JBoss多个SLF4J绑定错误

Question

I am using JBoss 6 and am getting a multiple versions error when trying to run my application:

ERROR [STDERR] SLF4J: Class path contains multiple SLF4J bindings.

ERROR [STDERR] SLF4J: Found binding in [vfs:/C:/jboss-6.0.0.Final/common/lib/slf4j-jboss-logmanager.jar/org/slf4j/impl/StaticLoggerBinder.class]

ERROR [STDERR] SLF4J: Found binding in [vfs:/C:/jboss-6.0.0.Final/server/default/deploy/newsroom-integration-persistence-service.war/WEB-INF/lib/slf4j-log4j12-1.6.1.jar/org/slf4j/impl/StaticLoggerBinder.class]

My application declares slf4j-log4j12 in the pom but not slf4j-jboss-logmanager so have no idea why its trying to use this. This is the pom:

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>${org.slf4j-version}</version>
    <scope>runtime</scope>
</dependency>

Any ideas on how to resolve this? It seems to be causing 'DEBUG' level errors to be written to the console even when the level-name set in jboss-logging.xml is set to INFO!!

Answer 1

It doesn't matter what you declare in your pom.xml , JBoss is going to load what's in its common classpath. If you prefer to use the log4j binding, then you have to remove C:/jboss-6.0.0.Final/common/lib/slf4j-jboss-logmanager.jar . This is the approach recommended by Alfresco . Quoting:

You may see the following errors during the startup:

2011-10-12 10:47:21,505 ERROR [STDERR] (main) SLF4J: Class path contains multiple SLF4J bindings.

2011-10-12 10:47:21,505 ERROR [STDERR] (main) SLF4J: Found binding in [vfszip:/usr/local/jeap51/jboss- as/common/lib/slf4j-jboss-logging.jar/org/slf4j/impl/StaticLoggerBinder.class]

2011-10-12 10:47:21,505 ERROR [STDERR] (main) SLF4J: Found binding in [vfszip:/usr/local/jeap51/jboss -as/server/W51J51I1/deploy/alfresco.war/WEB-INF/lib/slf4j-log4j12-1.5.11.jar/org/slf4j/impl/StaticLoggerBinder.class]

2011-10-12 10:47:21,505 ERROR [STDERR] (main) SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.

To avoid these errors, remove the /common/lib/slf4j-jboss-logging.jar file.