Is your project in maven? If you run "mvn dependency:tree" then you should see which dependency gets bad version of jboss-logging to classpath.
Hi Victor and thinksteep, I am also facing the same problem. Please let me know how you were able to resolve this problem. I copied the jboss-client.jar from AS7 but I am still getting the error. Please help.
The only reason I know of that you could get "java.lang.NoSuchMethodError: org.jboss.logging.Logger.tracef(Ljava/lang/String;Ljava/lang/Object;)V" is if you had an old version of JBoss Logging somewhere on your classpath (perhaps buried in another jar). Removing everything from your classpath except jboss-client.jar from AS7 and see if you still have the problem.