Client exception if changing contents before FW application loaded first time.

[gilberto-torrezan]

@caalador commented on Fri Jun 15 2018

If you have (for instance) a Flow Tabs that can be used to navigate to a new view containing another embedded FW application and navigate before the application has loaded the first time you get a:

(TypeError) : $0.firstElementChild.setResponse is not a function

as a error notification and the console stack trace:

SEVERE: Error sending hierarchy change eventscom.google.gwt.event.shared.UmbrellaException: Exception caught: (TypeError) : Cannot set property '__listener' of null
    at Unknown.Hg(AppWidgetset-0.js)
    at Unknown.Lg(AppWidgetset-0.js)
    at Unknown.Rg(AppWidgetset-0.js)
    at Unknown.Sx(AppWidgetset-0.js)
    at Unknown.new Vx(AppWidgetset-0.js)
    at Unknown.qx(AppWidgetset-0.js)
    at Unknown.EFb(AppWidgetset-0.js)
    at Unknown.SFb(AppWidgetset-0.js)
    at Unknown.uRb(AppWidgetset-0.js)
    at Unknown.pRb(AppWidgetset-0.js)
    at Unknown.WQb(AppWidgetset-0.js)
    at Unknown.lRb(AppWidgetset-0.js)
    at Unknown.LBb(AppWidgetset-0.js)
    at Unknown.yCb(AppWidgetset-0.js)
    at Unknown.Hb(AppWidgetset-0.js)
    at Unknown.eval(AppWidgetset-0.js)
    at Unknown.oi(AppWidgetset-0.js)
    at Unknown.ri(AppWidgetset-0.js)
    at Unknown.eval(AppWidgetset-0.js)
Caused by: com.google.gwt.core.client.JavaScriptException: (TypeError) : Cannot set property '__listener' of null
    at Unknown.Lkb(AppWidgetset-0.js)
    at Unknown.anb(AppWidgetset-0.js)
    at Unknown.new yEd(AppWidgetset-0.js)
    at Unknown.qEd(AppWidgetset-0.js)
    at Unknown.vEd(AppWidgetset-0.js)
    at Unknown.XDb(AppWidgetset-0.js)
    at Unknown.zx(AppWidgetset-0.js)
    at Unknown.qx(AppWidgetset-0.js)
    at Unknown.EFb(AppWidgetset-0.js)
    at Unknown.SFb(AppWidgetset-0.js)
    at Unknown.uRb(AppWidgetset-0.js)
    at Unknown.pRb(AppWidgetset-0.js)
    at Unknown.WQb(AppWidgetset-0.js)
    at Unknown.lRb(AppWidgetset-0.js)
    at Unknown.LBb(AppWidgetset-0.js)
    at Unknown.yCb(AppWidgetset-0.js)
    at Unknown.Hb(AppWidgetset-0.js)
    at Unknown.eval(AppWidgetset-0.js)
    at Unknown.oi(AppWidgetset-0.js)
    at Unknown.ri(AppWidgetset-0.js)
    at Unknown.eval(AppWidgetset-0.js)

---

@caalador commented on Fri Jun 15 2018

For a simple test use FilteringTable or PopupButton demo.

---

@caalador commented on Tue Jun 19 2018

The faster load after #92 makes this less of an issue and needs actual fast clicking to happen.

[pleku]

It is possible to block the user from interacting with the UI with the loading indicator in Flow, by setting it to eg. dim the whole page for the loading time, and thus block user interaction to the components.

[eriklumme]

I get this without interacting with the web page at all

[pleku]

My bet is that this is resolved by the fix for #72. In case it is not, please comment here or open a new issue.

[johannest]

Seems to reproduce still. Bigger multimodule mpr V7 - V14 project: V 7.7.17 and 14.4.4, mpr-v7-2.0.6 Happens usually when reloading the page containing a legacy view.

Uncaught TypeError: $0.firstElementChild.setResponse is not a function at Object.eval (eval at cu (client-C4B53966888EAB6CBD0D20BD246409CB.cache.js:1), <anonymous>:3:22)

Un-obfuscated stack trace

client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:1894 Uncaught TypeError: $0.firstElementChild.setResponse is not a function
    at Object.eval (eval at com_vaadin_client_flow_ExecuteJavaScriptProcessor_$invoke__Lcom_vaadin_client_flow_ExecuteJavaScriptProcessor_2_3Ljava_lang_String_2Lcom_vaadin_client_flow_collection_JsArray_2Lcom_vaadin_client_flow_collection_JsMap_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:6359), <anonymous>:3:22)
    at com_vaadin_client_flow_ExecuteJavaScriptProcessor_$invoke__Lcom_vaadin_client_flow_ExecuteJavaScriptProcessor_2_3Ljava_lang_String_2Lcom_vaadin_client_flow_collection_JsArray_2Lcom_vaadin_client_flow_collection_JsMap_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:6360)
    at com_vaadin_client_flow_ExecuteJavaScriptProcessor_$handleInvocation__Lcom_vaadin_client_flow_ExecuteJavaScriptProcessor_2Lelemental_json_JsonArray_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:6349)
    at com_vaadin_client_flow_ExecuteJavaScriptProcessor_$execute__Lcom_vaadin_client_flow_ExecuteJavaScriptProcessor_2Lelemental_json_JsonArray_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:6287)
    at com_vaadin_client_communication_MessageHandler_$lambda$4__Lcom_vaadin_client_communication_MessageHandler_2Lelemental_json_JsonObject_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:5320)
    at com_vaadin_client_communication_MessageHandler$lambda$4$Type_MessageHandler$lambda$4$Type__Lcom_vaadin_client_communication_MessageHandler_2Lelemental_json_JsonObject_2V.com_vaadin_client_communication_MessageHandler$lambda$4$Type_flush__V [as flush__V] (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:5573)
    at com_vaadin_client_flow_reactive_Reactive_flush__V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:9684)
    at com_vaadin_client_communication_MessageHandler_$processMessage__Lcom_vaadin_client_communication_MessageHandler_2Lcom_vaadin_client_ValueMap_2Ljava_lang_Object_2DV (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:5382)
    at com_vaadin_client_communication_MessageHandler$lambda$0$Type_MessageHandler$lambda$0$Type__Lcom_vaadin_client_communication_MessageHandler_2Lcom_vaadin_client_ValueMap_2Ljava_lang_Object_2DV.com_vaadin_client_communication_MessageHandler$lambda$0$Type_execute__V [as execute__V] (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:5540)
    at com_vaadin_client_DependencyLoader_runWhenEagerDependenciesLoaded__Lcom_vaadin_client_Command_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:2332)
    at com_vaadin_client_communication_MessageHandler_$handleJSON__Lcom_vaadin_client_communication_MessageHandler_2Lcom_vaadin_client_ValueMap_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:5250)
    at com_vaadin_client_communication_MessageHandler_$handleMessage__Lcom_vaadin_client_communication_MessageHandler_2Lcom_vaadin_client_ValueMap_2V (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:5267)
    at com_vaadin_client_communication_XhrConnection$XhrResponseHandler_XhrConnection$XhrResponseHandler__Lcom_vaadin_client_communication_XhrConnection_2V.com_vaadin_client_communication_XhrConnection$XhrResponseHandler_onSuccess__Lcom_google_gwt_xhr_client_XMLHttpRequest_2V [as onSuccess__Lcom_google_gwt_xhr_client_XMLHttpRequest_2V] (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:6208)
    at com_vaadin_client_gwt_elemental_js_util_Xhr$Handler_Xhr$Handler__Lcom_vaadin_client_gwt_elemental_js_util_Xhr$Callback_2V.com_vaadin_client_gwt_elemental_js_util_Xhr$Handler_onReadyStateChange__Lcom_google_gwt_xhr_client_XMLHttpRequest_2V [as onReadyStateChange__Lcom_google_gwt_xhr_client_XMLHttpRequest_2V] (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:10006)
    at XMLHttpRequest.<anonymous> (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:1583)
    at com_google_gwt_core_client_impl_Impl_apply__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2 (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:916)
    at com_google_gwt_core_client_impl_Impl_entry0__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2 (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:955)
    at XMLHttpRequest.<anonymous> (client-3E85BB70F7985670DD3EF3C6DD5C2A2E.cache.js:943)

[johannest]

When using a production build this error disappears.