topic Re: Export Web Map Task Error: "Unable to connect to map server..." in ArcGIS JavaScript Maps SDK Questions

Export Web Map Task Error: "Unable to connect to map server..."

AR — Sat, 11 Dec 2021 18:26:55 GMT

I receive this error anytime I try to print any base map from http://services.arcgisonline.com.

If I remove the base map from my code, it prints fine.

(From Firebug console:)
"Error executing tool.: Layer "layer0": Unable to connect to map server at http://services.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer. Failed to execute (Export Web Map). Failed to execute (Export Web Map Task)."

I get a gut-feeling it has something to do with my server's proxy, but I'm not sure.

Any thoughts?

Here is the proxy I'm using:

<%@page session="false"%>
<%@page import="java.net.*,java.io.*" %>
<%!
String[] serverUrls = {
  //"<url>[,<token>]"
  //For ex. (secured server): "http://myserver.mycompany.com/arcgis/rest/services,ayn2C2iPvqjeqWoXwV6rjmr43kyo23mhIPnXz2CEiMA6rVu0xR0St8gKsd0olv8a"
  //For ex. (non-secured server): "http://sampleserver1.arcgisonline.com/arcgis/rest/services"
  "http://sampleserver1.arcgisonline.com/arcgis/rest/services",
  "http://***/arcgis/rest/services, username=***",// username=***
  "http://server.arcgisonline.com/ArcGIS/rest/services",
  "http://***/ArcGIS/rest/services, username=***&password=***",
  "http://servicesbeta4.esri.com/arcgis/rest/services/",
  "http://sampleserver2.arcgisonline.com/arcgis/rest/services" 
};
%>
<%
try {
  String reqUrl = request.getQueryString();
  boolean allowed = false;
  String token = null;
  for(String surl : serverUrls) {
    String[] stokens = surl.split("\\s*,\\s*");
    if(reqUrl.toLowerCase().contains(stokens[0].toLowerCase())) {
      allowed = true;
      if(stokens.length >= 2 && stokens[1].length() > 0)
        token = stokens[1];
      break;
    }
  }
  if(!allowed) {
    response.setStatus(403);
    return;
  }
  if(token != null) {
    reqUrl = reqUrl + (reqUrl.indexOf("?") > -1 ? "&" : "?") + "token=" + token;
  }
  URL url = new URL(reqUrl);
 HttpURLConnection con = (HttpURLConnection)url.openConnection();
 con.setDoOutput(true);
 con.setRequestMethod(request.getMethod());
 if(request.getContentType() != null) {
   con.setRequestProperty("Content-Type", request.getContentType());
 }
  con.setRequestProperty("Referer", request.getHeader("Referer"));
 int clength = request.getContentLength();
 if(clength > 0) {
  con.setDoInput(true);
  InputStream istream = request.getInputStream();
  OutputStream os = con.getOutputStream();
  final int length = 5000;
   byte[] bytes = new byte[length];
   int bytesRead = 0;
   while ((bytesRead = istream.read(bytes, 0, length)) > 0) {
     os.write(bytes, 0, bytesRead);
   }
 }
  else {
    con.setRequestMethod("GET");
  }
 out.clear();
  out = pageContext.pushBody();
 OutputStream ostream = response.getOutputStream();
 response.setContentType(con.getContentType());
 InputStream in = con.getInputStream();
 final int length = 5000;
  byte[] bytes = new byte[length];
  int bytesRead = 0;
  while ((bytesRead = in.read(bytes, 0, length)) > 0) {
    ostream.write(bytes, 0, bytesRead);
  }
} catch(Exception e) {
 response.setStatus(500);
}
%>

Re: Export Web Map Task Error: "Unable to connect to map server..."

AndyGup — Fri, 04 May 2012 14:36:12 GMT

@roessera here are some guidelines to help verify what's going on when a proxy doesn't seem to be working:

- Make sure you have the latest version of the ArcGIS proxy.
- Make sure that the Server URL properties are configured properly.
- If you are using tokens, follow the directions for the appropriate proxy (.jsp, ashx or php) for allowing tokens.
- Check the Proxy's web server log files. You may have to turn on full logging first. And, don't forget to disable full logging after you are done testing. If the proxy can't connect to ArcGIS Server you should be able to see an error in the web server log.
- As a last resort, run an HTTP protocol analyzer on the proxy server, for example WireShark. This will let you see and analyze the inbound and outbound HTTP connections.

-Andy

Re: Export Web Map Task Error: "Unable to connect to map server..."

KyleDixon — Wed, 09 May 2012 13:10:12 GMT

The problem is that our network uses a proxy to access the internet, the web server can't access arcgisonline. How do I configure the server to use a web proxy.

We are using arcserver 10.1

Re: Export Web Map Task Error: "Unable to connect to map server..."

AndyGup — Wed, 09 May 2012 14:10:54 GMT

Hi Kyle,

There are three likely scenarios.

1) Configuring an ArcGIS Proxy and making sure it's working. This will allow your applications to access GIS services such as http://services.arcgisonline.com. My previous suggestions relate to this scenario.

2) Configuring your organization's network dmz/proxy/firewall. For this you'll have to talk to your organization's network/IT engineers. They will have to configure your network proxy, DMZ or firewall that allows connections between the ArcGIS Proxy and http://services.arcgisonline.com.

3) Configuring proxy access to your ArcGIS Server. You also mentioned you have ArcGIS Server. If you have external applications that need to access your ArcGIS Server GIS services, then you'll also have to work with your network/IT engineers. We consider this an enterprise-level, third party deployment and offer professional services to help architect and configure reverse proxy configurations. Here's a few links that can help with this scenario.

Configure a reverse proxy system architecture with ArcGIS Server
Configure a reverse proxy system architecture for ArcGIS Server with IIS 7

I hope that helps,

-Andy

Re: Export Web Map Task Error: "Unable to connect to map server..."

KyleDixon — Wed, 09 May 2012 14:28:30 GMT

I'm not trying to access from server from the internet, I need configure the server for access to the internet.

The user arcgis that is running the print services cannot access arcgisonline.com.

I need to configure these settings for the arcgis user.
[ATTACH=CONFIG]14205[/ATTACH]

Re: Export Web Map Task Error: "Unable to connect to map server..."

KyleDixon — Wed, 09 May 2012 15:06:32 GMT

I found this:
http://resourcesbeta.arcgis.com/en/help/main/10.1/0154/015400000309000000.htm

I confirmed the proxy is configured, but it still isn't working.

Re: Export Web Map Task Error: "Unable to connect to map server..."

Anonymous User — Wed, 09 May 2012 16:29:17 GMT

Kyle,

I did notice that you've not added "http://services.arcgisonline.com/ArcGIS/rest/services" to the serverUrls string array in the Java proxy.

If the "http://services.arcgisonline.com/ArcGIS/rest/services" is not found in this array no requests will be forwarded onward to services hosted in http://services.arcgisonline.com.

This may be the problem. Try adding this URL to the string array.

After doing so, if this does not work can you please send the URL and full request which is associated with the below error message?

"Error executing tool.: Layer "layer0": Unable to connect to map server at http://services.arcgisonline.com/Arc...Base/MapServer. Failed to execute (Export Web Map). Failed to execute (Export Web Map Task)."

Regards,
Doug Carroll, ESRI Support Services SDK Team
http://support.esri.com/

Re: Export Web Map Task Error: "Unable to connect to map server..."

KyleDixon — Thu, 10 May 2012 11:30:59 GMT

We aren't using services.arcgisonline, I added http://services.arcgisonline.com/ArcGIS/rest/services to the java proxy and it didn't work.
The full request is attached.

Re: Export Web Map Task Error: "Unable to connect to map server..."

Anonymous User — Thu, 10 May 2012 17:05:14 GMT

Looks like I read "http://services.arcgisonline.com/ArcGIS/rest/services" based on the first thread.

Anyhow, can you give more details about the problem? In the printout are you able to see the map features from the service that is hosted locally or is it just that map features from http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer that are missing?

Also what happens if you open a web browser on darcgis1 and go to http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer? Are you able to see the REST endpoint?

Also at one point did you have both Beta2 and Pre Release on the same machine? Please let me know?

Regards,
Doug Carroll, ESRI Support Services SDK Team
http://support.esri.com/

Re: Export Web Map Task Error: "Unable to connect to map server..."

KyleDixon — Thu, 10 May 2012 17:16:37 GMT

Desktop is installed and I can access server.arcgisonline from ArcCatalog and a web browser.

In ArcCatalog: Customize... Arccatalog Options... Connections the proxy URL and Port is displayed correctly. The error in the server log (below) suggests it is not using the proxy setting to access AGOL.

Layer "layer0": Unable to connect to map server at http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer
Cannot connect to this server.
Failed to execute (Export Web Map).

Re: Export Web Map Task Error: "Unable to connect to map server..."

RandallWilliams — Mon, 21 May 2012 15:45:18 GMT

This issue can be addressed by ensuring the service account that ArcGIS Server runs under could access ArcGISOnline through the network proxy. See:

Using a proxy server to connect to the Internet
http://resourcesbeta.arcgis.com/en/help/main/10.1/index.html#/Using_a_proxy_server_to_connect_to_the_Internet/015400000309000000/

In this case, it looks like the print task runs server side, so the basemap layers had to be accessible by ArcGIS Server.

~r

Re: Export Web Map Task Error: "Unable to connect to map server..."

SharonGin1 — Tue, 12 Mar 2013 16:12:07 GMT

I'm getting the exact same error with the export web map function. We have implemented an intranet flex web application on ArcGIS Server for .Net 10.1. We're using 4.6 SDK and Viewer 3.0. We get this error message when we try to run the print widget and the map service which the error message points to is our basemap cached map service.

The architecture is a reverse proxy, so the web app code actually resides on the ArcGIS server. The web server forwards the request to the app server. We have also installed Web Adaptor on our arcgis server.

What could be causing this error message?

Re: Export Web Map Task Error: "Unable to connect to map server..."

AndyLarkin1 — Wed, 15 May 2013 06:43:29 GMT

Hello, how you resolved this problem?

Re: Export Web Map Task Error: "Unable to connect to map server..."

SharonGin1 — Wed, 15 May 2013 06:48:51 GMT

We did figure it out eventually. We realised that we had to point the domain name to the GIS server's IP address in the host file of the GIS server. We do that by adding 1 line in the host file which contained the GIS server IP address and space, followed by the domain url.

Re: Export Web Map Task Error: "Unable to connect to map server..."

AndyLarkin1 — Wed, 15 May 2013 07:06:55 GMT

Thanx, May you show your host file, please
I configurated my host file C:\WINDOWS\system32\drivers\etc\hosts

127.0.0.1 localhost
172.20.12.21 oiv.gis....ru

but in total i get local address http://hv-ogv-app:6080/arcgis/rest/directories/arcgisoutput/Print/PrintingServices_GPServer/_ags_d51240f4e9a94d1ab0cf60460e0bd8ba1.jpg

Re: Export Web Map Task Error: "Unable to connect to map server..."

SharonGin1 — Wed, 15 May 2013 07:10:54 GMT

I'm not able to show my host file as there is sensitive information. but from what you provided, the entry of your host file should look like this

172.20.12.21 hv-ogv-app

Just to confirm the info, could you provide the rest link to your map service which throws this error?

Re: Export Web Map Task Error: "Unable to connect to map server..."

AndyLarkin1 — Wed, 15 May 2013 07:17:18 GMT

Sample with my printing tools http://jsfiddle.net/KZvyM/
error on arcgis server log

SEVERE 15.05.2013 14:15:04 Error executing tool. Print/PrintingServices.GPServer
SEVERE 15.05.2013 14:15:04 Layer "Ocean_Basemap_5301": Unable to connect to map server at http://services.arcgisonline.com/ArcGIS/rest/services/Ocean_Basemap/MapServer. Layer "LOJIC_LandRecords_Louisville_3326": Unable to connect to map server at http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Louisville/LOJIC_LandRecords_Louisville/MapServer. Failed to execute (ExportWebMap). Failed to execute (Export Web Map). Print/PrintingServices.GPServer

Re: Export Web Map Task Error: "Unable to connect to map server..."

KyleDixon — Wed, 15 May 2013 12:46:56 GMT

I was able to resolve the issue by logging in as agsadmin, the service account running the server then attempt to access arcgisonline via browser. Turns out, in our domain, service accounts aren't configured to be able to access the internet. All I had to do was open internet options and fill in proxy information.

Re: Export Web Map Task Error: "Unable to connect to map server..."

AndyLarkin1 — Wed, 15 May 2013 14:24:23 GMT

thanx,
may show to your service?

Re: Export Web Map Task Error: "Unable to connect to map server..."

HyrumErnstrom — Tue, 09 Jul 2013 22:15:59 GMT

I was able to resolve the issue by logging in as agsadmin, the service account running the server then attempt to access arcgisonline via browser. Turns out, in our domain, service accounts aren't configured to be able to access the internet. All I had to do was open internet options and fill in proxy information.

Where was the "All I had to do was open internet options and fill in proxy information".

Thanks

topic Re: Export Web Map Task Error: "Unable to connect to map server..." in ArcGIS JavaScript Maps SDK Questions

Export Web Map Task Error: &quot;Unable to connect to map server...&quot;

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Re: Export Web Map Task Error: "Unable to connect to map server..."

Export Web Map Task Error: "Unable to connect to map server..."