[rules-users] Error occured when replacing commons-lang2.4 with commons-lang3-3.1 in Guvnor 5.4.0 Final

Hi, All I am using Guvnor 5.4.0 Final with Tomcat 6.0.35. And I wanted to replace commons-lang2.4 with commons- lang3-3.1, so I overwrote the commons-lang2.4 jar file in Guvnor's WEB-INF/lib directory with commons- lang3-3.1.jar. However an error like follows occured: Service method 'public abstract long org.drools.guvnor.client.rpc.AssetService.getAssetCount(org.drools.guvnor.client.rpc.AssetPageRequest) throws com.google.gwt.user.client.rpc.SerializationException' threw an unexpected exception: java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils org/apache/commons/lang/StringUtils I have restarted Guvnor. Any suggestion will be appreciated, thank you very much. -- View this message in context: http://drools.46999.n3.nabble.com/Error-occured-when-replacing-commons-la... Sent from the Drools: User forum mailing list archive at Nabble.com.