Hi,
Wanted to check this warning events flooding in the CAS servers every one minute,
Exchange 2013 CU8
Source: ASP.NET 4.0.30319.0
Event ID: 1309
Event code: 3005
Event message: An unhandled exception has occurred
Application information:
Application domain: /LM/W3SVC/1/ROOT/owa-1-131197326803270452
Trust level: Full
Application Virtual Path: /<g class="gr_ gr_129 gr-alert gr_spell gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="129" id="129">owa</g>
Application Path: D:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\
Machine name: <g class="gr_ gr_130 gr-alert gr_spell gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="130" id="130">xxxxxxxxx</g>
Exception information:
Exception type: HttpException
Exception message: Server cannot append header after HTTP headers have been sent.
at System.Web.HttpHeaderCollection.SetHeader(String name, String value, Boolean replace)
at Microsoft.Exchange.Diagnostics.WorkloadManagement.Implementation.ActivityScopeImpl.SerializeTo(HttpResponse httpResponse)
at Microsoft.Exchange.HttpProxy.ProxyModule.<>c__DisplayClass8.<OnBeginRequest>b__7()
at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, FilterDelegate filterDelegate, CatchDelegate catchDelegate)
at Microsoft.Exchange.HttpProxy.Diagnostics.SendWatsonReportOnUnhandledException(MethodDelegate methodDelegate, LastChanceExceptionHandler exceptionHandler)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: https://localhost:443/OWA/auth.owa
Request path: /OWA/auth.owa
User host address: ::1
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\SYSTEM
Thread information:
Thread ID: 22
Thread account name: NT AUTHORITY\SYSTEM
Is impersonating: False
Stack trace: at System.Web.HttpHeaderCollection.SetHeader(String name, String value, Boolean replace)
at Microsoft.Exchange.Diagnostics.WorkloadManagement.Implementation.ActivityScopeImpl.SerializeTo(HttpResponse httpResponse)
at Microsoft.Exchange.HttpProxy.ProxyModule.<>c__DisplayClass8.<OnBeginRequest>b__7()
at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, FilterDelegate filterDelegate, CatchDelegate catchDelegate)
at Microsoft.Exchange.HttpProxy.Diagnostics.SendWatsonReportOnUnhandledException(MethodDelegate methodDelegate, LastChanceExceptionHandler exceptionHandler)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously).
Thanks in Advance