这可能是一个重复的问题,但我无法弄清楚绑定碰撞在哪里。我有Spring Boot 1.2.6.RELEASE
服务,运行时我收到此错误:
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/jscherman/.m2/repository/ch/qos/logback/logback-classic/1.1.3/logback-classic-1.1.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/jscherman/.m2/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.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]
这是mvn dependency:tree
输出
[INFO] com.myenterprise:product-manager:jar:0.0.1-SNAPSHOT
[INFO] +- com.myenterprise.product:myproject-api:jar:0.0.1-SNAPSHOT:compile
[INFO] +- com.myenterprise.product:myproject-core:jar:0.0.1-SNAPSHOT:compile
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.2.6.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-tomcat:jar:1.2.6.RELEASE:compile
[INFO] | | +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.0.26:compile
[INFO] | | +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.0.26:compile
[INFO] | | +- org.apache.tomcat.embed:tomcat-embed-logging-juli:jar:8.0.26:compile
[INFO] | | \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.0.26:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.4.6:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-annotations:jar:2.4.6:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.4.6:compile
[INFO] | +- org.hibernate:hibernate-validator:jar:5.1.3.Final:compile
[INFO] | | +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging:jar:3.1.3.GA:compile
[INFO] | | \- com.fasterxml:classmate:jar:1.0.0:compile
[INFO] | +- org.springframework:spring-core:jar:4.1.7.RELEASE:compile
[INFO] | +- org.springframework:spring-web:jar:4.1.7.RELEASE:compile
[INFO] | | \- org.springframework:spring-aop:jar:4.1.7.RELEASE:compile
[INFO] | \- org.springframework:spring-webmvc:jar:4.1.7.RELEASE:compile
[INFO] | \- org.springframework:spring-expression:jar:4.1.7.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-data-jpa:jar:1.2.6.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-aop:jar:1.2.6.RELEASE:compile
[INFO] | | +- org.aspectj:aspectjrt:jar:1.8.6:compile
[INFO] | | \- org.aspectj:aspectjweaver:jar:1.8.6:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-jdbc:jar:1.2.6.RELEASE:compile
[INFO] | | +- org.springframework:spring-jdbc:jar:4.1.7.RELEASE:compile
[INFO] | | +- org.apache.tomcat:tomcat-jdbc:jar:8.0.26:compile
[INFO] | | | \- org.apache.tomcat:tomcat-juli:jar:8.0.26:compile
[INFO] | | \- org.springframework:spring-tx:jar:4.1.7.RELEASE:compile
[INFO] | +- org.hibernate:hibernate-entitymanager:jar:4.3.11.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging-annotations:jar:1.2.0.Beta1:compile
[INFO] | | +- org.hibernate:hibernate-core:jar:4.3.11.Final:compile
[INFO] | | | +- antlr:antlr:jar:2.7.7:compile
[INFO] | | | \- org.jboss:jandex:jar:1.1.0.Final:compile
[INFO] | | +- dom4j:dom4j:jar:1.6.1:compile
[INFO] | | | \- xml-apis:xml-apis:jar:1.0.b2:compile
[INFO] | | +- org.hibernate.common:hibernate-commons-annotations:jar:4.0.5.Final:compile
[INFO] | | +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] | | \- org.javassist:javassist:jar:3.18.1-GA:compile
[INFO] | +- javax.transaction:javax.transaction-api:jar:1.2:compile
[INFO] | +- org.springframework:spring-orm:jar:4.1.7.RELEASE:compile
[INFO] | +- org.springframework.data:spring-data-jpa:jar:1.7.3.RELEASE:compile
[INFO] | | +- org.springframework.data:spring-data-commons:jar:1.9.3.RELEASE:compile
[INFO] | | \- org.slf4j:slf4j-api:jar:1.7.12:compile
[INFO] | \- org.springframework:spring-aspects:jar:4.1.7.RELEASE:compile
[INFO] +- mysql:mysql-connector-java:jar:5.1.36:compile
[INFO] +- org.flywaydb:flyway-core:jar:3.1:compile
[INFO] +- org.springframework.security.oauth:spring-security-oauth2:jar:2.0.7.RELEASE:compile
[INFO] | +- org.springframework:spring-beans:jar:4.1.7.RELEASE:compile
[INFO] | +- org.springframework:spring-context:jar:4.1.7.RELEASE:compile
[INFO] | +- org.springframework.security:spring-security-core:jar:3.2.8.RELEASE:compile
[INFO] | | \- aopalliance:aopalliance:jar:1.0:compile
[INFO] | +- org.springframework.security:spring-security-config:jar:3.2.8.RELEASE:compile
[INFO] | +- org.springframework.security:spring-security-web:jar:3.2.8.RELEASE:compile
[INFO] | +- commons-codec:commons-codec:jar:1.6:compile
[INFO] | \- org.codehaus.jackson:jackson-mapper-asl:jar:1.9.13:compile
[INFO] | \- org.codehaus.jackson:jackson-core-asl:jar:1.9.13:compile
[INFO] +- org.springframework.boot:spring-boot-starter:jar:1.2.6.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot:jar:1.2.6.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-autoconfigure:jar:1.2.6.RELEASE:compile
[INFO] | \- org.yaml:snakeyaml:jar:1.14:compile
[INFO] +- org.springframework.boot:spring-boot-starter-log4j:jar:1.2.6.RELEASE:compile
[INFO] | +- org.slf4j:jcl-over-slf4j:jar:1.7.12:compile
[INFO] | +- org.slf4j:jul-to-slf4j:jar:1.7.12:compile
[INFO] | +- org.slf4j:slf4j-log4j12:jar:1.7.12:compile
[INFO] | \- log4j:log4j:jar:1.2.17:compile
[INFO] \- org.springframework.boot:spring-boot-starter-test:jar:1.2.6.RELEASE:compile
[INFO] +- junit:junit:jar:4.12:compile
[INFO] +- org.mockito:mockito-core:jar:1.10.19:compile
[INFO] | \- org.objenesis:objenesis:jar:2.1:runtime
[INFO] +- org.hamcrest:hamcrest-core:jar:1.3:compile
[INFO] +- org.hamcrest:hamcrest-library:jar:1.3:compile
[INFO] \- org.springframework:spring-test:jar:4.1.7.RELEASE:compile
所以,显然问题是logback
仍然在类路径中,但我在输出中找不到它,所以我不知道问题出在哪里。
你能发现错误吗?非常感谢您的帮助
仅当我将服务器作为Spring Boot Application运行时才会发生这种情况。如果我将它作为java应用程序运行,错误就消失了......任何想法?
答案 0 :(得分:21)
我遇到了完全相同的问题,只能看到来自spring boot的依赖项。它还引入了log4j-over-slf4j,这与我自己对slf4j-log4j12的要求发生了冲突。通过添加以下排除项解决。这更具体,不包括spring boot logging。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<artifactId>logback-classic</artifactId>
<groupId>ch.qos.logback</groupId>
</exclusion>
<exclusion>
<artifactId>log4j-over-slf4j</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
答案 1 :(得分:3)
删除引入spring-boot-starter-log4j
的{{1}}依赖项,如果您有一些依赖于log4j的代码,我认为您应该使用slf4j-log4j12
。请参阅here以获得区别。
答案 2 :(得分:2)
由于所有先前的答案都未能成功使log4j2正常运行(至少对我而言不是),因此我在https://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html#howto-configure-log4j-for-logging找到了解决方案。基本上,从org.springframework.boot:spring-boot-starter-logging
中排除org.springframework.boot:spring-boot-starter
并在您的org.springframework.boot:spring-boot-starter-log4j2
中添加pom.xml
作为依赖项。
答案 3 :(得分:2)
此页面上的所有上述答案都是正确的,并且指向相同的方向,但是此过程非常具有挑战性且麻烦。
我强烈建议您使用或使用标准插件,例如Maven helper plugin
答案 4 :(得分:1)
您在类路径上使用logback.xml&amp;在你的pom上有spring-boot-starter-log4j:jar,这就是为什么要使用 StaticLoggerBinder 的冲突。
SLF4J: Found binding in [jar:file:/home/jscherman/.m2/repository/ch/qos/logback/logback-classic/1.1.3/logback-classic-1.1.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/jscherman/.m2/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
请从您的pom中删除其中一个日志记录库,例如spring-boot-starter-log4j以消除冲突。
答案 5 :(得分:1)
Maven Helper 插件在快速可视化依赖关系图,识别冲突并通过简单的单击内联解决冲突方面非常有用。
答案 6 :(得分:1)
如果将来其他人遇到相同的问题,请发布此消息。
在大型项目中,将存在多个依赖关系,并且将其中一个或两个排除在外可能并不总是有效。就我而言,我也无法在我要运行的项目的依赖关系树中找到logback-classic
。对我来说,原因是
logback-classic
。解决方案:
logback-classic
或slf4j-api
slf4j-api
的排除项放在依赖项中。slf4-api
,而您只需要对logback-classic
重复相同的过程,直到它完全脱离依赖关系树和其他内部项目为止。slf4j-api
。答案 7 :(得分:0)
此错误是由类路径中有多个SLF4J实现引起的。 SLF4J是各种日志框架(例如log4j或logback)的抽象,它通过静态方法在编译阶段检测实现。
从你的依赖:树,我只找到log4j,没有与logback相关的jar
[INFO] +- org.springframework.boot:spring-boot-starter-log4j:jar:1.2.6.RELEASE:compile
[INFO] | +- org.slf4j:jcl-over-slf4j:jar:1.7.12:compile
[INFO] | +- org.slf4j:jul-to-slf4j:jar:1.7.12:compile
[INFO] | +- org.slf4j:slf4j-log4j12:jar:1.7.12:compile
[INFO] | \- log4j:log4j:jar:1.2.17:compile
您应首先尝试运行maven - update项目,然后再次检查。
答案 8 :(得分:0)
当要使用log4j进行日志记录并排除默认的logback实现时,请添加此依赖项(如果尚不存在),或添加排除子句。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>