Bond Chan [https://community.jboss.org/people/bondchan921] created the discussion "Re: java.lang.NoSuchMethodError: org.jboss.ejb3.stateless.St" To view the discussion, visit: https://community.jboss.org/message/802275#802275 -------------------------------------------------------------- this post helps me a lot.. we have the same exact error, but our cause is we have 2 jars in the ${jboss_home}/server/default/lib    -jbossws-jboss423.jar    -jbossws-jboss42.jar Our community version is 4.2.3 and EAP version is 4.3, delete the jbossws-jboss423.jar works under EAP version, we bring this issue when migrate to EAP. Interest thing is we also found when this 2 jars present in Solaris OS works, but Linux not,  which should be due to the file sorting order is different by the 2 OS. the command 'ls -l' output On solaris : *        -jbossws-jboss42.jar*             -jbossws-jboss423.jar On Linux *        -jbossws-jboss423.jar*         -jbossws-jboss42.jar -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/802275#802275] Start a new discussion in JBoss Web Services at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]