Error while enabling Session State Service on SharePoint 2010

There are some mysterios errors on my SharePoint farm. After reading tons of log files I found some hints to problems with the “Session State Service” of SharePoint 2010.

I found this Cmdlets in PowerShell for controlling this service:

Enable-SPSessionStateService 
Disable-SPSessionStateService
Get-SPSessionStateService
Set-SPSessionStateService

I tried to enable the service with the first Cmdlet. – This was the resulting error:

image

Error message: “Microsoft SharePoint Server session state could not find the Session State Service. Contact your farm administrator.”

There is no information about this error in the internet. (Till now Smile )

MY SOLUTION FOR MY PROBLEM (may be it does not help you in your special situation. It’s “experimental”!!!):

I created a PowerShell script for re-creating the Session State Service and its Service Application.

Before you go on: Make sure, the Windows service “ASP.NET State Service” is running. (I set it to start automatically during system startup.)

This is the resulting script:

#region Check x64 host
    if( [System.IntPtr]::Size -ne 8) {
      Write-Error "Please use a x64 PowerShell host!"
      return
    }
#endregion

#region Load SharePoint SnapIn and DLL
  Remove-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
  Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
  
  #Check available SharePoint Cmdlets
  if( (Get-Command -Noun SPWeb*) -eq $null ) {
    Write-Error "SharePoint SnapIn not loaded. SharePoint cmdlets missing!"
    return
  }
#endregion

cls

$farm = [Microsoft.SharePoint.Administration.SPFarm]::Local

$services = $farm.get_Services() #get all SharePoint services
$sessionStateService = ($services | ? { $_.TypeName -like "*session state*" } ) #find the existing Session State Service -> it was "NULL" for me!

if( $sessionStateService -eq $null ) {
    #Recreate the Service
    $newSessionStateService = New-Object Microsoft.Office.Server.Administration.SessionStateService ("", $farm)
    $newSessionStateService.Id = [System.Guid]::NewGuid()
    $newSessionStateService.Name=[String]::Empty
    $newSessionStateService.Update()
    $farm.Update()
    $newSessionStateService.Provision()
    $newSessionStateService.Name=[String]::Empty
    $newSessionStateService.Update()
}

$services = $farm.get_Services() 
$sessionStateService = ($services | ? { $_.TypeName -like "*session state*" } ) 

$servers=(Get-SPServer)

#Create service instances on all application servers of the SharePoint farm
$servers | % {
    if( $_.Role -eq "Application" ) {
      $currentSessionStateSvcOnServer = ($_.ServiceInstances | ? { $_.TypeName -like "*session state*" } ) 
      if( $currentSessionStateSvcOnServer -eq $null ) {
        #write-host $_.Name $server.Role $_.gettype().fullname
        
        #To create a service instance you must use a "protected" constructor
        [type]$t = "Microsoft.SharePoint.Administration.SPServiceInstance" -as "Type"
        $p = @( ("string" -as [Type]), ("Microsoft.SharePoint.Administration.SPServer" -as [Type]), 
                ("Microsoft.SharePoint.Administration.SPService" -as [Type]) )
        $c = $t.GetConstructor([System.Reflection.BindingFlags]::NonPublic -bor [System.Reflection.BindingFlags]::Instance,$null, $p, $null)
        #these are the parameters for creating a service instance by using the protected constructor
        [Object[]]$params = @([Object]"Session State Service Instance", 
                              [Object]([Microsoft.SharePoint.Administration.SPFarm]::Local.Servers[$_.Name]), 
                              [Object]([Microsoft.SharePoint.Administration.SPFarm]::Local.Services[$sessionStateService.Id]))
        $newSvcInstance = $c.Invoke($params)
        #update & provisioning
        $newSvcInstance.Update()
        $newSvcInstance.Provision()
      }
    }
}

if( (Get-SPSessionStateService -ErrorAction SilentlyContinue) -ne $null ) {
  Write-Host "Successfull :-)" -ForegroundColor Green
} else {
  Write-Host "Failed :-(" -ForegroundColor Red
}

After that, the “Enable-SPSessionStateService” works:

image

(Spend me 1 1/2 days.)


You can use this script to delete the Session State Service, e.g. if some script parts does not work as expected. ONCE MORE: USE IT CAREFULLY AND AT YOUR OWN RISK!!!

#region Check x64 host
    if( [System.IntPtr]::Size -ne 8) {
      Write-Error "Please use a x64 PowerShell host!"
      return
    }
#endregion

#region Load SharePoint SnapIn and DLL
  Remove-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
  Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
  
  #Check available SharePoint Cmdlets
  if( (Get-Command -Noun SPWeb*) -eq $null ) {
    Write-Error "SharePoint SnapIn not loaded. SharePoint cmdlets missing!"
    return
  }
#endregion

cls

$farm = [Microsoft.SharePoint.Administration.SPFarm]::Local

Get-SPServiceApplication | ? {$_.GetType().FullName -eq "Microsoft.Office.Server.Administration.SessionStateServiceApplication"} | Remove-SPServiceApplication 

$farm.Services | ? { $_.TypeName -like "*session state*" } | % {
  $_.Instances | % {
    $_.Delete()
  }
  $_.Delete()
}

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