Thank you for your reply, perhaps my description of the problem is not too clear.
I'm using hfs 2.3 version, as long as there is a file upload operation, during this time, hfs will lose response, click on the button hfs no response, the client can not log in through, when the upload is finished, hfs recovery response, the client is also normal landing.
This problem only upload, download no problem.
I hope to get your help again,thank you.