Hi all: i'm a newbie to drools. when i deployed the guvnor 5.0.1 ,i found there are two kind , web guvnor and standalone guvnor. it seems that there is no diffrence betteen the .war folders in each. it seems that standalone guvnor only means a web guvnor + a jboss as ? is there any special requirement on the version of jboss as ? i found that the jboss as in standalone guvnor folder is jboss 4.2.3.but when i deployed the .war folder of standalone guvnor into jboss eap 4.3,it throw a exception. java.lang.NoClassDefFoundError: org/jgroups/MembershipListener at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) at java.lang.ClassLoader.defineClass(ClassLoader.java:616) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at org.jboss.mx.loading.RepositoryClassLoader.findClassLocally(RepositoryClassLoader.java:679) i know that is because short of jgroup.jar,but i can not find this jar in the standalone guvnor,i goes well. Why ? Waiting for reply！ thanks! best wishes! -- View this message in context: http://n3.nabble.com/A-question-about-web-Guvnor-and-Standalone-Guvnor-tp... Sent from the Drools - User mailing list archive at Nabble.com.