我通过以下命令启动了一个Mongos服务器：
nohup mongos --port 57017 --configdb configsvr1:47017,configsvr2:47017,configsvr3:47017 > s.nohup 2>&1 &
configsvr *是配置服务器。我的问题是Mongos实例总是在几个小时后退出。 Mongos日志我发现如下：
W SHARDING [LockPinger] Error encountered while stopping ping on mongos_server:
57017:1472436263:-1365656364 :: caused by :: 17382
Can't use connection pool during shutdown
I SHARDING [signalProcessingThread] dbexit: rc:0