GeneralCommunicationException with communication error WebSocketConnectionNotAccepted and http error

[litalrok7]

Hi All,

We're trying to connect to qlik sense server and retrieve apps’ data. When trying to get qlik’s apps list we receive this error message:

Connection failed after 4 attempts. Unable to keep connection open: Failed to ensure open connection: GeneralCommunicationException with communication error WebSocketConnectionNotAccepted and http error code 500

• I have added my host to web socket white list in virtual proxy.

• Checked if Connection port is right

• Proxy Allow HTTP connection

• User has Root Admin access in QMC

Advise \ help will be highly appreciated!!

Here is code example of connection:

location = Qlik.Engine.Location.FromUri(new Uri("http://[host]:[port]"));

location.VirtualProxyPath = "proxyName";

bool ssl = (protocol.Equals("https") || protocol.Equals("wss"));

NetworkCredential netCred = new NetworkCredential(userName, Password);

if (ssl)

{

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls |

SecurityProtocolType.Tls11 |

SecurityProtocolType.Tls12;

}

location.AsNtlmUserViaProxy(ssl, netCred);

[vivek_gajjar01]

Have you tried inputting the name of the virtual proxy in the location.VirtualProxyPath = "proxyName" ? As this sound to me like there is an issue connecting via the Virtual Proxy. The proxy name can be found within the QMC -> Virtual Proxy -> Selecting the Virtual Proxy -> Under the Prefix section whatever the name is in this section you would replace the "proxyName" value with. Alternatively you can try  location.VirtualProxyPath = "static";

https://help.qlik.com/en-US/sense-developer/April2019/Subsystems/NetSDKAPI/Content/Sense_NetSDKAPI/C...