We've been having a problem with the app pool for a DNN host dying which of course brings down all the sites associated with it.  This error is showing up multiple times in the application log for the server related to that host.  The host is running 8.3. Please advise ... any ideas on what this means?

Event message: An unhandled exception has occurred.
 
Exception information:
    Exception type: LockRecursionException
    Exception message: Recursive read lock acquisitions not allowed in this mode.
   at System.Threading.ReaderWriterLockSlim.TryEnterReadLockCore(TimeoutTracker timeout)
   at System.Threading.ReaderWriterLockSlim.TryEnterReadLock(TimeoutTracker timeout)
   at DotNetNuke.Collections.Internal.ReaderWriterLockStrategy.GetReadLock(TimeSpan timeout)
   at DotNetNuke.Common.Utilities.DataCache.GetCachedDataFromDictionary(CacheItemArgs cacheItemArgs, CacheItemExpiredCallback cacheItemExpired)
   at DotNetNuke.Common.Utilities.DataCache.GetCachedData[TObject](CacheItemArgs cacheItemArgs, CacheItemExpiredCallback cacheItemExpired, Boolean storeInDictionary)
   at DotNetNuke.Entities.Controllers.HostController.GetSettings()
   at DotNetNuke.Entities.Controllers.HostController.GetString(String key, String defaultValue)
   at DotNetNuke.Entities.Controllers.HostController.GetString(String key)
   at DotNetNuke.Entities.Urls.RewriterUtils.OmitFromRewriteProcessing(String localPath)
   at DotNetNuke.Common.Initialize.ProcessHttpModule(HttpRequest request, Boolean allowUnknownExtensions, Boolean checkOmitFromRewriteProcessing)
   at DotNetNuke.HttpModules.RequestFilter.RequestFilterModule.FilterRequest(Object sender, EventArgs e)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

 

Thread information:
    Stack trace:    at System.Threading.ReaderWriterLockSlim.TryEnterReadLockCore(TimeoutTracker timeout)
   at System.Threading.ReaderWriterLockSlim.TryEnterReadLock(TimeoutTracker timeout)
   at DotNetNuke.Collections.Internal.ReaderWriterLockStrategy.GetReadLock(TimeSpan timeout)
   at DotNetNuke.Common.Utilities.DataCache.GetCachedDataFromDictionary(CacheItemArgs cacheItemArgs, CacheItemExpiredCallback cacheItemExpired)
   at DotNetNuke.Common.Utilities.DataCache.GetCachedData[TObject](CacheItemArgs cacheItemArgs, CacheItemExpiredCallback cacheItemExpired, Boolean storeInDictionary)
   at DotNetNuke.Entities.Controllers.HostController.GetSettings()
   at DotNetNuke.Entities.Controllers.HostController.GetString(String key, String defaultValue)
   at DotNetNuke.Entities.Controllers.HostController.GetString(String key)
   at DotNetNuke.Entities.Urls.RewriterUtils.OmitFromRewriteProcessing(String localPath)
   at DotNetNuke.Common.Initialize.ProcessHttpModule(HttpRequest request, Boolean allowUnknownExtensions, Boolean checkOmitFromRewriteProcessing)
   at DotNetNuke.HttpModules.RequestFilter.RequestFilterModule.FilterRequest(Object sender, EventArgs e)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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- GhostTruth.com

Thanks for the tip Sebastian, .net account permissions are good - we've been looking into the conflicting processes possibility

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- GhostTruth.com