topic Re: Export Web Map Task: Failed to create layer from WMS service in ArcGIS Web AppBuilder Questions

Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Wed, 13 Jun 2018 20:04:15 GMT

I'm using Export Web Map Task from a Java app. The request includes MapServer layer from my ArcGIS 10.5 server and a WMS layer from another domain. I'm not sure why ArcGIS cannot create a layer for the WMS request.

ArcGIS is logging the following:

<Msg time='2018-06-13T15:45:59,973' type='SEVERE' code='20010' target='Utilities/PrintingTools.GPServer' methodName='GPServerSync.CheckMessages' machine='WTGGIS1' process='19928' thread='23592' user='anonymous' >Error executing tool. Export Web Map Task : Layer "MC image": Failed to create layer from service at http://<some domain>.com:8080/geoserver/wms?&SERVICE=WMS&REQUEST=GetMap&VERSION=1.1.1&LAYERS=Postgres%3Abuildings%2CPostgres%3Aparcels%2CPostgres%3Anonnfhl_floodplain&STYLES=&FORMAT=image%2Fpng&TRANSPARENT=true&HEIGHT=653&WIDTH=1448&SRS=EPSG%3A3857&BBOX=-8279556.363820421,4955018.621996873,-8279124.016879315,4955213.89471751.
Failed to execute (Export Web Map).
Failed to execute (Export Web Map Task).</Msg>

The WMS request itself succeeds when executed from a browser.

Attached is the Export Web Map Task Web_Map_as_json. The request specifies:

f=json

Format=PNG8

Layout_Template=MAP_ONLY

Help! Thanks.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Wed, 13 Jun 2018 20:26:23 GMT

from your attached json, it looks like the url of the layer basically a GetMap request.

can you pls try with http://<some domain>.com:8080/geoserver/wms ?

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Wed, 13 Jun 2018 20:37:28 GMT

Thanks for replaying Tanu but I don't understand your post.

The layer that is failing is a WMS GetMap request for a PNG image.

The WMS URL in the Export Web Map Task request successfully returns an image when hit from the browser.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Wed, 13 Jun 2018 20:40:56 GMT

my bad!

what does the url, that you used to add that wms layer in your web app, look like?

does it look like:

(a) http://<some domain>.com:8080/geoserver/wms, or

(b) http://<some domain>.com:8080/geoserver/wms?&SERVICE=WMS&REQUEST=GetMap&VERSION=1.1.1&LAYERS=Postgres%3Abuildings%2CPost…

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Wed, 13 Jun 2018 20:51:05 GMT

The task request includes an operational layer definition as follows:

{
"url" : "http://<some domain>.com:8080/geoserver/wms?&SERVICE=WMS&REQUEST=GetMap&VERSION=1.1.1&LAYERS=Postgres%3Abuildings%2CPostgres%3Aparcels%2CPostgres%3Anonnfhl_floodplain&STYLES=&FORMAT=image%2Fpng&TRANSPARENT=true&HEIGHT=653&WIDTH=1448&SRS=EPSG%3A3857&BBOX=-8279556.363820421,4955018.621996873,-8279124.016879315,4955213.89471751",
"title" : "MC image",
"type" : "wms",
"format" : "png8",
"transparentBackground" : true>,

}

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Wed, 13 Jun 2018 21:03:55 GMT

yep, I have noticed that and that is why i'm asking 'did you use the url exactly as it appears in the task request when you added that to your web map?'

the url in the task request is basically invalid.

all the name-value pairs/parameters showing up after ? in the url are not valid

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Wed, 13 Jun 2018 21:36:45 GMT

I took your answer to mean that layer names need to be coded into the Task request instead?

I tried submitting using the WMS layer as the only the following operational layer and now I'm seeing:

<Msg time='2018-06-13T17:23:24,668' type='SEVERE' code='103800' target='Utilities/PrintingTools.GPServer' machine='WTGGIS1' process='19928' thread='23592' user='anonymous' >MC image: Failed to open raster dataset</Msg>

This is the request:

{
"mapOptions": {
"showAttribution": false,
"extent": {
"xmin": -8279556.363820421,
"ymin": 4955018.621996873,
"xmax": -8279124.016879315,
"ymax": 4955213.89471751,
"spatialReference": {
"wkid": 102100,
"latestWkid": 3857
}
},
"spatialReference": {
"wkid": 102100,
"latestWkid": 3857
},
"scale": 1128.497176
},
"operationalLayers": [
{
"url" : "http://reports.massivecert.com:8080/geoserver/wms",
"title" : "MC image",
"type" : "wms",
"version":"1.1",
"format" : "png8",
"transparentBackground" : true,
"layers" : [
{ name: "Postgres:buildings"},
{ name: "Postgres:parcels"},
{ name: "Postgres:nonnfhl_floodplain"}
]
},

],
"exportOptions": {
"outputSize": [
1448,
653
],
"dpi": 96
}
}

The response contains a URL to an image file with only a white background.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Wed, 13 Jun 2018 22:21:53 GMT

thanks...

can you pls try with the following print service?

http://sampleserver6.arcgisonline.com/arcgis/rest/services/Utilities/PrintingTools/GPServer/Export%20Web%20Map%20Task/

also, i have noticed that 'name' properties, in 'layers' element inside the json that you attached, are not within a pair of double quotes. is that just a copy/paste error or that is how it is being generated by JS API/the print task?

also, I tried with the above print service with the following json and it worked for me.

{ "mapOptions": { "showAttribution": false, "extent": { "xmin": -8279556.363820421, "ymin": 4955018.621996873, "xmax": -8279124.016879315, "ymax": 4955213.89471751, "spatialReference": { "wkid": 102100, "latestWkid": 3857 } }, "spatialReference": { "wkid": 102100, "latestWkid": 3857 }, "scale": 1128.497176 }, "operationalLayers": [{ "url": "http://reports.massivecert.com:8080/geoserver/wms", "title": "MC image", "type": "wms", "version": "1.1", "format": "png8", "transparentBackground": true, "layers": [{ "name": "Postgres:buildings" }, { "name": "Postgres:parcels" }, { "name": "Postgres:nonnfhl_floodplain" }] }], "exportOptions": { "outputSize": [1448, 653], "dpi": 96 } }

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Wed, 13 Jun 2018 22:32:16 GMT

Thanks Tanu.

Your JSON with sampleserver6.arcgisonline.com server works to render a correct image (sometimes).

Your JSON on my server emits a blank image (seemingly consistently).

What's with that?

I don't have an issue at all with my server generating images for web maps that include layers from my GIS server.

My server does not need to go thru a proxy to reach external sites.

Thoughts?

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Wed, 13 Jun 2018 22:48:56 GMT

urgh, that might be a bug. I need to dig in further.

what version of ArcGIS Server are you running?

thanks for confirming that it works for you too with sampleserver6 print service.

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Thu, 14 Jun 2018 17:21:16 GMT

Tanu we are running 10.5.0 on server and adapter. Thanks.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Thu, 14 Jun 2018 17:26:31 GMT

Thanks.

Any chance you can move to 10.6 - as you see it works with 10.6 out of the box print service (that is the one running on the sampleserver6 server).

I will investigate it further to find out what is causing it not to draw.

thanks.

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Thu, 14 Jun 2018 17:28:30 GMT

We could upgrade however even the sampleserver6.arcgisonline.com is working only sporadically.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Thu, 14 Jun 2018 17:46:07 GMT

that is weird.

would you mind installing a 10.6 server and apply the following patch and give it a shot off your machine.

ArcGIS Server 10.6 Printing and Script Tool Patch

I was not able to repro this sporadic nature with the print service running off my machine.

quick question before you upgrade:

1) do you use out of the box print service or you use print service published from ArcMap using your own layout templates?

2) if you do not use the out of the box print service, then do you have portal installed?

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Thu, 14 Jun 2018 17:51:49 GMT

Request is made from a Java app that is building ExportWebMap task JSON according to the specification here Export Web Map Task—ArcGIS REST API: Services Directory | ArcGIS for Developers and sending it via HTTP client to ArcGIS server directly. We are not running portal.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Thu, 14 Jun 2018 17:57:22 GMT

sorry, I guess wasn't clear enough with my first question.

the print service that you use in your JS API app - is that the one that comes with a server install? the print service that gets installed as part of server install, lives inside Utilities folder and the url looks something like this: http://machine/arcgis/rest/services/Utilities/PrintingTools/GPServer/Export%20Web%20Map%20Task

Re: Export Web Map Task: Failed to create layer from WMS service

jackcrawford — Thu, 14 Jun 2018 18:04:12 GMT

Sorry. I'm clear now. I believe this is out of the box install of the service but I'm checking with my admin to confirm.

Re: Export Web Map Task: Failed to create layer from WMS service

TanuHoque — Thu, 14 Jun 2018 18:11:38 GMT

if it is the out of the box print service, then you should be good. you'd not need portal.

just install 10.6 server, start the out of the print service using Manager and give this a shot.

there are many other benefits you'd get from it such as vector tile layer support, supports for JS API smart mapping etc.

What's new in ArcGIS Server 10.6 - Improved Print Service