here is the entire exception stack

  | javax.ejb.EJBException: java.lang.IllegalArgumentException: Wrong target. 
class webservices.action.BookSearchActionService for public 
webservices.beans.Book[] 
webservices.action.BookSearchActionService.searchBooks(java.lang.String)
  |     at 
org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:77)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:372)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.invokeEndpoint(StatelessContainer.java:727)
  |     at 
org.jboss.wsf.container.jboss50.invocation.InvocationHandlerEJB3.invoke(InvocationHandlerEJB3.java:96)
  |     at 
org.jboss.ws.core.server.ServiceEndpointInvoker.invoke(ServiceEndpointInvoker.java:219)
  |     at 
org.jboss.wsf.stack.jbws.RequestHandlerImpl.processRequest(RequestHandlerImpl.java:474)
  |     at 
org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:295)
  |     at 
org.jboss.wsf.stack.jbws.RequestHandlerImpl.doPost(RequestHandlerImpl.java:205)
  |     at 
org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleHttpRequest(RequestHandlerImpl.java:131)
  |     at 
org.jboss.wsf.common.servlet.AbstractEndpointServlet.service(AbstractEndpointServlet.java:85)
  |     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 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |     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:235)
  |     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
  |     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
  |     at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
  |     at 
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
  |     at 
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
  |     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  |     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
  |     at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
  |     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
  |     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
  |     at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
  |     at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |     at java.lang.Thread.run(Thread.java:595)
  | 

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