解决办法：设置SocketTimeout
spring配置如下：
<mongo:options connections-per-host="500" socket-timeout="5000" max-wait-time="5000"
threads-allowed-to-block-for-connection-multiplier="1000"
connect-timeout="30000"/>
spring-mongodb can't call something : /172.16.9.54:27017/mo;
原文：http://www.cnblogs.com/mrgong/p/4078507.html