com.mongodb.MongoTimeout异常：等待连接时在30000 ms后超时。群集状态的客户端视图为{type=UNKNOWN，服务器=[]

Question

我们试图连接到蒙戈阿特拉斯从Java代码使用

URI“mongodb srv:：@serveraddress/dbname？retryWrites=true

奇怪的是，这里的异常跟踪服务器=[]列表为空。

这个错误的可能原因是什么？

MongoDB服务器和Java驱动程序详细信息：

MongoDB服务器：4.2

MongoDB java驱动程序：3.12.5

spring数据mongodb:2.1.5。释放

如果需要进一步的信息，请告诉我。

谢谢你的帮助。

com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[]
    at com.mongodb.internal.connection.BaseCluster.getDescription(BaseCluster.java:182)
    at com.mongodb.internal.connection.AbstractMultiServerCluster.getDescription(AbstractMultiServerCluster.java:54)
    at com.mongodb.client.internal.MongoClientDelegate.getConnectedClusterDescription(MongoClientDelegate.java:152)
    at com.mongodb.client.internal.MongoClientDelegate.createClientSession(MongoClientDelegate.java:103)
    at com.mongodb.Mongo.createClientSession(Mongo.java:832)
    at com.mongodb.MongoClient.startSession(MongoClient.java:582)
    at com.mongodb.MongoClient.startSession(MongoClient.java:569)
    at com.shutterfly.services.project.InitMongoDBCollection.onApplicationEvent(InitMongoDBCollection.java:36)
    at com.shutterfly.services.project.InitMongoDBCollection.onApplicationEvent(InitMongoDBCollection.java:20)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
    at org.springframework.boot.context.event.EventPublishingRunListener.running(EventPublishingRunListener.java:105)
    at org.springframework.boot.SpringApplicationRunListeners.running(SpringApplicationRunListeners.java:78)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:332)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
    at com.shutterfly.services.project.Application.main(Application.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

所以我有同样的问题我修复它通过这个代码使用这个导入

        import com.mongodb.client.MongoClient;

这就是代码

        String web="mongodb://";
        MongoClient mongoClient = MongoClients.create(web+ENVIRONMENT);
        database = mongoClient.getDatabase("PUT_HERE_YOUR_DB_NAME");

也许在某个地方你需要改变网络

      String web="mongodb+srv://"

Answer 2

添加答案，以便对其他人有所帮助，他们将来可能会看到类似的问题。

我们已经解决了这个问题，问题是需要时间来找到集群的列表，并连接到默认时间，我们可以使用"MongoClientOptionsFactoryBean"来自定义参数，并可以覆盖默认配置。

@Bean
public MongoClientOptionsFactoryBean getMongoClientOptionsFactoryBean() {
        MongoClientOptionsFactoryBean mongoClientOptionsFactoryBean = new MongoClientOptionsFactoryBean();
        mongoClientOptionsFactoryBean.setConnectTimeout(timeout);
        mongoClientOptionsFactoryBean.setConnectionsPerHost(connectionsPerHost);
        mongoClientOptionsFactoryBean.setMaxWaitTime(maxWaitTime);
        mongoClientOptionsFactoryBean.setServerSelectionTimeout(ServerSelectionTimeout);
        mongoClientOptionsFactoryBean.setThreadsAllowedToBlockForConnectionMultiplier(connMultiplier);
        return mongoClientOptionsFactoryBean;
    }

Answer 3

在我的情况下，mongo根本没有运行：）

请检查：

systemctl status mongod.service

并确保在重新启动服务器之前已启用：

systemctl enable mongod.service