Possible Error with JavaScript API 3.9 and AGS 10.2.2 - Feature Layer

Question

I have an error with ArcGIS Server 10.2.2 and JavaScript API v3.9 adding a layer with Feature Layer. Initially the layer is loaded, but when browsing the map (pan, zomm, etc) the following errors appear in Chrome or IE: Error {stack: "Error�?� at Error (native)�?� at Object.f.load (�?�)�?� at http://js.arcgis.com/3.9/init.js:191:300", code: 400, message: "Unable to draw graphic (null): Failed to execute query.", details: Array[0], log: undefined�?�} 1. _ssl: undefined 2. code: 400 3. details: Array[0] 4. httpCode: 400 5. log: undefined 6. message: "Unable to draw graphic (null): Failed to execute query." 7. stack: "Error�?� at Error (native)�?� at Object.f.load (http://js.arcgis.com/3.9/init.js:629:424)�?� at http://js.arcgis.com/3.9/init.js:187:69�?� at c (http://js.arcgis.com/3.9/init.js:74:221)�?� at d (http://js.arcgis.com/3.9/init.js:74:10)�?� at resolve.callback (http://js.arcgis.com/3.9/init.js:75:350)�?� at c (http://js.arcgis.com/3.9/init.js:74:436)�?� at d (http://js.arcgis.com/3.9/init.js:74:10)�?� at resolve.callback (http://js.arcgis.com/3.9/init.js:75:350)�?� at http://js.arcgis.com/3.9/init.js:191:300" 8. __proto__: d In AGS 10.2.2 the error is: Unable to process request. json The service was classified with a single symbology and not contains empty geometries. This case also occurs with a other samples of AGOL, but with my AGS 10.2.2 https://developers.arcgis.com/javascript/jssamples/query_buffer.html I have not found any ArcGIS AGOL Server with version 10.2.2 (only 10.21 or less found). Thanks!

AdrianFratila · Answer

Hi John,

Thanks! Your idea worked for me. One thing though, featureLayer doesn't have zoom events so map should be used instead.

"map.on("zoom-start", function() {
    featureLayer.setVisibility(false);
 });

map.on("zoom-end", function() {
    featureLayer.setVisibility(true);
 }); "

Regards,

Adrian

JohnGravois · Answer

Oyvind,

thanks for that!  i was definitely able to reproduce the error when trying to pan and zoom in the middle of drawing the 1000 polygon graphics in my own feature layer.

i wrote up a quick fiddle to demonstrate how to resolve this problem based on threads you shared.

ØyvindIdland · Answer

The "Unable to draw graphic (null)" error has been reported in earlier versions too. It seems to happen when trying to change the extent while a layer is drawing.

I get these quite often (using Chrome as dev tool). It doesn't seem to affect my application in any way, put it is quite annoying since it pollutes the console with noise.

Some workarounds that may work:

http://forums.arcgis.com/threads/9657-Unable-to-draw-graphic-(null)-Deferred-Cancelled

http://gis.stackexchange.com/questions/33584/typeerror-unable-to-draw-graphic-geometrynull-symbolnull-after-adding-ti