[Mono-dev] Exception on ASP.NET startup

[Bassam Tabbara]

Hello,

We see the following exception every other day on our front end servers:

System.ArgumentException: Key duplication when adding: sessionState
  at System.Collections.Hashtable.PutImpl (System.Object key, System.Object value, Boolean overwrite) [0x00000] in <filename unknown>:0
  at System.Collections.Hashtable.Add (System.Object key, System.Object value) [0x00000] in <filename unknown>:0
  at System.Collections.Specialized.NameObjectCollectionBase.BaseAdd (System.String name, System.Object value) [0x00000] in <filename unknown>:0
  at System.Collections.Specialized.NameObjectCollectionBase.BaseSet (System.String name, System.Object value) [0x00000] in <filename unknown>:0
  at System.Configuration.ConfigurationSectionCollection.get_Item (System.String name) [0x00000] in <filename unknown>:0
  at System.Configuration.Configuration.GetSection (System.String path) [0x00000] in <filename unknown>:0
  at System.Web.Configuration.WebConfigurationManager.GetSection (System.String sectionName, System.String path, System.Web.HttpContext context) [0x00000] in <filename unknown>:0
  at System.Web.Configuration.WebConfigurationManager.GetSection (System.String sectionName) [0x00000] in <filename unknown>:0
  at System.Web.SessionState.SessionStateModule.Init (System.Web.HttpApplication app) [0x00000] in <filename unknown>:0
  at System.Web.Configuration.HttpModulesSection.LoadModules (System.Web.HttpApplication app) [0x00000] in <filename unknown>:0
  at System.Web.HttpApplication.InitOnce (Boolean full_init) [0x00000] in <filename unknown>:0

Seems like there is a race with ASP.NET startup on multi-core machines. We are running 2-10 bits.

Anyone seen this before?

Thanks!
Bassam
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