Dear All,         I created an axis2 project in WSO2 Carbon studio. This application basically running a Drools CEP application.I added drools 5.5.0 in the build path. In the eclipse console the program is running as standalone . But when I deploy this it into the WSO2 AS and execute the service I am getting the error in eclipse console rather than displaying the results.Please help me this is so important from me to resolve. I deployed the drools jar file inside wso2 application server (\wso2as-4.1.2\repository\lib) then also it showing the error.  Here is my error when I execute the service.  ERROR {org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver} -  org/drools/builder/CompositeKnowledgeBuilder java.lang.NoClassDefFoundError: org/drools/builder/CompositeKnowledgeBuilder     at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:38)     at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:56)     at Stream.MyTestCep.main(MyTestCep.java:25)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)     at java.lang.reflect.Method.invoke(Unknown Source)     at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212)     at org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver.invokeBusinessLogic(RPCInOnlyMessageReceiver.java:66)     at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:110)     at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)     at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172)     at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146)     at org.wso2.carbon.core.transports.CarbonServlet.doPost(CarbonServlet.java:199)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)     at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)     at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:111)     at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:67)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)     at org.wso2.carbon.bridge.BridgeServlet.service(BridgeServlet.java:164)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)     at org.wso2.carbon.server.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:154)     at org.wso2.carbon.server.TomcatServer$1.invoke(TomcatServer.java:254)     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399)     at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:396)     at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:356)     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1534)     at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)     at java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: org.drools.builder.CompositeKnowledgeBuilder     at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:443)     at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:405)     at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:393)     at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105)     at java.lang.ClassLoader.loadClass(Unknown Source)     ... 40 more [2013-03-15 10:03:42,384] ERROR {org.apache.axis2.receivers.AbstractMessageReceiver} -  org.apache.axis2.AxisFault: org/drools/builder/CompositeKnowledgeBuilder ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here is my POM.XML <?xml version="1.0" encoding="UTF-8"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">   <modelVersion>4.0.0</modelVersion>   <groupId>Stream.MyTestCep</groupId>   <artifactId>MyTestCep</artifactId>   <version>1.0.0</version>   <packaging>service/axis2</packaging>   <name>MyTestCep</name>   <description>MyTestCep</description>   <build>     <plugins>       <plugin>         <groupId>org.wso2.maven</groupId>         <artifactId>maven-axis2-plugin</artifactId>         <version>2.0.3</version>         <extensions>true</extensions>         <executions>           <execution>             <id>aar</id>             <phase>package</phase>             <goals>               <goal>aar</goal>             </goals>           </execution>         </executions>         <configuration />       </plugin>       <plugin>         <artifactId>maven-eclipse-plugin</artifactId>         <version>2.9</version>         <configuration>           <buildcommands>             <buildcommand>org.eclipse.jdt.core.javabuilder</buildcommand>           </buildcommands>           <projectnatures>             <projectnature>org.wso2.developerstudio.eclipse.axis2.project.nature</projectnature>             <projectnature>org.eclipse.jdt.core.javanature</projectnature>           </projectnatures>         </configuration>       </plugin>     </plugins>   </build>   <repositories>     <repository>       <releases>         <updatePolicy>daily</updatePolicy>         <checksumPolicy>ignore</checksumPolicy>       </releases>       <id>wso2-nexus</id>       <url>http://maven.wso2.org/nexus/content/groups/wso2-public/</url>     </repository>   </repositories>   <pluginRepositories>     <pluginRepository>       <releases>         <updatePolicy>daily</updatePolicy>         <checksumPolicy>ignore</checksumPolicy>       </releases>       <id>wso2-nexus</id>       <url>http://maven.wso2.org/nexus/content/groups/wso2-public/</url>     </pluginRepository>   </pluginRepositories>   <dependencies>     <dependency>       <groupId>org.drools</groupId>       <artifactId>drools-core</artifactId>       <version>5.5.0.Final</version>       <scope>provided</scope>     </dependency>     <dependency>       <groupId>org.drools</groupId>       <artifactId>drools-compiler</artifactId>       <version>5.5.0.Final</version>       <scope>provided</scope>     </dependency>      <dependency>       <groupId>org.drools</groupId>       <artifactId>knowledge-api</artifactId>       <version>5.5.0.Final</version>       <scope>provided</scope>     </dependency>     <dependency>       <groupId>org.slf4j</groupId>       <artifactId>slf4j-nop</artifactId>       <version>1.7.2</version>     </dependency>   </dependencies> </project>