Getting java.lang.reflect.UndeclaredThrowableException when

[vganesh_76]

I am Getting java.lang.reflect.UndeclaredThrowableException when returning Collection obj from stateless bean.

Though I implement the Serializable in my return obj(i.e. Response), I got the exception,
java.lang.reflect.UndeclaredThrowableException
at $Proxy96.readResult(Unknown Source)
at com.ussearch.crm.web.report.ViewResultAction1.execute(ViewResultAction1.java:66)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.ussearch.util.web.filters.GZIPFilter.doFilter(GZIPFilter.java:39)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.UTFDataFormatException: encoded string too long: 270422 bytes
at java.io.DataOutputStream.writeUTF(DataOutputStream.java:347)
at java.io.DataOutputStream.writeUTF(DataOutputStream.java:306)
at org.jboss.serial.util.StringUtil.saveString(StringUtil.java:27)
at org.jboss.serial.objectmetamodel.DataContainer.saveString(DataContainer.java:987)
at org.jboss.serial.objectmetamodel.DataContainer.writeMyself(DataContainer.java:1056)
at org.jboss.serial.objectmetamodel.DataContainer.saveData(DataContainer.java:936)
at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:114)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:287)
at org.jboss.serial.io.MarshalledObject.(MarshalledObject.java:51)
at org.jboss.ejb3.SessionContainer.marshallResponse(SessionContainer.java:211)
at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:223)
at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:55)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
at org.jboss.ejb3.stateless.StatelessClusteredProxy.invoke(StatelessClusteredProxy.java:100)

Can anyone help me to resolve this?

Here is my code

My Stateless bean interface:

public interface ReportManager {

throws EJBException;

 public List<Response> readResult(String orderLineId);
}

My Local interface:

@javax.ejb.Local
public interface ReportManagerLocal extends ReportManager{
}

My Remote interface:

@javax.ejb.Remote
public interface ReportManagerRemote extends ReportManager{
}

My Bean Impl:

@javax.ejb.Stateless
@org.jboss.annotation.ejb.Clustered
public class ReportManagerBean implements ReportManagerLocal, ReportManagerRemote{
 private static org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(ReportManagerBean.class);

 private ReportDAO reportDAO;

 public ReportManagerBean(){
 reportDAO = new ReportDAO();
 }

 public List<Response> readResult(String _orderLineId){
 try{
 return reportDAO.readResult(_orderLineId);
 } catch(Exception ex){
 logger.error("Error in reading result: ", ex);
 throw new EJBException("Error while reading result for line id "+_orderLineId, ex);
 }
 }
}

My Response class:

import java.io.Serializable;

public class Response implements Serializable {
 private String response;

 public Response(){}

 public Response(String _response){
 response = _response;
 }

 public String getResponse(){
 return response;
 }

 public void setResponse(String _response){
 response = _response;
 }
}

[peterj]

Did you see the root cause:

Caused by: java.io.UTFDataFormatException: encoded string too long: 270422 bytes

Looks like the object is too big.

[vganesh_76]

Yes, I am reading huge clob data ...I can pull the same data when I use non-ejb logic ...but this error is thrown in ejb. that's why I serialized my Response object.