Azure Redis Cache StackExchange.Redis.RedisConnectionException: A connection is not available to service this operation: EVAL

Question

Asp.net mvc 5 web application configuration file

   sessionState mode="Custom" customProvider="RedisSessionProvider">
      providers>
add name="RedisSessionProvider" type="Microsoft.Web.Redis.RedisSessionStateProvider" port="6380" host="XXX.redis.cache.windows.net" accessKey="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" ssl="true" />
 providers>
    sessionState>

When you start the application there is eror

Server Error in '/' Application.
No connection is available to service this operation: EVAL
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: StackExchange.Redis.RedisConnectionException: No connection is available to service this operation: EVAL
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[RedisConnectionException: No connection is available to service this operation: EVAL]
   StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl(Message message, ResultProcessor`1 processor, ServerEndPoint server) in c:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.cs:1922
   StackExchange.Redis.RedisBase.ExecuteSync(Message message, ResultProcessor`1 processor, ServerEndPoint server) in c:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\RedisBase.cs:80
   StackExchange.Redis.RedisDatabase.ScriptEvaluate(String script, RedisKey[] keys, RedisValue[] values, CommandFlags flags) in c:\TeamCity\buildAgent\work\3ae0647004edff78\StackExchange.Redis\StackExchange\Redis\RedisDatabase.cs:866
   Microsoft.Web.Redis.<>c__DisplayClass4.<Eval>b__3() in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:113
   Microsoft.Web.Redis.StackExchangeClientConnection.RetryForScriptNotFound(Func`1 redisOperation) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:129
   Microsoft.Web.Redis.StackExchangeClientConnection.RetryLogic(Func`1 redisOperation) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:155
   Microsoft.Web.Redis.StackExchangeClientConnection.Eval(String script, String[] keyArgs, Object[] valueArgs) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\Shared\StackExchangeClientConnection.cs:113
   Microsoft.Web.Redis.RedisConnectionWrapper.Set(ISessionStateItemCollection data, Int32 sessionTimeout) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisConnectionWrapper.cs:135
   Microsoft.Web.Redis.RedisSessionStateProvider.SetAndReleaseItemExclusive(HttpContext context, String id, SessionStateStoreData item, Object lockId, Boolean newItem) in c:\TeamCity\buildAgent\work\f55792526e6d9089\src\RedisSessionStateProvider\RedisSessionStateProvider.cs:408
   System.Web.SessionState.SessionStateModule.OnReleaseState(Object source, EventArgs eventArgs) +906
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +142
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +92
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1055.0

Answer 1

I had the same problem and found a solution that uses a different one: https://github.com/alex-simonov/RedisAspNetProviders

It works for me

Answer 2

There may be 3 reasons:

• The connection string is incorrect (looks normal)
• An instance has not yet been created (usually it takes a lot to create in azure)
• ( Windows).

redis cache ?

redis Windows

redis-cli -h XXX.redis.cache.windows.net -a XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX 

( , .)

NinjaTip # 18 - Redis

, Redis 6379 ( , SSl-, )

, .

Answer 3

, -:

<sessionState mode="Custom" customProvider="MySessionStateStore">
  <providers>
    <add name="MySessionStateStore" type="Microsoft.Web.Redis.RedisSessionStateProvider" connectionString="PUTCORRECTNAMEHERE.edis.cache.windows.net:6380,password=YOURPRIMARYKEYPUTHERE,ssl=True,abortConnect=False" />
  </providers>
</sessionState>