连续导入数据时的连接错误？

[王菟仔]

单机测试，写了个循环，使用mongoimport连续导入多个csv文件，开始的时候还很正常，后面经常会出现SocketException，log如下：

2017-04-09T16:39:20.643+0800 I NETWORK [thread1] connection accepted from 127.0.0.1:41626 #268 (8 connections now open)
2017-04-09T16:39:20.649+0800 D NETWORK [conn268] Socket say send() Broken pipe 127.0.0.1:41626
2017-04-09T16:39:20.649+0800 D - [conn268] User Assertion: 6:socket exception [SEND_ERROR] for 127.0.0.1:41626 src/mongo/db/service_entry_point_mongod.cpp 155
2017-04-09T16:39:20.649+0800 I - [conn268] AssertionException handling request, closing client connection: 6 socket exception [SEND_ERROR] for 127.0.0.1:41626
2017-04-09T16:39:20.650+0800 I - [conn268] end connection 127.0.0.1:41626 (8 connections now open)

每次导入结束后，打印了一下对应端口的连接数，感觉很正常，基本都是
2 ESTABLISHED
1 LISTEN
6 TIME_WAIT

出错的时候TIME_WAIT会很小，或者会出现FIN_WAIT2和CLOSE_WAIT，不知道是什么原因造成的？

[王菟仔]

求解答，这个问题卡了好久了。。。