报错：Caused by: java.net.SocketTimeoutException: connect timed out_timed out after 30000 ms while waiting to connect.-优快云博客

本文链接：https://blog.youkuaiyun.com/smileKutper/article/details/104448019

本文详细记录了一次解决MongoDB连接超时的问题过程。在虚拟机CentOS 7.6上遇到MongoDB连接超时异常，通过排查发现是防火墙阻止了连接。最终通过关闭防火墙并禁用其开机启动解决了问题。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

mongodb连接超时

com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=192.168.74.129:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.SocketTimeoutException: connect timed out}}]

详情片段：

com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=192.168.74.129:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.SocketTimeoutException: connect timed out}}]
	at com.mongodb.connection.BaseCluster.getDescription(BaseCluster.java:167)
	at com.mongodb.Mongo.getConnectedClusterDescription(Mongo.java:885)
	at com.mongodb.Mongo.createClientSession(Mongo.java:877)
	at com.mongodb.Mongo$3.getClientSession(Mongo.java:866)
	at com.mongodb.Mongo$3.execute(Mongo.java:823)
	at com.mongodb.MongoCollectionImpl.executeCount(MongoCollectionImpl.java:215)
	at com.mongodb.MongoCollectionImpl.count(MongoCollectionImpl.java:183)
	at com.mongodb.MongoCollectionImpl.count(MongoCollectionImpl.java:173)

原因：
我使用的是虚拟机centos7.6，经多方验证最后发现是由于防火墙的原因。

解决方案：
关闭防火墙

// 停止firewall
systemctl stop firewalld.service
// 禁止firewall开机启动
systemctl disable firewalld.service