Lots of ASP .NET 4 Warning Events ID 1309 unhandled exception

Versions / Builds Affected

2012 (both versions, builds 20120305, 20120618)

Status

Resolved

Problem Summary

Hundreds of ASP .NET 4 Warning Events (Event ID 1309) are seen in the application event log.

TT / JIRAID

17

How to Identify

The following events are in the application event log and no other adverse problems are noted: Event Type: Warning Event Source: ASP.NET 4.0.30319.0 Event Category: Web Event Event ID: 1309 Date: 26/03/2012 Time: 3:14:48 PM User: N/A Computer: Webmonitor Description: Event code: 3005 Event message: An unhandled exception has occurred. Event time: 26/03/2012 3:14:48 PM Event time (UTC): 26/03/2012 4:44:48 AM Event ID: d5973e941ebd4cef9651aa5d93620091 Event sequence: 3894 Event occurrence: 45 Event detail code: 0 Application information: Application domain: /LM/W3SVC/1/ROOT-1-129769346146250000 Trust level: Full Application Virtual Path: / Application Path: C:\Program Files\GFI\WebMonitor\WebUI\ Machine name: SECURITY-SERVER Process information: Process ID: 3024 Process name: iisexpress.exe Account name: D-ADEL-001\Administrator Exception information: Exception type: HttpException Exception message: Session state has created a session id, but cannot save it because the response was already flushed by the application. at System.Web.SessionState.SessionIDManager.SaveSessionID(HttpContext ...

Workaround / Fix Details

Development has issued a patches: Patch for build 20120305 It can be found here: http://ftp.gfisoftware.com/patches/WEBMON2012/20120305/WM2012_PATCH_20120516_01.zip Patch for SR1 (build 20120618): http://ftp.gfisoftware.com/patches/WEBMON2012/WM2012_PATCH_20120801_01.zip Note: This fix will be included in GFI Webmonitor 2012 R2 (Sept 2012)

Required Actions

Have the customer apply the patch.