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From "Claus Ibsen (JIRA)" <>
Subject [jira] [Commented] (AMQ-4735) LinkageError in latest 5.9 snapshot
Date Tue, 24 Sep 2013 06:59:03 GMT


Claus Ibsen commented on AMQ-4735:

Are you running AMQ in a web app or something? Smells like the jetty container has slf4j on
its classpath and it conflicts with slf4j version of AMQ.

AMQ has recently upgraded to slf4j 1.7.x
> LinkageError in latest 5.9 snapshot
> -----------------------------------
>                 Key: AMQ-4735
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>         Environment: activemq-5.9-20130919.101342-100
>            Reporter: Lionel Cons
>         Attachments: activemq.log
> When upgrading a test broker to the latest 5.9 snapshot I get:
> java.lang.LinkageError: loader constraint violation: when resolving method "org.slf4j.impl.StaticLoggerBinder.getLoggerFactory()Lorg/slf4j/ILoggerFactory;"
the class loader (instance of org/eclipse/jetty/webapp/WebAppClassLoader) of the current class,
org/slf4j/LoggerFactory, and the class loader (instance of java/net/URLClassLoader) for resolved
class, org/slf4j/impl/StaticLoggerBinder, have different Class objects for the type org/slf4j/ILoggerFactory
used in the signature

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