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DB2 - Problem description

Problem IC80336 Status: Closed

SYSTEM.OBJECTDISPOSEDEXCEPTION IN IBM.DATA.DB2.DB2CONNPOOL.FINALIZE() WHEN
UNLOADING APPDOMAIN

product:
DB2 CONNECT / DB2CONNCT / 970 - DB2
Problem description:
When unloading an AppDomain in which the IBM.Data.DB2 provider 
was loaded and used, an ObjectDisposedException is 
intermittently encountered: 
 
Exception Information: System.ObjectDisposedException 
Stack: 
   at 
System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolea 
n ByRef) 
   at 
Microsoft.Win32.Win32Native.SetEvent(Microsoft.Win32.SafeHandles 
.SafeWaitHandle) 
   at System.Threading.EventWaitHandle.Set() 
   at IBM.Data.DB2.DB2Trace.CloseTraceConsole() 
   at IBM.Data.DB2.DB2ConnPool.FreeDB2ConnPool() 
   at IBM.Data.DB2.DB2ConnPool.Finalize() 
 
This error has not been observed as the default AppDomain closes 
(at process shutdown).  Instead, this error has been observed 
only in programs which host AppDomains that are unloaded.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Data Server Provider for .NET on Windows                     * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* When unloading an AppDomain in which the IBM.Data.DB2        * 
* provider                                                     * 
* was loaded and used, an ObjectDisposedException is           * 
* intermittently encountered:                                  * 
*                                                              * 
* Exception Information: System.ObjectDisposedException        * 
* Stack:                                                       * 
*    at                                                        * 
* System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Bo * 
* olean ByRef)                                                 * 
*    at                                                        * 
* Microsoft.Win32.Win32Native.SetEvent(Microsoft.Win32.SafeHan * 
* dles                                                         * 
* .SafeWaitHandle)                                             * 
*    at System.Threading.EventWaitHandle.Set()                 * 
*    at IBM.Data.DB2.DB2Trace.CloseTraceConsole()              * 
*    at IBM.Data.DB2.DB2ConnPool.FreeDB2ConnPool()             * 
*    at IBM.Data.DB2.DB2ConnPool.Finalize()                    * 
*                                                              * 
* This error has not been observed as the default AppDomain    * 
* closes                                                       * 
* (at process shutdown).  Instead, this error has been         * 
* observed                                                     * 
* only in programs which host AppDomains that are unloaded.    * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to Data Server Client 9.7.FP6                        * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows

Solution
Problem was first fixed in Version 9.7 Fix Pack 6
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC84218 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
09.12.2011
22.08.2012
22.08.2012
Problem solved at the following versions (IBM BugInfos)
9.7.FP6
Problem solved according to the fixlist(s) of the following version(s)
9.7.0.6 FixList