我正在尝试从mLab上托管的URI连接到我的mongodb数据库，但我不能，显示此错误：
Connection failed.
SERVER [ds121090-a0.mlab.com:19490] (Type: UNKNOWN)
__/ Connection error (MongoSocketOpenException): Exception opening socket
|____/ I/O error: connect timed out
Details:
Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=ds132132190-a0.mlab.com:19490, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.SocketTimeoutException: connect timed out}}]
mongodb://user:xxxxx@ds132132190.mlab.com:19490/mydb
我的localhost数据库工作正常。
我的服务器数据库出了什么问题？