Question

Why does Primo sftp harvest occasionally fail with an error message "Failed while trying to copy files from sftp server. com.jcraft.jsch.JSchException: channel is not opened." ?

Answer

This is a known issue caused by specific sshd configuration on the sftp target machine.

1. Check the following options values of sshd daemon on the sftp server:

# /usr/sbin/sshd -T | egrep -i 'GSSAPIAuthentication|UseDNS'
gssapiauthentication yes
usedns yes
 

2. If they are set to yes as in the example above, update them accordingly in /etc/ssh/sshd_config to:

GSSAPIAuthentication no 
UseDNS no 

3. Then restart your sshd daemon using command:

# service sshd restart

and check the options again in step 1. They should appear now as:

gssapiauthentication no
usedns no
 

• Article last edited: 14-Jun-2017