ERROR com.vaadin.data.util.converter.Converter$ConversionException: Unable

Please, any suggestions as to why this occured and the solution is greatly appreciated.

I am at step 7 of
https://vaadin.com/docs/-/part/framework/tutorial.html

7. Connecting the form to the application

A screen shot is included that displays the error. I have tried four times in following the video tutorial USING Vaadin 7 Project.

The log is below:

Mar 23, 2017 11:37:33 AM com.vaadin.server.DefaultErrorHandler doDefault
SEVERE:
com.vaadin.data.Buffered$SourceException
    at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:667)
    at com.vaadin.data.fieldgroup.FieldGroup.bind(FieldGroup.java:274)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.bind(BeanFieldGroup.java:155)
    at com.vaadin.data.fieldgroup.FieldGroup.buildAndBindMemberFields(FieldGroup.java:1015)
    at com.vaadin.data.fieldgroup.FieldGroup.bindMemberFields(FieldGroup.java:860)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.createAndBindFields(BeanFieldGroup.java:266)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.bindFieldsUnbuffered(BeanFieldGroup.java:235)
    at com.webapp.DuelChem_Inventory.CustomerForm.setCustomer(CustomerForm.java:46)
    at com.webapp.DuelChem_Inventory.MainUI.lambda$2(MainUI.java:87)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:200)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:163)
    at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1015)
    at com.vaadin.ui.Grid.fireSelectionEvent(Grid.java:6022)
    at com.vaadin.ui.Grid$AbstractSelectionModel.fireSelectionEvent(Grid.java:1471)
    at com.vaadin.ui.Grid$SingleSelectionModel.select(Grid.java:1538)
    at com.vaadin.ui.Grid$SingleSelectionModel$1.select(Grid.java:1510)
    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 com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:119)
    at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:432)
    at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:404)
    at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:273)
    at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
    at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41)
    at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1422)
    at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:379)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1524)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1480)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
Caused by: com.vaadin.data.util.converter.Converter$ConversionException: Unable to convert value of type java.time.LocalDate to presentation type class java.util.Date. No converter is set and the types are not compatible.
    at com.vaadin.data.util.converter.ConverterUtil.convertFromModel(ConverterUtil.java:118)
    at com.vaadin.ui.AbstractField.convertFromModel(AbstractField.java:738)
    at com.vaadin.ui.AbstractField.convertFromModel(AbstractField.java:723)
    at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:659)
    ... 55 more

Mar 23, 2017 11:45:07 AM com.vaadin.server.DefaultErrorHandler doDefault
SEVERE:
com.vaadin.data.Buffered$SourceException
    at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:667)
    at com.vaadin.data.fieldgroup.FieldGroup.bind(FieldGroup.java:274)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.bind(BeanFieldGroup.java:155)
    at com.vaadin.data.fieldgroup.FieldGroup.buildAndBindMemberFields(FieldGroup.java:1015)
    at com.vaadin.data.fieldgroup.FieldGroup.bindMemberFields(FieldGroup.java:860)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.createAndBindFields(BeanFieldGroup.java:266)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.bindFieldsUnbuffered(BeanFieldGroup.java:235)
    at com.webapp.DuelChem_Inventory.CustomerForm.setCustomer(CustomerForm.java:46)
    at com.webapp.DuelChem_Inventory.MainUI.lambda$2(MainUI.java:87)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:200)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:163)
    at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1015)
    at com.vaadin.ui.Grid.fireSelectionEvent(Grid.java:6022)
    at com.vaadin.ui.Grid$AbstractSelectionModel.fireSelectionEvent(Grid.java:1471)
    at com.vaadin.ui.Grid$SingleSelectionModel.select(Grid.java:1538)
    at com.vaadin.ui.Grid$SingleSelectionModel$1.select(Grid.java:1510)
    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 com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:119)
    at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:432)
    at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:404)
    at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:273)
    at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
    at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41)
    at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1422)
    at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:379)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1524)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1480)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
Caused by: com.vaadin.data.util.converter.Converter$ConversionException: Unable to convert value of type java.time.LocalDate to presentation type class java.util.Date. No converter is set and the types are not compatible.
    at com.vaadin.data.util.converter.ConverterUtil.convertFromModel(ConverterUtil.java:118)
    at com.vaadin.ui.AbstractField.convertFromModel(AbstractField.java:738)
    at com.vaadin.ui.AbstractField.convertFromModel(AbstractField.java:723)
    at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:659)
    ... 55 more

31706.png

Podrian dar solucion al siguiente error, gracias

ago 10, 2017 1:16:34 AM com.vaadin.server.DefaultErrorHandler doDefault
GRAVE:
com.vaadin.data.Buffered$SourceException
at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:664)
at com.vaadin.data.fieldgroup.FieldGroup.bind(FieldGroup.java:273)
at com.vaadin.data.fieldgroup.BeanFieldGroup.bind(BeanFieldGroup.java:155)
at com.vaadin.data.fieldgroup.FieldGroup.buildAndBindMemberFields(FieldGroup.java:1014)
at com.vaadin.data.fieldgroup.FieldGroup.bindMemberFields(FieldGroup.java:859)
at com.vaadin.data.fieldgroup.BeanFieldGroup.createAndBindFields(BeanFieldGroup.java:266)
at com.vaadin.data.fieldgroup.BeanFieldGroup.bindFieldsUnbuffered(BeanFieldGroup.java:235)
at com.example.tutorial.CustomerForm.setCustomer(CustomerForm.java:46)
at com.example.tutorial.MyUI.lambda$2(MyUI.java:81)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:200)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:163)
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1015)
at com.vaadin.ui.Grid.fireSelectionEvent(Grid.java:6021)
at com.vaadin.ui.Grid$AbstractSelectionModel.fireSelectionEvent(Grid.java:1470)
at com.vaadin.ui.Grid$SingleSelectionModel.select(Grid.java:1537)
at com.vaadin.ui.Grid$SingleSelectionModel$1.select(Grid.java:1509)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:119)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:437)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:402)
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:273)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1436)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:380)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.vaadin.data.util.converter.Converter$ConversionException: Unable to convert value of type java.time.LocalDate to presentation type class java.util.Date. No converter is set and the types are not compatible.
at com.vaadin.data.util.converter.ConverterUtil.convertFromModel(ConverterUtil.java:118)
at com.vaadin.ui.AbstractField.convertFromModel(AbstractField.java:735)
at com.vaadin.ui.AbstractField.convertFromModel(AbstractField.java:720)
at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:656)
… 56 more

Eleazar Alfriadez:
Podrian dar solucion al siguiente error, gracias

Are you from Spain? I bet you are.

I think this forum is meant for international users, so it is based in English. It is probably a bit of bad manners to write here in a different language. You have [a Spanish forum]
(https://vaadin.com/forum/category/2366557]) more suited for non-English speaker users, where you can use your own language, which I’m sorry is not as “universal” as you think (other non-Spanish native speakers Spaniards probably know what I mean).

Also, try to be a bit more descriptive than simply pasting the full exception you got in a random thread. For instance: what were you trying to accomplish? Which was the context? Can you post a snippet of your code?

Furthermore, looks like you are blaming the Vaadin staff for that error, when in fact the fault is caused by yourself…