Error trying to deepSerialize

We reverse engineered Oracle 10.2.0.4 schema and generated json rest services of the entities. When we hit the rest URL it gives out the following stack trace,

SEVERE: Servlet.service() for servlet [pima-rest-services] in context with path [/pima-rest-services] threw exception [Request processing failed; nested exception is flexjson.JSONException: Error trying to deepSerialize] with root cause
java.sql.SQLException: Unsupported feature
at oracle.jdbc.driver.DatabaseError.throwSqlException (DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException (DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException (DatabaseError.java:208)
at oracle.jdbc.driver.PhysicalConnection.getDBAccessP roperties(PhysicalConnection.java:5115)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at flexjson.BeanProperty.getValue(BeanProperty.java:1 02)
at flexjson.transformer.ObjectTransformer.transform(O bjectTransformer.java:37)
at flexjson.transformer.TransformerWrapper.transform( TransformerWrapper.java:22)
at flexjson.transformer.ObjectTransformer.transform(O bjectTransformer.java:49)
at flexjson.transformer.TransformerWrapper.transform( TransformerWrapper.java:22)
at flexjson.transformer.ObjectTransformer.transform(O bjectTransformer.java:49)
at flexjson.transformer.TransformerWrapper.transform( TransformerWrapper.java:22)
at flexjson.transformer.ObjectTransformer.transform(O bjectTransformer.java:49)
at flexjson.transformer.TransformerWrapper.transform( TransformerWrapper.java:22)
at flexjson.transformer.ObjectTransformer.transform(O bjectTransformer.java:49)
at flexjson.transformer.TransformerWrapper.transform( TransformerWrapper.java:22)
at flexjson.JSONContext.transform(JSONContext.java:73 )
at flexjson.JSONSerializer.serialize(JSONSerializer.j ava:377)
at flexjson.JSONSerializer.serialize(JSONSerializer.j ava:235)
at com.scea.pima.rest.entity.Product_Roo_Json.ajc$int erMethod$com_scea_pima_rest_entity_Product_Roo_Jso n$com_scea_pima_rest_entity_Product$toJson(Product _Roo_Json.aj:16)
at com.scea.pima.rest.entity.Product.toJson(Product.j ava:1)
at com.scea.pima.rest.entity.Product_Roo_Json.ajc$int erMethodDispatch1$com_scea_pima_rest_entity_Produc t_Roo_Json$com_scea_pima_rest_entity_Product$toJso n(Product_Roo_Json.aj)
at com.scea.pima.rest.controller.ProductController_Ro o_Controller_Json.ajc$interMethod$com_scea_pima_re st_controller_ProductController_Roo_Controller_Jso n$com_scea_pima_rest_controller_ProductController$ showJson(ProductController_Roo_Controller_Json.aj: 30)
at com.scea.pima.rest.controller.ProductController.sh owJson(ProductController.java:1)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.web.method.support.InvocableHa ndlerMethod.invoke(InvocableHandlerMethod.java:213 )
at org.springframework.web.method.support.InvocableHa ndlerMethod.invokeForRequest(InvocableHandlerMetho d.java:126)
at org.springframework.web.servlet.mvc.method.annotat ion.ServletInvocableHandlerMethod.invokeAndHandle( ServletInvocableHandlerMethod.java:96)
at org.springframework.web.servlet.mvc.method.annotat ion.RequestMappingHandlerAdapter.invokeHandlerMeth od(RequestMappingHandlerAdapter.java:617)
at org.springframework.web.servlet.mvc.method.annotat ion.RequestMappingHandlerAdapter.handleInternal(Re questMappingHandlerAdapter.java:578)
at org.springframework.web.servlet.mvc.method.Abstrac tHandlerMethodAdapter.handle(AbstractHandlerMethod Adapter.java:80)
at org.springframework.web.servlet.DispatcherServlet. doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet. doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.p rocessRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.d oGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:722)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.HiddenHttpMethodFil ter.doFilterInternal(HiddenHttpMethodFilter.java:7 7)
at org.springframework.web.filter.OncePerRequestFilte r.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.CharacterEncodingFi lter.doFilterInternal(CharacterEncodingFilter.java :88)
at org.springframework.web.filter.OncePerRequestFilte r.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBas e.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(A ccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.p rocess(AbstractHttp11Processor.java:1001)
at org.apache.coyote.AbstractProtocol$AbstractConnect ionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProce ssor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.run Task(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)


Tried Iterable transformer option as suggested in one of the threads which didn't work. We are using 2.1 version of flexjson jar. Any pointers are highly appreciated. Thanks,