Our website has been down since yesterday. We have a beta and production version of the site, and we are seeing problems with both. We can't determine if we are under some kind of denial of service attack, or if some errors in DNN are a clue to our problem. We are running DNN 5.6.2.

The site & DB seem fine, however, as soon as we add traffic from the outside to any of our prod corp sites, no matter the machine, the CPU pegs and everything goes down.  I have tried the sites in every given configuration I can think of, and nothing works.

We are seeing the following errors in our logs for the production server:

AssemblyVersion: 5.6.2
PortalID: 0
PortalName: NewsGator
UserID: -1
UserName:
ActiveTabID: 40
ActiveTabName: Home
RawURL: /Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer:
UserAgent:
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 237660db-a135-44ff-b607-4bcfd5cd9f91
InnerException: The file 'C:\inetpub\newsgator.corp\Portals\0\Cache\Pages\86_ACABA51644A302FBB325E30E7931BAF8.data.resources' already exists.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.IO.__Error.WinIOError
StackTrace:
Message: System.IO.IOException: The file 'C:\inetpub\newsgator.corp\Portals\0\Cache\Pages\86_ACABA51644A302FBB325E30E7931BAF8.data.resources' already exists. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access) at DotNetNuke.Services.ModuleCache.FileProvider.SetModule(Int32 tabModuleId, String cacheKey, TimeSpan duration, Byte[] output)
Source:
Server Name: NGWEB5

and

AssemblyVersion: 5.6.2
PortalID: 0
PortalName: NewsGator
UserID: -1
UserName:
ActiveTabID: 76
ActiveTabName: Solutions
RawURL: /solutions.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.sexymama.com/
UserAgent: Lycos
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 1c301638-0f96-4afb-9651-c7ff52dd103d
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DNNStuff.Aggregator.Compatibility.InjectIntoTabs
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DNNStuff.Aggregator.Compatibility.InjectIntoTabs(Aggregator agg, LoadEventType LoadEvent, AggregatorInfo ai, Int32 currentTabNumber) at DNNStuff.Aggregator.Aggregator.InjectIntoTabsNonPartialRendering() at DNNStuff.Aggregator.Aggregator.Page_Load(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---
Source:
Server Name: NGWEB5

Any advice is appreciated!

Thanks, Chris. We have been working with support all morning. I had posted to the forum over the weekend in hopes of getting help sooner. We are still working on it...