java.lang.IllegalArgumentException

[MOHAK R]

We are using Gwt with struts and hibernate.

Few of my customers are facing an issue.

This is my call stack, hope you could help me 

          [TP-Processor15] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/application] - Exception while dispatching incoming RPC call

        com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.company.cm.ui.client.model.group.GroupData com.company.cm.ui.client.GroupService.getGroup(java.lang.Integer) throws com.company.cm.ui.client.exception.ServiceException' threw an unexpected exception: java.lang.IllegalArgumentException: [Assertion failed] - this collection must not be empty: it must contain at least 1 element

                at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)

                at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)

                at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:551)

                at com.company.cm.ui.server.GwtSpringController.processCall(GwtSpringController.java:107)

                at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)

                at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)

                at com.company.cm.ui.server.GwtSpringController.handleRequest(GwtSpringController.java:88)

                at sun.reflect.GeneratedMethodAccessor944.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

                at java.lang.reflect.Method.invoke(Unknown Source)

                at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)

                at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

                at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)

                at com.sun.proxy.$Proxy122.handleRequest(Unknown Source)

                at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)

                at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)

                at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)

                at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)

                at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)

                at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)

                at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

                at com.company.cm.ui.server.i18n.filter.I18nFilter.doFilter(I18nFilter.java:37)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

                at com.company.cm.ui.server.header.filter.ExpiresHeaderFilter.doFilter(ExpiresHeaderFilter.java:65)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

                at com.integrien.alive.ui.util.MainPortalFilter.doFilter(MainPortalFilter.java:255)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

                at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235)

                at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)

                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

                at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

                at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

                at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)

                at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

                at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

                at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

                at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)

                at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)

                at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)

                at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:776)

                at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:705)

                at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:898)

                at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)

                at java.lang.Thread.run(Unknown Source)

        Caused by: java.lang.IllegalArgumentException: [Assertion failed] - this collection must not be empty: it must contain at least 1 element

                at org.springframework.util.Assert.notEmpty(Assert.java:268)

                at org.springframework.util.Assert.notEmpty(Assert.java:280)

                at com.integrien.alive.vm.manager.group.GroupManagerImpl.getGroup(GroupManagerImpl.java:629)

                at sun.reflect.GeneratedMethodAccessor1755.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

                at java.lang.reflect.Method.invoke(Unknown Source)

                at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)

                at org.springframework.aop.interceptor.CustomizableTraceInterceptor.invokeUnderTrace(CustomizableTraceInterceptor.java:256)

                at org.springframework.aop.interceptor.AbstractTraceInterceptor.invoke(AbstractTraceInterceptor.java:110)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

                at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

                at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)

                at com.sun.proxy.$Proxy107.getGroup(Unknown Source)

                at com.company.cm.ui.server.GroupServiceImpl.getGroup(GroupServiceImpl.java:172)

                at sun.reflect.GeneratedMethodAccessor1759.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

                at java.lang.reflect.Method.invoke(Unknown Source)

                at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)

                at org.springframework.aop.interceptor.CustomizableTraceInterceptor.invokeUnderTrace(CustomizableTraceInterceptor.java:256)

                at org.springframework.aop.interceptor.AbstractTraceInterceptor.invoke(AbstractTraceInterceptor.java:110)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

                at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)

                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

                at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)

                at com.sun.proxy.$Proxy122.getGroup(Unknown Source)

                at sun.reflect.GeneratedMethodAccessor2580.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

                at java.lang.reflect.Method.invoke(Unknown Source)

                at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)

                ... 51 more