When the sftp traffic is high, the sftp service stop working intermitterntly.

From the ssg log, there is exception as below,

2020-07-27T22:15:28.023-0400 SEVERE  1667 com.l7tech.external.assertions.ssh.server.ae: Exception caught in SFTP subsystem
java.util.concurrent.RejectedExecutionException: Task [email protected] rejected from [email protected][Running, pool size = 20, active threads = 20, queued tasks = 25, completed tasks = 118]

The FTP client has error message like "Too many concurrent connections",

Increase the value of following cluster wide property as per the requirement of the current traffic, for example, set it as 50,

ssh.responseDownloadThreadLimit

It's a hidden cwp, on cluster wide properties window, click Add button, manually input the above cwp, it will show the default value as below,