topic Re: Invalid JSON message in Qt Maps SDK Questions

Invalid JSON message

ViníciusCosta — Thu, 06 Feb 2020 20:58:47 GMT

Hello,

I've been trying to consume a Feature Service endpoint that was recently generated but I always get the following message at Qt Creator:

Exception at 0x7ffe0b0fa839, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) in runtimecore!RT_UtilityTraversability_fromJSON

The map loads but not the Feature Service Layer.

With other urls the service works as intended, which makes me think that something might be wrong with my Feature Server but I have no clue what since this error message is very generic.

Here's how I'm trying to just load it, I got it straight from the example:

I do have a more complex application but right now I only want to display this feature layer to check its availability.

FeatureLayer {

                id: featureLayer

                ServiceFeatureTable {

                    id: featureTable

                    url: "featureServiceURL"

            onLoadStatusChanged: {

                if (loadStatus === Enums.LoadStatusLoaded) {

                    mapView.setViewpoint(viewPoint);

        // initial viewpoint

        ViewpointCenter {

            id: viewPoint

            Point {

                x:  -42.97

                y:  21.1

                spatialReference: SpatialReference {

                    wkid: 4674

            targetScale: 3e7

We use a hosted ArcGis Server in one of our servers.

Thanks\!

Re: Invalid JSON message

LucasDanzinger — Thu, 06 Feb 2020 21:26:57 GMT

How is your feature service URL formatted? In the above snippet you have a text string for your URL property. Make sure you specify the layer in the service URL

For example, you should use http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0 and not http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer

Re: Invalid JSON message

ViníciusCosta — Fri, 07 Feb 2020 12:43:17 GMT

I just didn't want to post my actual url since it's a server you can't access. But here's how it's formatted:

https://192.168.0.204/server/rest/services/gislmdc_uff_geotecnia/gislmdc_uff_geotecnia/FeatureServer/10

Re: Invalid JSON message

LucasDanzinger — Fri, 07 Feb 2020 15:18:06 GMT

That's odd, this should work. Does the rest of your code look similar to this code sample? arcgis-runtime-samples-qt/FeatureLayer_FeatureService.qml at master · Esri/arcgis-runtime-samples-qt · GitHub

Is your service secured?

Re: Invalid JSON message

ViníciusCosta — Fri, 07 Feb 2020 18:27:49 GMT

Right now it's the same code, I've only changed the url and Viewpoint parameters.

I don't know if the service itself is secured but I can acess it's url just fine and see it on the online map.

Re: Invalid JSON message

ViníciusCosta — Mon, 10 Feb 2020 16:59:05 GMT

A http version of the service was published and now we're getting an additional error:

Exception at 0x7ffe0b0fa839, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) in runtimecore!ESRI_CopyProtect_GetInstallDir

Lucas Danzinger‌, do you have any idea of what this means?

Re: Invalid JSON message

LucasDanzinger — Mon, 10 Feb 2020 20:40:04 GMT

Not sure what is going on. Are you able to share your service (or a similar test service) with me? You can direct message me.

Re: Invalid JSON message

ViníciusCosta — Tue, 11 Feb 2020 12:15:22 GMT

I've figured it out.

The problem is our server load, it was very unstable and hitting 100% CPU load very quickly. We're working on it to lower it's demand, there's a lot of unneeded stuff on it.

Thank you for your help!