out.I am using maven to manage my dependencies.Please help

 Exception in thread "main" java.lang.IllegalArgumentException:  LoggerFactory is not a Logback LoggerContext but Logback is on the  classpath. Either remove Logback or the competing implementation  (class org.slf4j.impl.Log4jLoggerFactory) Object of class  [org.slf4j.impl.Log4jLoggerFactory] must be an instance of class  ch.qos.logback.classic.LoggerContext   at  org.springframework.util.Assert.isInstanceOf(Assert.java:339)  at  org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:93)         at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSensibleDefaults(AbstractLoggingSystem.java:62)         at   org.springframework.boot.logging.AbstractLoggingSystem.beforeInitialize(AbstractLoggingSystem.java:45)     at  org.springframework.boot.logging.logback.LogbackLoggingSystem.beforeInitialize(LogbackLoggingSystem.java:69)     at   org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:135)     at   org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:98)     at   org.springframework.boot.context.event.EventPublishingRunListener.publishEvent(EventPublishingRunListener.java:100)     at   org.springframework.boot.context.event.EventPublishingRunListener.started(EventPublishingRunListener.java:54)     at   org.springframework.boot.SpringApplication.run(SpringApplication.java:276)     at   org.springframework.boot.SpringApplication.run(SpringApplication.java:952)     at   org.springframework.boot.SpringApplication.run(SpringApplication.java:941)     at org.magnum.mobilecloud.video.Application.main(Application.java:30) 

Resolved:Add the following to the POM.xml

    <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-web</artifactId>         <exclusions>             <exclusion>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-starter-tomcat</artifactId>             </exclusion>             <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-log4j</artifactId>     </dependency> 

Answer 1

Excluding logback-classic from spring-boot-starter-web and spring-boot-starter-actuator worked for me

compile("org.springframework.boot:spring-boot-starter-web:1.1.10.RELEASE") {     exclude module: "spring-boot-starter-tomcat"     exclude module: "spring-boot-starter-logging"     exclude module: "logback-classic" } compile("org.springframework.boot:spring-boot-starter-actuator:1.1.10.RELEASE") {     exclude module: "logback-classic" } 

Answer 2

Add this to your build.gradle

configurations.all {         exclude group: 'org.springframework.boot', module: 'spring-boot-starter-tomcat'         exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'         exclude group: 'org.springframework.boot', module: 'logback-classic' }