SharePoint User Group UK

Hi all,

I have been developing workflows for some time now and have noticed that in the logs of my SharePoint server are many of the following errors:

Unexpected ERROR: request not found in the TrackedRequests. We might be creating and closing webs on different threads. ThreadId = 30, Free call stack =    at Microsoft.SharePoint.SPRequestManager.Release(SPRequest request)     at Microsoft.SharePoint.SPSite.Close()     at Microsoft.SharePoint.SPSite.Dispose()     at MinorWFStateMachine_v1_1Test.Workflow1.<CheckDocumentsPOA_ExecuteCode>b__1()     at Microsoft.SharePoint.SPSecurity.CodeToRunElevatedWrapper(Object state)     at Microsoft.SharePoint.SPSecurity.<>c__DisplayClass4.<RunWithElevatedPrivileges>b__2()     at Microsoft.SharePoint.Utilities.SecurityContext.RunAsProcess(CodeToRunElevated secureCode)     at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param)     at Microsoft.SharePoint.SPSecurity.RunWi... 
09/02/2008 13:24:34.45* OWSTIMER.EXE (0x0B4C)                    0x1AB4 Windows SharePoint Services    General                        0 Unexpected ...thElevatedPrivileges(CodeToRunElevated secureCode)     at MinorWFStateMachine_v1_1Test.Workflow1.CheckDocumentsPOA_ExecuteCode(Object sender, EventArgs e)     at System.Workflow.ComponentModel.Activity.RaiseEvent(DependencyProperty dependencyEvent, Object sender, EventArgs e)     at System.Workflow.Activities.CodeActivity.Execute(ActivityExecutionContext executionContext)     at System.Workflow.ComponentModel.ActivityExecutor`1.Execute(T activity, ActivityExecutionContext executionContext)     at System.Workflow.ComponentModel.ActivityExecutor`1.Execute(Activity activity, ActivityExecutionContext executionContext)     at System.Workflow.ComponentModel.ActivityExecutorOperation.Run(IWorkflowCoreRuntime workflowCoreRuntime)     at System.Workflow.Runtime.Scheduler.Run()     at System.Workflo... 

Does anyone know what these mean? This particular one came up today but is for a workflow that is no longer used. I try to dispose variables wherever possible with 'using' statements.

Thanks,

Alex

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My New SharePoint Blog - http://sharepointcoding.wordpress.com

MCP: Windows XP

Hi Alex,

Are you using SPSecurity.RunWithElevatedPrivileges?  Have you read Daniel Larson's blog about using SPUserToken instead http://daniellarson.spaces.live.com/Blog/cns!D3543C5837291E93!1919.entry.

Another thought, which objects are you trying to dispose of?  The best practice of disposing objects in SharePoint http://msdn.microsoft.com/en-us/library/aa973248.aspx states you can't dipose of objects directly access via the current context.  For example:

SPSite currentSite = SPControl.GetContextSite(Context);
currentSite.Dispose();

The code above currentSite.Dispose(); would cause issues with SharePoint.

Hope this helps

Dave

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My SharePoint Blog www.davehunter.co.uk/blog

Hi Dave,

I am using the SPSecurity.RunWithElevatedPrivileges, so I will have a look of using the SPUserToken instead. I have diposed the objects correctly I believe but I will double check my code.

Thanks,

Alex

---

My New SharePoint Blog - http://sharepointcoding.wordpress.com

MCP: Windows XP

Alex,

When you call the RunWithElevatedPriviledges, are you creating a new SPSite object? (As you should do for security.) Is it this that's getting disposed of in the wrong place perhaps?

Paul.

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www.myfatblog.co.uk
MCTS: WSS 3.0
MCTS: MOSS 2007

Paul,

This is one example of where I call the RunWithElevatedPrivaledges code:

private void CheckDocumentsPOA_ExecuteCode(object sender, EventArgs e)

{

//Run the check with elevated security

SPSecurity.RunWithElevatedPrivileges(delegate()

{

string ER;

SPListItem item = workflowProperties.Item;

ER = item["ER"].ToString();

using (SPSite site = workflowProperties.Site)

{

 

using (SPWeb web = site.OpenWeb(ER))

{

SPList list = web.Lists["Purchase Order Data"];

//Check if there is at least 1 item in the subsite

if (list.Items.Count >= 1)

{

//Set our boolean variable to true

hasDocumentsPOA = true;

}

else

{

//Set our boolean variable to false

hasDocumentsPOA = false;

}

}

}

});

}

 

Cheers

Alex

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My New SharePoint Blog - http://sharepointcoding.wordpress.com

MCP: Windows XP

Ok, well if whats happening as I think it is, then the problem could be the using statements around the new SPSite and SPWeb objects.

Firstly, I found out the other day that if you're wrapping your SPSite in a using statement, and then using that to create an SPWeb, you don't need to dispose of the SPWeb as the using statement around SPSite will fix that.. so thats one less USING to worry about.

The other thing is the source of workflowProperties.Site. I'm not 100% certain whether this object counts as coming from SPContext or not. If it is, then you don't want to dispose of it. Can anyone shed some light on this for us?

Paul.

---

www.myfatblog.co.uk
MCTS: WSS 3.0
MCTS: MOSS 2007