[Mono-list] System.Threading.Timer issue in v2.6.7 asp.net

Aldo Prinzi aldo.prinzi at gmail.com
Thu Jul 22 18:58:22 EDT 2010

Hi all,
We have an ASP.NET application that runs in production using v2.6.4
We don't have any issue whit that version and everithing is good.

Our sw runs on Linux Slackware 13 @ 64 bit (
Apache 2.2.15

We have a virtual machine that mirror our server and we have tried to 
upgrade it to the new 2.6.7 (mono and xsp, no GUI)
Now, sometimes -really randomic- when we refresh the request to our 
dynamic content, we experience the following issue:
   Key 'System.Threading.Timer' already exists in list.
at System.Collections.SortedList.PutImpl (System.Object key, 
System.Object value, Boolean overwrite) [0x00000] in <filename unknown>:0
at System.Collections.SortedList.Add (System.Object key, System.Object 
value) [0x00000] in <filename unknown>:0
at System.Threading.Timer+Scheduler.Add (System.Threading.Timer timer) 
[0x00000] in <filename unknown>:0
at System.Threading.Timer+Scheduler.Change (System.Threading.Timer 
timer, Int64 new_next_run) [0x00000] in <filename unknown>:0
at System.Threading.Timer.Change (Int64 dueTime, Int64 period, Boolean 
first) [0x00000] in <filename unknown>:0
at System.Threading.Timer.Change (Int64 dueTime, Int64 period) [0x00000] 
in <filename unknown>:0
at (wrapper remoting-invoke-with-check) System.Threading.Timer:Change 
at System.Web.Caching.Cache.Get (System.String key) [0x00000] in 
<filename unknown>:0
We don't use any "timer" then we have stopped further tests.
Can anyone knows what this can be?

Thank you in advance.
Aldo Prinzi

"If you are thinking one year ahead, sow seed.
If you are thinking ten years ahead, plant a tree.
If you are thinking one hundred years ahead, educate the people."
                                Kuan Tze, Chinese poet, 400 B.C.

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