【mongodb】使用API远程连接mongodb时，27017端口连接不上

忘是亡心i 2022-01-29 12:43 963阅读 0赞

开发环境：win10

mongodb所在环境：Centos7

mongodb版本：mongodb-linux-x86\_64-3.6.12

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先看一下连接mongodb的部分代码：

public class MongodbUtil {
    	private static MongoClient MONGODB_CLIENT;
    	private static String MONGODB_IP;
    	private static Integer MONGODB_PORT;
    	private static String MONGODB_DATABASE_NAME;
    	private static String MONGODB_COLLECTION_NAME;
    
    	static {
    		MONGODB_IP = ConfigurationManager.getProperty("mongodb.host");
    		MONGODB_PORT = ConfigurationManager.getInteger("mongodb.port");
    		MONGODB_DATABASE_NAME = ConfigurationManager.getProperty("mongodb.dataSource.name");
    		MONGODB_COLLECTION_NAME = ConfigurationManager.getProperty("mongodb.collection.name");
    		log.info("准备获取mongo连接,host:{},port:{},source:{}", MONGODB_IP, MONGODB_PORT, MONGODB_DATABASE_NAME);
    		MONGODB_CLIENT = new MongoClient(MONGODB_IP, MONGODB_PORT);
    	}
    
    	public static void main(String[] args) {
    		MongoDatabase database = MONGODB_CLIENT.getDatabase(MONGODB_DATABASE_NAME);
    		log.info("db名字:{}", database.getName());
    		MongoCollection<Document> year_census = database.getCollection("year_census");
    		FindIterable<Document> documents = year_census.find();
    		for (Document document : documents) {
    			System.out.println(document);
    		}
    	}
    }

**运行报错：**

19/05/22 08:23:57 INFO utils.MongodbUtil: 准备获取mongo连接,host:s201,port:27017,source:portrait
    19/05/22 08:23:57 INFO driver.cluster: Cluster created with settings {hosts=[s201:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
    19/05/22 08:23:57 INFO utils.MongodbUtil: db名字:portrait
    19/05/22 08:23:57 INFO driver.cluster: Cluster description not yet available. Waiting for 30000 ms before timing out
    19/05/22 08:23:58 INFO driver.cluster: Exception in monitor thread while connecting to server s201:27017
    com.mongodb.MongoSocketOpenException: Exception opening socket
    	at com.mongodb.connection.SocketStream.open(SocketStream.java:62)
    	at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:126)
    	at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114)
    	at java.lang.Thread.run(Thread.java:748)
    Caused by: java.net.ConnectException: Connection refused: connect
    	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    	at java.net.Socket.connect(Socket.java:589)
    	at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59)
    	at com.mongodb.connection.SocketStream.open(SocketStream.java:57)
    	... 3 more
    Exception in thread "main" com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=s201:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]
    	at com.mongodb.connection.BaseCluster.getDescription(BaseCluster.java:167)
    	at com.mongodb.Mongo.getConnectedClusterDescription(Mongo.java:881)
    	at com.mongodb.Mongo.createClientSession(Mongo.java:873)
    	at com.mongodb.Mongo$3.getClientSession(Mongo.java:862)
    	at com.mongodb.Mongo$3.execute(Mongo.java:819)
    	at com.mongodb.MongoIterableImpl.execute(MongoIterableImpl.java:130)
    	at com.mongodb.MongoIterableImpl.iterator(MongoIterableImpl.java:77)
    	at com.hrong.utils.MongodbUtil.main(MongodbUtil.java:68)

**解决办法：**

1、关闭防火墙:

**systemctl stop firewalld.service**

**systemctl disable firewalld.service**

2、因为这个版本的mongodb没有在etc下找到对应的配置文件，所以启动命令改成：

**mongod -dbpath=/usr/local/mongodb/data --bind\_ip 0.0.0.0**

**指定所有用户都可以连接**

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之前的命令为：mongod -dbpath=/usr/local/mongodb/data

启动出现警告：

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