DataServiceRequestException with TableStorageSessionStateProvider

Question

I am trying to use TableStorageSessionStateProvider from the Azure Training Kit. I can use this example without problems, but when I use it in my web application, I get this exception:

System.Data.Services.Client.DataServiceRequestException occurred
  Message=An error occurred while processing this request.
  Source=Microsoft.WindowsAzure.StorageClient
  StackTrace:
       at Microsoft.WindowsAzure.StorageClient.Tasks.Task`1.get_Result()
       at Microsoft.WindowsAzure.StorageClient.Tasks.Task`1.ExecuteAndWait()
       at Microsoft.Samples.ServiceHosting.AspProviders.TableStorageSessionStateProvider.<>c__DisplayClass5.<ResetItemTimeout>b__4()
  InnerException: System.Data.Services.Client.DataServiceClientException
       Message=<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
  <code>UpdateConditionNotSatisfied</code>
  <message xml:lang="en-US">The update condition specified in the request was not satisfied.
RequestId:c552d552-ba1c-4920-84fc-e716705b58b9
Time:2011-02-17T12:43:38.5650557Z</message>
</error>
       Source=System.Data.Services.Client
       StatusCode=412
       StackTrace:
            at System.Data.Services.Client.DataServiceContext.SaveResult.<HandleBatchResponse>d__1e.MoveNext()
       InnerException: 

I tried this one , but so far no luck. I also saw null link exceptions, so I think that TableStorageSessionStateProvider does not behave like InProc, so maybe I need to check how sessions are used in the application. But what could be the problem?

EDIT: Well, I found out that the example in the Azure training set also fails if you use only TableStorageSessionStateProvider with the same exception. You just need to comment on other providers:

  

<authentication mode="Forms">
  <forms loginUrl="~/Account/Login.aspx" timeout="2880" />
</authentication>

<!-- Membership Provider Configuration -->
<!--<membership defaultProvider="TableStorageMembershipProvider" userIsOnlineTimeWindow="20">
  <providers>
    <clear />
    <add name="TableStorageMembershipProvider" type="Microsoft.Samples.ServiceHosting.AspProviders.TableStorageMembershipProvider" description="Membership provider using table storage" applicationName="AzureStore" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" minRequiredPasswordLength="1" minRequiredNonalphanumericCharacters="0" requiresUniqueEmail="true" passwordFormat="Hashed" />
  </providers>
</membership>

<profile>
  <providers>
    <clear />
    <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
  </providers>
</profile>

--><!-- RoleManager Provider Configuration --><!--
<roleManager enabled="true" defaultProvider="TableStorageRoleProvider" cacheRolesInCookie="true" cookieName=".ASPXROLES" cookieTimeout="30" cookiePath="/" cookieRequireSSL="false" cookieSlidingExpiration="true" cookieProtection="All">
  <providers>
    <clear />
    <add name="TableStorageRoleProvider" type="Microsoft.Samples.ServiceHosting.AspProviders.TableStorageRoleProvider" description="Role provider using table storage" applicationName="AzureStore" />
  </providers>
</roleManager>-->

<!-- SessionState Provider Configuration -->
<sessionState mode="Custom" customProvider="TableStorageSessionStateProvider">
  <providers>
    <clear />
    <add name="TableStorageSessionStateProvider" type="Microsoft.Samples.ServiceHosting.AspProviders.TableStorageSessionStateProvider" applicationName="AzureStore" />
  </providers>
</sessionState>
    <machineKey decryption="AES" decryptionKey="F7FA540B4DFD82E5BB196B95D15FF81F5B973B5514F973D2A46B4C52224A3ABC" validation="SHA1" validationKey="5B973B5514F973D2A46B4C52224A3ABC90378EFA9DE62168764FF0DCE537184F0535D5D9AD66DEDC5B973B5514F973D2A46B4C52224A3ABC90378EFA97DC1ABF" />

Answer 1

, TableStorageSessionProvider, . . SQL Azure, . .

- , SQL, . AppFabric Caching CTP, .