I have been having issues with a memory leak in DNN 4.4.1 I have seen threads about memory leaks, but all of these point to the events module or to the blog module as the culprit. I do not have either installed on my site. I am running DNN 4.4.1 with SQL 2000 on windows 2003. I have Active Directory authentication turned on, and have the AD fix installed for 441. When the application is started, the w3wp.exe process on the Web serve shows that is it consuming approx 55 MB of Memory. As the site continues running the memory usage can reach up to 180MB before it starts throwing the error below. I get one of these for every log on, and module load event, and it quickly fills up the logs as well as making the site unusable. Restarting the Application from Host settings will not fix the issue, I have to log into the web server and restart the w3wp.exe process that is using all of the memory. It is getting to the point where I have to restart the process 2 or 3 times a day. I get anywhere from 1500 to 2500 hits a day on this particular site. Any help on solving this would be appreciated.

AssemblyVersion: 04.04.01
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL: /portal/Default.aspx?tabid=36&error=Exception+of+type+'System.OutOfMemoryException'+was+thrown.&content=0
AbsoluteURL: /portal/Default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.1)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: e5bc5083-d75c-40eb-9ce2-dc41ece9e93d
InnerException: Unhandled Error:
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Web.Caching.UsageBucket.Expand
StackTrace:
Message: System.Exception: Unhandled Error: ---> System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. at System.Web.Caching.UsageBucket.Expand() at System.Web.Caching.UsageBucket.AddCacheEntry(CacheEntry cacheEntry) at System.Web.Caching.CacheSingle.UpdateCache(CacheKey cacheKey, CacheEntry newEntry, Boolean replace, CacheItemRemovedReason removedReason, Object& valueOld) at System.Web.Caching.CacheMultiple.UpdateCache(CacheKey cacheKey, CacheEntry newEntry, Boolean replace, CacheItemRemovedReason removedReason, Object& valueOld) at System.Web.Caching.CacheInternal.DoInsert(Boolean isPublic, String key, Object value, CacheDependency dependencies, DateTime utcAbsoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemoveCallback, Boolean replace) at System.Web.Caching.Cache.Insert(String key, Object value, CacheDependency dependencies) at DotNetNuke.Services.Cache.FileBasedCachingProvider.FBCachingProvider.Insert(String CacheKey, Object objObject, Boolean PersistAppRestart) at DotNetNuke.Entities.Portals.PortalController.GetPortalDictionary() at DotNetNuke.Entities.Portals.PortalController.GetPortal(Int32 PortalId) at DotNetNuke.Entities.Tabs.TabInfo.get_IsAdminTab() at DotNetNuke.Entities.Portals.PortalSettings.GetPortalSettings(Int32 TabId, PortalAliasInfo objPortalAliasInfo) at DotNetNuke.Entities.Portals.PortalSettings..ctor(Int32 tabId, PortalAliasInfo objPortalAliasInfo) at DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace ---
Source:
Server Name:

I have caching turned off on all modules for the moment due to that being the fix suggested in the other posts I have read. With caching turned off, it shouldn't do this should it?

All I know is that more than once a day I have to recycle the w3wp.exe process due to this error. I just started receiving the error after 8 months of the site running on the same server. If I let it go, the site becomes unusable. There is a memory leak somewhere and I would like to figure out where it is. I have turned off caching on all modules that are on the site. The 180 MB is generally the rule of thumb that I use now as a point to restart w3wp.exe . It has reached much higher than that if left unchecked. It continually climbs and nothing I have done has gotten it to stop. Any help on resolving this issue would be greatly appreciated.