[JSch-users] Unable to connect to SFTP server after 20 connects/disconnects

[Gustav K. <Gustav.Karlsson@BEKK.no>]

Hi,

We are experiencing an issue when using Jsch to connect to a SFTP-server. It seems like the sessions are not properly closed or cleared, resulting in a rejection from the SFTP server after 20 connects+disconnects.

  1.  Execute commands connect, cd, ls and disconnect on SFTP-server 20 times. (We disconnect both the channel and the session)
  2.  The next connect results in an exception. (connection through command-line sftp now returns an error "ssh_exchange_identification: Connection closed by remote host")
  3.  Wait ~30 min and connects will again be accepted.

Has anyone experienced a similar issue and/or know the cause? Connecting 20+ times using the command-line SFTP-client does not result in this problem.

Regards,
Gustav Karlsson