Exception in thread "main" com.mongodb.MongoTimeoutException:
Timed out after 30000 ms while waiting for a server that matches
WritableServerSelector. Client view of cluster state is {type=
UNKNOWN, servers=[{address=hadoop02:12345, type=UNKNOWN, state=
CONNECTING, exception={com.mongodb.MongoSocketOpenException:
Exception opening socket}, caused by {java.net.SocketTimeoutException:
connect timed out}}]java连接不上Mongodb
解决方法：
修改conf文件中的mongod.conf
添加上bind_ip=0.0.0.0 允许所有访问
然后可以连接Navicat 测试是否能连接上
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