topic Re: Layer.OnInitializationFailed - Protocol Violation WebException in ArcGIS Runtime SDK for WPF (Retired) Questions https://community.esri.com/t5/arcgis-runtime-sdk-for-wpf-retired-questions/layer-oninitializationfailed-protocol-violation/m-p/40476#M175 <HTML><HEAD></HEAD><BODY><SPAN>We found a work-around on this issue.&nbsp; We had a couple layers that didn't handle the InitializationFailed event.&nbsp; Once we added a simple event handler, the issue seemed to go away.</SPAN></BODY></HTML> Wed, 24 Jul 2013 12:59:18 GMT BrianRassier 2013-07-24T12:59:18Z Layer.OnInitializationFailed - Protocol Violation WebException https://community.esri.com/t5/arcgis-runtime-sdk-for-wpf-retired-questions/layer-oninitializationfailed-protocol-violation/m-p/40475#M174 <HTML><HEAD></HEAD><BODY><SPAN>When using secure ArcGIS Online services, we've been noticing seemingly random cases where the layer initialization fails due to a WebException, noting that "the server committed a protocol violation".&nbsp; It's not terribly frequent (about 1 out of 20 times) - and it doesn't happen outside of secure ArcGIS Online services.&nbsp; Has anyone else seen this?&nbsp; The unhandled exception is below:</SPAN><BR /><BR /><PRE class="plain" name="code">System.Net.WebException: The server committed a protocol violation. Section=ResponseStatusLine &nbsp;&nbsp; at ESRI.ArcGIS.Client.Layer.OnInitializationFailed(EventArgs e) &nbsp;&nbsp; at ESRI.ArcGIS.Client.Layer.Initialize() &nbsp;&nbsp; at ESRI.ArcGIS.Client.FeatureLayer.&lt;Initialize&gt;b__6c(FeatureLayerInfo layerinfo, Exception error) &nbsp;&nbsp; at ESRI.ArcGIS.Client.FeatureService.FeatureLayerInfo.&lt;&gt;c__DisplayClass2.&lt;Get&gt;b__1(Object a, RequestEventArgs b) &nbsp;&nbsp; at ESRI.ArcGIS.Client.WebRequest.OnComplete(RequestEventArgs args) &nbsp;&nbsp; at ESRI.ArcGIS.Client.WebRequest.downloadStringCompleted(Object sender, DownloadStringCompletedEventArgs e, Action retryCallback) &nbsp;&nbsp; at ESRI.ArcGIS.Client.WebRequest.&lt;&gt;c__DisplayClass1d.&lt;BuildClient&gt;b__1b(Object s, DownloadStringCompletedEventArgs e)</PRE></BODY></HTML> Thu, 27 Jun 2013 15:02:29 GMT https://community.esri.com/t5/arcgis-runtime-sdk-for-wpf-retired-questions/layer-oninitializationfailed-protocol-violation/m-p/40475#M174 BrianRassier 2013-06-27T15:02:29Z Re: Layer.OnInitializationFailed - Protocol Violation WebException https://community.esri.com/t5/arcgis-runtime-sdk-for-wpf-retired-questions/layer-oninitializationfailed-protocol-violation/m-p/40476#M175 <HTML><HEAD></HEAD><BODY><SPAN>We found a work-around on this issue.&nbsp; We had a couple layers that didn't handle the InitializationFailed event.&nbsp; Once we added a simple event handler, the issue seemed to go away.</SPAN></BODY></HTML> Wed, 24 Jul 2013 12:59:18 GMT https://community.esri.com/t5/arcgis-runtime-sdk-for-wpf-retired-questions/layer-oninitializationfailed-protocol-violation/m-p/40476#M175 BrianRassier 2013-07-24T12:59:18Z