Confluence will not start due to ClassNotFoundException: SLF4JBridgeHandler
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
Confluence will not start up.
The following appears in the atlassian-confluence.log:
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INFO: Starting Servlet Engine: Apache Tomcat/6.0.32
Handler error
java.lang.ClassNotFoundException: org.slf4j.bridge.SLF4JBridgeHandler
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.juli.ClassLoaderLogManager.readConfiguration(ClassLoaderLogManager.java:515)
at org.apache.juli.ClassLoaderLogManager.readConfiguration(ClassLoaderLogManager.java:460)
at org.apache.juli.ClassLoaderLogManager$2.run(ClassLoaderLogManager.java:373)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.juli.ClassLoaderLogManager.getClassLoaderInfo(ClassLoaderLogManager.java:370)
at org.apache.juli.ClassLoaderLogManager.getLogger(ClassLoaderLogManager.java:224)
at java.util.logging.LogManager.demandLogger(LogManager.java:389)
at java.util.logging.Logger.getLogger(Logger.java:288)
at org.apache.juli.logging.DirectJDKLog.<init>(DirectJDKLog.java:71)
at org.apache.juli.logging.DirectJDKLog.getInstance(DirectJDKLog.java:178)
at org.apache.juli.logging.LogFactory.getInstance(LogFactory.java:171)
at org.apache.juli.logging.LogFactory.getLog(LogFactory.java:316)
at org.apache.catalina.core.ContainerBase.getLogger(ContainerBase.java:395)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4586)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Nov 20, 2012 9:10:59 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStartCause
Confluence requires a jar file that is missing or corrupted.
Resolution
Download new copy of Confluence matching the installed version from http://www.atlassian.com/software/confluence/download
Verify complete download and extract to new location using archive utility
Copy any customized files to new location. (confluence-init.properties, server.xml, web.xml, etc.)
Startup Confluence.
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