日志信息如下:

2017-07-05 18:28:34 -18705 [idle_connection_reaper] DEBUG   - Closing expired connections 
2017-07-05 18:28:34 -18723 [idle_connection_reaper] DEBUG   - Closing connections idle longer than 60000 MILLISECONDS 
2017-07-05 18:28:39 -23724 [idle_connection_reaper] DEBUG   - Closing expired connections 
2017-07-05 18:28:39 -23724 [idle_connection_reaper] DEBUG   - Closing connections idle longer than 60000 MILLISECONDS

解决办法:

　　在ossClient使用之后应该立即关闭,ossClient.shutdown();