1. 检查SignalR连接是否保持打开状态，如果连接不是持久性的，则需要使用负载均衡器将请求映射到正确的服务器。

2. 可以在负载均衡器中设置CookieAffinity以确保客户端始终与相同的服务器通信：

services.AddSignalR(options =>
{
    options.EnableDetailedErrors = true;
    //设置漂移
    options.ClientTimeoutInterval = TimeSpan.FromSeconds(30);
    options.KeepAliveInterval = TimeSpan.FromSeconds(10);
}).AddStackExchangeRedis(Configuration.GetConnectionString("Redis"))
  .AddMessagePackProtocol()
  .AddNewtonsoftJsonProtocol(options =>
  {
      options.PayloadSerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
  });
services.AddSignalR().AddSignalRRedis(Configuration.GetConnectionString("Redis"));

app.UseCookiePolicy();
app.UseSession(new SessionOptions()
{
    IdleTimeout = TimeSpan.FromMinutes(15),
    Cookie = new CookieBuilder()
    {
        HttpOnly = true
    }
});

if (env.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
}
else
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}
//设置漂移
app.UseSignalR(route =>
{
    route.MapHub(ChatHub.HubUrl, options =>
    {
        options.ApplicationMaxConcurrency = -1;
    });
});
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseCookiePolicy();

app.UseRouting();

app.UseAuthorization();

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllerRoute(
        name: "default",
        pattern: "{controller=Home}/{action=Index}/{id?}");
    //设置漂移
    endpoints.MapHub(ChatHub.HubUrl, options =>
    {
        options.ApplicationMaxConcurrency = -1;
    });
    endpoints.MapGrpcService();
});

3. 适当设置SignalR的漂移参数：

app.UseSignalR(route =>
{
    route.MapHub(ChatHub.HubUrl, options =>
    {
        options.ApplicationMaxConcurrency = -1;
    });
});

4. 确认Redis缓存是否正确配置，SignalR使用Redis缓存可以更好地支持负载均衡。可以通过以下方式配置Redis缓存：

services.AddSignalR().AddStackExchangeRedis(Configuration.GetConnectionString("Redis"))
                    .AddMessagePackProtocol()
                    .AddNewtonsoftJsonProtocol(options =>
                    {
                        options.PayloadSerializerSettings.ContractResolver = new CamelCasePropertyNames