Hi Scott,

Curious, have you had anybody report a memory leak with any of your recent module upgrades?

I have been battling a issue which WH4L has identified on my justnorth.com site. It is consuming memory like crazy.

I don't want to make this sound like it is any of your modules causing the issue. I am trying to isolate the problem. The reason I ask the question is that the issue began two weeks ago and the only modules I have added, in that period, are upgrades to your mods. Just trying to troubleshoot.

WH4L says:

Actually, I checked your server memory allocation, it seems like aspnet pool2 is using large memory, about 180mb and increasing, but it only serve 2 sites, jivemg.com and justnorth.com, I have seperate them into different pools and justnorth.com is actually the application that consume the most resource.

It is not really about sharing application pool problem though. I can create another application pool and seperate those 2 sites so you can identify them.

All the evidence pointing to justnorth.com, right after iisreset, justnorth used about 100mb and increasing fast as I browse / refresh the page.

Any ideas on how to troubleshoot this?

Best regards,
Buck

Good question. I will ask them.

The site has been down again all afternoon. They want me to purchase another 100 mb of memory to put a band aid on it until they can get the site stable.

It seems that all you have to do is make a dozen callbacks and the site goes down.

In DNN 4.7.0, i know there were 2 memory leak issues that were fixed.

DNN-6000 Ajax.Isinstalled causes System.OutOfMemory exception

and

DNN-6372 CacheDependency Memory Leak

Maybe this will help you troubleshoot or even solve your problem.

Buck,

I just sent you a personnal message... I had similar problem in the past with another hosting provider, and my website was regularly stopped to avoid crashing the server... :-(

DV

Buck

We had a customer with a similar issue recently on one of our servers.

It turned out to be the GX-Chat and GX-WhosThere modules. Are you running either of those?

Your host should have tools to be able to tell which scripts are causing problems and chewing up memory.

Regards

Simon

Hi Simon,

Thanks for sharing the info.

Although I do not use either of the modules you mention, I am wondering if Scott's Who's On Line module might be having the same effect.

Any thoughts, Scott?

Hi Gary,

Thank you for the info. I have upgraded our two most trafficked sites to DNN 4.70 and added a 100mb of memory to each. This has seemed to curb the out-of-memory errors.

Before i upgraded to DNN 4.70 (last night), I was continually getting the following SQL database errors when performing administrative tasks. Most often when performing callbacks. I also see, from the log file, that is has been occurring when being spidered by Yahoo Slurp. Any information on this?

System.Exception: Unhandled Error: ---> System.Data.SqlClient.SqlException: A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParserStateObject.ThrowExceptionAndWarning() at System.Data.SqlClient.TdsParserStateObject.WriteSni() at System.Data.SqlClient.TdsParserStateObject.WritePacket(Byte flushMode) at System.Data.SqlClient.TdsParserStateObject.ExecuteFlush() at System.Data.SqlClient.TdsParser.TdsExecuteRPC(_SqlRPC[] rpcArray, Int32 timeout, Boolean inSchema, SqlNotificationRequest notificationRequest, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior) at Microsoft.ApplicationBlocks.Data.SqlHelper.ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, String commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership) at Microsoft.ApplicationBlocks.Data.SqlHelper.ExecuteReader(String connectionString, CommandType commandType, String commandText, SqlParameter[] commandParameters) at Microsoft.ApplicationBlocks.Data.SqlHelper.ExecuteReader(String connectionString, String spName, Object[] parameterValues) at DotNetNuke.Data.SqlDataProvider.GetTabModules(Int32 TabId) at DotNetNuke.Entities.Modules.ModuleController.GetTabModules(Int32 TabId) at DotNetNuke.Entities.Portals.PortalSettings.GetPortalSettings(Int32 TabId, PortalAliasInfo objPortalAliasInfo) at DotNetNuke.Entities.Portals.PortalSettings..ctor(Int32 tabId, PortalAliasInfo objPortalAliasInfo) at Ventrian.FriendlyUrl.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 ---

Best regards,
Buck

Hi Buck,

That error is a General Error with TCP connections to the SQL Server and is very hard to troubleshoot. Its cause can be anything from networking issues to SQL Server Configuration to the way DNN is opening and closing connections to the SQL Server.

I am not sure how yahoo slurp spider would cause you to get that error. From what i have seen in my own logs is that it only gets spidered by a couple of spiders at one time, and shouldn't be hammering your site. Googlebot i have heard can get out of hand, hitting a site with thousands of spiders and can slow your site down or even bring it down.

So, is your site working ok now? Are you still getting that error after upgrading to DNN 4.7.0?

Hi Gary,

Again, thanks for taking the time to respond. I will be tracking this carefully. To date, the two sites that have been upgraded to DNN 4.7.0 have not prompted the error.

Hi Scott,

I am understanding your comment to say that 'Where Are They' can be ruled out as a cause of the problem, correct?

Wow robax, thanks a lot, looks great this inventua module.

One question, you said:

That issue where the site can't recycle at all seems to happen when it simply runs out of allocated memory. It freezes up and won't return until it has crashed itself. The only way to deal with it is tweaking the recycling triggers. If you don't let your portal reach the limit, it basically won't run into trouble... even with a bad module. You can see the memory exceptions in the application log in the module mentioned and also often in the DNN event viewer.

I am not sure that I have understood everything (I am french...). But it seems to me that it is exactly what's happenning. It can not recycle at all, running out of allocated memory and it freezes and do not return until it crash (sometimes it takes a huge amount of time, more than 30 minutes). So, HOW DO YOU TWEK the recycling trigger ????

DV

Very interesting, thanks a lot !!

 I have just sent you an email robax, I can not continue like that with WH4L, 1 hour downtime each day, not possible anymore.... I am very very sad, I thought they were very serious, no news for 4 days now... (2 tickets opened, many chat discussion with technician, seems they can not host DNN ..)

DV