problem
The machine is in another domain, use forward jumpserver carried out.
Only the user will connect to this server error, the user is connected to other machines, or other users to connect the machine, no problem.
View this server process, we found a large number sftp process, but this time did not carry out any user in the use of jumpserver sftp upload and download.
Solution
Manually shut down ssh connection multiplexing, the situation disappear, it should be ssh ssh connection multiplexing or quit unexpectedly, ssh connection is not released. I have been accumulated in the background
