Jenkins Artifactory plugin - SLF4J: Class path contains multiple SLF4J bindings

We found this issue after migrating our jenkins and artifactory servers:

===[JENKINS REMOTING CAPACITY]===channel started SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/home/krfsadmin/.jenkins/cache/artifactory-plugin/2.2.2/slf4j-jdk14-1.6.2.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/krfsadmin/.jenkins/cache/jars/3E/F61A988E582517AA842B98FA54C586.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. Failed to instantiate SLF4J LoggerFactory Reported exception: java.lang.NoClassDefFoundError: org/slf4j/spi/LoggerFactoryBinder at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:792) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:386) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromParent(ClassRealm.java:405) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:46) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at java.lang.ClassLoader.loadClass(ClassLoader.java:411) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:129) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:302) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:288) at hudson.maven.Maven3Builder$MavenExecutionListener.(Maven3Builder.java:352) at hudson.maven.Maven3Builder.call(Maven3Builder.java:114) at hudson.maven.Maven3Builder.call(Maven3Builder.java:69) at hudson.remoting.UserRequest.perform(UserRequest.java:118) at hudson.remoting.UserRequest.perform(UserRequest.java:48) at hudson.remoting.Request$2.run(Request.java:328) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Caused by: java.lang.ClassNotFoundException: org.slf4j.spi.LoggerFactoryBinder at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) ... 35 more channel stopped ERROR: Failed to parse POMs java.io.IOException: Remote call on Channel to Maven [/opt/jdk/bin/java, -Dfile.encoding=UTF-8, -Dm3plugin.lib=/opt/jenkins/plugins/artifactory/WEB-INF/lib, -cp, /home/krfsadmin/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-agent-1.5.jar:/opt/maven/boot/plexus-classworlds-2.x.jar, org.jvnet.hudson.maven3.agent.Maven3Main, /opt/maven, /opt/apache-tomcat-7.0.52/webapps/jenkins/WEB-INF/lib/remoting-2.41.jar, /home/krfsadmin/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-1.5.jar, /home/krfsadmin/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.5.jar, 44464] failed at hudson.remoting.Channel.call(Channel.java:748) at hudson.maven.ProcessCache$MavenProcess.call(ProcessCache.java:160) at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:843) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:518) at hudson.model.Run.execute(Run.java:1706) at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:529) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:231) Caused by: java.lang.NoClassDefFoundError: org/slf4j/spi/LoggerFactoryBinder at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:792) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:386) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromParent(ClassRealm.java:405) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:46) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at java.lang.ClassLoader.loadClass(ClassLoader.java:411) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:129) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:302) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:288) at hudson.maven.Maven3Builder$MavenExecutionListener.(Maven3Builder.java:352) at hudson.maven.Maven3Builder.call(Maven3Builder.java:114) at hudson.maven.Maven3Builder.call(Maven3Builder.java:69) at hudson.remoting.UserRequest.perform(UserRequest.java:118) at hudson.remoting.UserRequest.perform(UserRequest.java:48) at hudson.remoting.Request$2.run(Request.java:328) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Caused by: java.lang.ClassNotFoundException: org.slf4j.spi.LoggerFactoryBinder at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) ... 35 more [ci-game] evaluating rule: Build result

Not sure if the cache directory was copied over but the bottom line is that the duplication of jar files can be eliminated of course when as we eliminate any duplication:

mv ~/.jenkins/cache/artifactory-plugin/2.2.2/slf4j-jdk14-1.6.2.jar ~/