spring boot Error Class path contains multiple SLF4J bindings.

yebinianhi — Fri, 14 Jul 2017 01:06:57 GMT

HI, I have a spring boot application. It can run on localhost. but when you deploy a war file on the server. It can not start and generate errors:

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/binye/.m2/repository/ch/qos/logback/logback-classic/1.1.11/logback-classic-1.1.11.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/binye/.m2/repository/org/slf4j/slf4j-log4j12/1.7.25/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]

However, i could not find which one is conflict.

My pom.xml is below:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>


	<groupId>org.evotion.datarepository</groupId>
	<artifactId>datarepository</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>


	<name>datarepository</name>
	<description>Data repository</description>


	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.4.RELEASE</version>
		<!-- <relativePath /> lookup parent from repository -->
	</parent>


	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<!-- <start-class>org.evotion.datarepository.ServletInitializer.java</start-class> -->
		<java.version>1.8</java.version>
	</properties>


	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jersey</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.apache.phoenix</groupId>
			<artifactId>phoenix-core</artifactId>
			<version>4.10.0-HBase-1.2</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>


	</dependencies>


	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

Please helpe me.

Re: spring boot Error Class path contains multiple SLF4J bindings.

elserj — Fri, 14 Jul 2017 01:11:51 GMT

Your application contains two jar files which both contain a slf4j logger implementation. The jar files are listed in the output you provided. Exclude one of these jars from your application's classpath.

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spring boot Error Class path contains multiple SLF4J bindings.

Re: spring boot Error Class path contains multiple SLF4J bindings.