c# - Dot Net Core Mongo Health Check ERROR: New MongoClient can't be added into dictionary

Question

我有一个用 Dot Net Core 3.1 编写的 Web API 应用程序，对 MongoDB 进行健康检查。我正在使用 AspNetCore.HealthChecks.MongoDb (2.2.2) nuget 进行 Mongo 健康检查。我们注意到我们的生产日志充满了错误，说New MongoClient can't be added into dictionary。能否请你帮忙？

这是在启动时为 MongoDB 健康检查编写的代码，

public void ConfigureContainer(ServiceRegistry services)
{
   services.AddHealthChecks()
                .AddMongoDb(config.ConnectionStrings.MongoDbContext.ThrowIfNull("MongoDbContext"),
                            config.AppSettings.MongoDbName.ThrowIfNull("MongoDbName"), null, null, null);
}


public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
     app.UseHealthChecks("/api/v1.0/health", new HealthCheckOptions()
     {
        ResponseWriter = WriteResponse
     });
}

private static Task WriteResponse(HttpContext httpContext, HealthReport result)
{
       httpContext.Response.ContentType = "application/json";
       if (result.Status != HealthStatus.Healthy)
       {
                IReadOnlyDictionary<string, HealthReportEntry> healthResult = result.Entries;
                if (healthResult != null)
                {
                    string json = new JObject(healthResult.Select(pair =>
                            new JProperty(pair.Key, new JObject(
                                new JProperty("Status", pair.Value.Status.ToString()),
                                new JProperty("Description", pair.Value.Description?.ToString(CultureInfo.InvariantCulture)),
                                new JProperty("Exception", pair.Value.Exception?.ToString()
                                ))))).ToString(Formatting.Indented);
                    Log.Error("Error: {json}", json);
                    return httpContext.Response.WriteAsync($"{result.Status.ToString()} {Environment.NewLine} {json}");
                }
       }
       return httpContext.Response.WriteAsync(result.Status.ToString());
}