相关疑难解决方法(0)

我们最近将我们的Web应用程序升级到MongoDB C#Driver 2.0并部署到生产中.低于一定负载,应用程序运行正常.一旦生产服务器上的负载超过某个限制,应用程序的CPU立即降至0,大约30秒后,将多次记录此异常:

System.TimeoutException message: A timeout occured after 30000ms selecting a server using CompositeServerSelector{ Selectors = ReadPreferenceServerSelector{ ReadPreference = { Mode = Primary, TagSets = System.Collections.Generic.List`1[MongoDB.Driver.TagSet] } }, LatencyLimitingServerSelector{ AllowedLatencyRange = 00:00:00.0150000 } }. Client view of cluster state is { ClusterId : "1", Type : "Standalone", State : "Disconnected", Servers : [{ ServerId: "{ ClusterId : 1, EndPoint : "Unspecified/10.4.0.113:27017" }", EndPoint: "Unspecified/10.4.0.113:27017", State: "Disconnected", Type: "Unknown" }] }.
stack trace:
at MongoDB.Driver.Core.Clusters.Cluster.ThrowTimeoutException(IServerSelector selector, ClusterDescription description)
at MongoDB.Driver.Core.Clusters.Cluster.<WaitForDescriptionChangedAsync>d__18.MoveNext() …

我已经在Azure中使用Mongo API创建了一个Cosmos DB数据库。我已经创建了客户端并进行了如下配置-

_mongoDbConnectionString = configuration["MongoDBConnectionString"];
_databaseName = configuration["MongoDBName"];
_client = new MongoClient(_mongoDbConnectionString);
_database = _client.GetDatabase(_databaseName);
_collectionName = configuration["MongoDBCollectionName"];

然后尝试写数据

_database.GetCollection<dynamic>(_collectionName).InsertOne(data);

它因错误而失败-

在使用CompositeServerSelector {Selectors = MongoDB.Driver.MongoClient + AreSessionsSupportedServerSelector，LatencyLimitingServerSelector {AllowedLatencyRange = 00：00：00.0150000}}选择服务器的30000毫秒后发生超时。群集状态的客户端视图为{ClusterId：“ 1”，ConnectionMode：“ ReplicaSet”，类型：“ ReplicaSet”，状态：“ Disconnected”，服务器：[{ServerId：“ {ClusterId：1，端点：”未指定/ botframeworkcosmos。 documents.azure.com:10255“}”，端点：“ Unspecified / botframeworkcosmos.documents.azure.com：10255”，状态：“ Disconnected”，类型：“ Unknown”，HeartbeatException：“ MongoDB.Driver.MongoConnectionException：异常---> System.Net.Internals，打开服务器连接时发生。

我尝试了此解决方案-使用CompositeServerSelector选择服务器30000ms后发生超时，但是它不起作用。

我还尝试过设置这样的SSL策略来配置客户端-

_mongoDbConnectionString = configuration["MongoDBConnectionString"];
_databaseName = configuration["MongoDBName"];
MongoClientSettings settings = MongoClientSettings.FromUrl(
  new MongoUrl(_mongoDbConnectionString)
);
settings.SslSettings =
  new SslSettings() { EnabledSslProtocols = SslProtocols.Tls12 };
_client = new MongoClient(settings);
_database = _client.GetDatabase(_databaseName);
_collectionName = …

.Net 控制台应用程序在 4.6.1 框架中，使用 MongoDB.Driver 2.8.0。我在 SO 中引用了许多帖子，但我仍然收到超时错误。下面是我参考的一些帖子

使用 CompositeServerSelector System.TimeoutException 选择服务器 30000 毫秒后发生超时：使用 CompositeServerSelector MongoDB C# 2.0 TimeoutException选择服务器 30000 毫秒后发生超时

下面是我用来从集合中访问文档的代码。

using MongoDB.Bson;
using MongoDB.Bson.Serialization.Attributes;
using MongoDB.Driver;

class Program
{
    static void Main(string[] args)
    {
        string connectionString =
            @"mongodb://mongoaccnt:ADASDXZWADAS2VgsqTYcTS4gtADmB1zQ==@mongocnt.documents.azure.com:10255/?ssl=true&replicaSet=globaldb";

        MongoClientSettings settings = MongoClientSettings.FromUrl(
          new MongoUrl(connectionString)
        );

        settings.SslSettings = new SslSettings() { EnabledSslProtocols = SslProtocols.Tls12 };

        var mongoClient = new MongoClient(settings);
        string dbName = "app-db";
        string collectionName = "test";
        var database = mongoClient.GetDatabase(dbName);


        var todoTaskCollection = database.GetCollection<test>(collectionName);

        var filter …