ERR unknown command eval  说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。  异常详细信息: StackExchange.Redis.RedisServerException: ERR unknown command eval源错误: 执行当前 Web 请求期间生成了未经处理的异常。可以使用下面的异常堆栈跟踪信息确定有关异常原因和发生位置的信息。  堆栈跟踪: [RedisServerException: ERR unknown command eval]   StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl(Message message, ResultProcessor`1 processor, ServerEndPoint server) +3128   StackExchange.Redis.RedisBase.ExecuteSync(Message message, ResultProcessor`1 processor, ServerEndPoint server) +122   StackExchange.Redis.RedisDatabase.ScriptEvaluate(String script, RedisKey[] keys, RedisValue[] values, CommandFlags flags) +279   Microsoft.Web.Redis.<>c__DisplayClass4.<Eval>b__3() +55   Microsoft.Web.Redis.StackExchangeClientConnection.RetryForScriptNotFound(Func`1 redisOperation) +135   Microsoft.Web.Redis.StackExchangeClientConnection.RetryLogic(Func`1 redisOperation) +144   Microsoft.Web.Redis.StackExchangeClientConnection.Eval(String script, String[] keyArgs, Object[] valueArgs) +542   Microsoft.Web.Redis.RedisConnectionWrapper.Set(ISessionStateItemCollection data, Int32 sessionTimeout) +89   Microsoft.Web.Redis.RedisSessionStateProvider.SetAndReleaseItemExclusive(HttpContext context, String id, SessionStateStoreData item, Object lockId, Boolean newItem) +833   System.Web.SessionState.SessionStateModule.OnReleaseState(Object source, EventArgs eventArgs) +909   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +142   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +92