topic Re: Intermittent Dojo error on zooming in ArcGIS JavaScript Maps SDK Questions

Intermittent Dojo error on zooming

RexBradford — Mon, 03 Oct 2011 14:08:57 GMT

Hello,

I am working on a Javascript mapping app, using v.2.4 of the ArcGIS toolkit. Recently I have been getting intermittent but frequent Dojo hanging errors when zooming (roughly once per 15-20 zooms). The Dojo error occurs after the onZoomStart event and before the onZoomEnd; there is no intervening code of mine between these that I'm aware of (onExtentChange is fired after onZoomEnd, and I removed my onExtentChange handler with no effect).

I have so far been unsuccessful in determining what I might have done to cause this (and the entire app is way too big to try to reproduce here). There error I see in Firebug is usually something like "_831 is undefined", and the line of code with the error is the unhelpful mega-line which defines the entire Dojo toolkit.:

if(!dojo._hasResource["dijit._base.manager"]){dojo._hasResource["dijit._base.manager"]=true;dojo.provid............

Has anybody seen such hanging behavior due to zooming and know where the cause might lie? Or how to debug something like this? Thanks in advance if so.

Rex Bradford

Re: Intermittent Dojo error on zooming

derekswingley1 — Mon, 03 Oct 2011 17:40:36 GMT

Is this specific to one browser or does it happen in all browsers?

Can post some sample code to repro the issue?

Re: Intermittent Dojo error on zooming

RexBradford — Tue, 04 Oct 2011 13:03:55 GMT

Well, good questions. Firefox on Mac (v.7), unfortunately my default browser, is the only one that seems to fail outright - sometimes Firebug will let me click on the error to continue, sometimes the page just freezes.

All other browsers I've tested (Safari Mac, IE 9 on Win7, Firefox on Win7) spew the same sorts of errors, and lots of them (xxxxx is undefined, also dojo.io.script error") while zooming, but the browser doesn't seem to care.

I unminified the 2.4 dojo/esri js file, and verified that it is the base map tiles (cache?) where the undefineds are popping out from.

I do not at this point have a small "test case" which exhibits this problem, only the large app.

Rex Bradford

Re: Intermittent Dojo error on zooming

derekswingley1 — Tue, 04 Oct 2011 14:40:52 GMT

Is your app public?

Re: Intermittent Dojo error on zooming

SanajyJadhav — Wed, 05 Oct 2011 03:41:26 GMT

Hi,

I am also facing sort of similar issue. After zooming 3-4 times, this is what we get in Firebug console.

[PHP]
dojo.io.script.jsonp_dojoIoScript_9_02876_2_388657133974021_49_104 is undefined
http://gens003/ArcGIS/rest/services/SVP1/Map_Viewer_bldgs/FeatureServer/7/query?f=json&returnGeometry=true&spatialRel=esriSpatialRelIntersects&geometry=%7B%22xmin%22%3A-13174233.88486345%2C%22ymin%22%3A4031349.028522761%2C%22xmax%22%3A-13173010.892410856%2C%22ymax%22%3A4032572.020975356%2C%22spatialReference%22%3A%7B%22wkid%22%3A102100%7D%7D&geometryType=esriGeometryEnvelope&inSR=102100&outFields=*&outSR=102100&callback=dojo.io.script.jsonp_dojoIoScript_9_02876_2_388657133974021_49_104._jsonpCallback
Line 1
[/PHP]

This is the featurelayer with mode 'OnDemand'.The strange thing is if I set ( which I can't) mode to 'SnapShot', very unlikely I would get this error.

I am not sure how to fix this.Any help is appreciated.

Thanks,
Sanjay.