NotificationsCreate fails with status code 500

[mike_meirovitz]

Hi,

Sometimes when our EBO OPC Server calls the NotificationCreate API, the returned status code is 500. Other calls with the same SubscriptionId returns status code 200. See below. 

No Error:

=======

21:04:32,742 [CM] INFO SEEwsRestApi - NotificationsCreate, SubscriptionId = '0b06b335-c830-42c2-a030-8b3ae3c7324c'
21:04:32,754 [CM] INFO SEEwsRestApi - NotificationsCreate pass, NotificationId = 'FD633AB5836541BBB5EB6D956F105B34'
21:04:32,756 [CM] INFO SEEwsRestApi - GetNotificationItems, NotificationId = 'FD633AB5836541BBB5EB6D956F105B34'
21:04:32,766 [CM] INFO SEEwsRestApi - GetNotificationItems, status code = 200, Response = '[]'
21:04:32,766 [CM] INFO SEEwsRestApi - GetNotificationItems, # of change items 0

Error:

======

21:04:34,344 [CM] INFO SEEwsRestApi - NotificationsCreate, SubscriptionId = '0b06b335-c830-42c2-a030-8b3ae3c7324c'
21:04:34,360 [CM] ERROR SEEwsRestApi - WebRequestPostData after GetResponse(), status code = InternalServerError 500
21:04:34,360 [CM] ERROR SEEwsRestApi - NotificationsCreate fail, rc = -1, status code = 500

Can someone explain this behavior? What is the meaning of status code 500? Why are we getting this status code?

Thank you.

Mike

[JeffBowman]

Hi Michael,

500 is an HTTP "Internal Server Error", which is basically just a catch all. I would recommend turning on REST Serve, and EWS Consume logging in Smart Connector, and see what the Smart Connector log is actually returning.

Best Regards,

-Jeff

[mike_meirovitz]

Hi Jeff,

Thank you. We'll do.

Can you see an error in the attached log file?

Thanks.

Mike

[mike_meirovitz]

Hi Jeff,

After adding REST Serve and EWS Consume logging in Smart Connector, this is what I see in the SmartConnector log:

2021-03-16 09:12:12.1685,Error,EwsConsume,admin,The HTTP request is unauthorized with client authentication scheme 'Digest'. The authentication header received from the server was 'Digest realm="ews@SxWBM",qop="auth",algorithm="SHA-256",nonce="E3C71D3DF7BE771B154F605D5496E0434E642B147C003B0F85BB3D1DFE2AC58ECC6A4AE352C18399A19917AF",opaque="532720"'.
The remote server returned an error: (401) Unauthorized.

Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ValidateAuthentication(HttpWebRequest request, HttpWebResponse response, WebException responseException, HttpChannelFactory`1 factory)
at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory`1 factory, WebException responseException, ChannelBinding channelBinding)
at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at Ews.Client.IDataExchange.GetNotification(GetNotificationRequest1 request)
at Ews.Client.DataExchangeClient.GetNotification(GetNotificationRequest request)
at Ews.Client.EwsClient.ExecuteAndLogCall[TRequest,TResponse](String methodName, TRequest request, Func`2 methodToLog)
,["GetNotification","352b0cc8-9a5e-4992-9327-2bae4a4aa440"],

See the attached SmartConnector log file.

Thank you.

Mike

[JeffBowman]

Hi Michael,

What version of EBO is this happening on?

Best Regards,

-Jeff

[mike_meirovitz]

Hi Jeff,

The version is 2.4.25.

Thank you.

Mike

[JeffBowman]

Hi Michael,

That looks like a Smart Connector version, do you also have the EBO version?

Best Regards,

-Jeff

[mike_meirovitz]

Hi Jeff,

EBO version is 3.1.

Thank you.

Mike