com.mongodb.async.client.ClientSessionHelpe 从群集描述 ClusterDes



我正在尝试使用异步mongoClient连接到aws DocumentDB。

我在 aws 中创建了一个 DocumentDB 集群,并通过 ssh 命令行成功连接。

我去了这里并创建了MongoClient,并成功连接并插入事件。

但是当我尝试创建com.mongodb.async.client.MongoClient时,连接失败并出现以下错误:

WritableServerSelector从群集描述中选择的服务器 ClusterDescription{type=REPLICA_SET, connectionMode=MULTIPLE, serverDescriptions=[ServerDescription{address=aws-cluster:27017, 类型=未知,状态=正在连接, exception={com.mongodb.MongoSocketReadTimeoutException: Timeout while 接收消息},由 {io.netty.handler.timeout.ReadTimeoutException}}]}. 等待 30000 毫秒,然后超时。

ClusterSettings clusterSettings = ClusterSettings.builder()
.applyConnectionString(new ConnectionString(connectionString)).build();
List<MongoCredential> credentials = new ArrayList<>();
credentials.add(
MongoCredential.createCredential(
mongoUserName,
mongoDBName,
mongoPassword));
MongoClientSettings settings = MongoClientSettings.builder()
.credentialList(credentials)
.clusterSettings(clusterSettings)
.streamFactoryFactory(new NettyStreamFactoryFactory())
.writeConcern(WriteConcern.ACKNOWLEDGED)
.build();
com.mongodb.async.client.MongoClient mongoClient = MongoClients.create(settings);

MongoDatabase testDB = mongoClient.getDatabase("myDB");
MongoCollection<Document> collection = testDB.getCollection("test");
Document doc = new Document("name", "MongoDB").append("type", "database");
//**trying insert document => here I got an error**
collection.insertOne(doc, new SingleResultCallback<Void>() {
@Override
public void onResult(final Void result, final Throwable t) {
System.out.println("Inserted!");
}
});

你有什么想法,为什么会这样?

我通过使用uri解决了它:

String uri = "mongodb://<username>:<Password>@<hostname>:27017/?ssl=true&ssl_ca_certs=cert";
MongoClientSettings settings = MongoClientSettings.builder()
.streamFactoryFactory(new NettyStreamFactoryFactory())
.applyConnectionString(new ConnectionString(uri))
.build();
com.mongodb.async.client.MongoClient mongoClient = MongoClients.create(settings);

我遇到了类似的错误,对我来说它与TLS配置有关。

我在 documentDB https://docs.aws.amazon.com/documentdb/latest/developerguide/security.encryption.ssl.html 中禁用了 TLS

就我而言,我必须在禁用TLS后重新启动集群。(用例不需要 TLS(。重新启动后,连接已成功建立。

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