Job to the Linux Repository Fails with "No connection could be made because the target machine actively refused it xx.xx.xx.xx:2500"

Challenge

You are running several jobs to the linux repository simultaneously and they fail with error "No connection could be made because the target machine actively refused it xx.xx.xx.xx:2500".

Cause

You have reached the limit of simultaneously opened SSH sessions.

Solution

You may increase the limit of SSH connections on the linux repository by changing etc/ssh/sshd_conf settings:

ClientAliveInterval 30
TCPKeepAlive yes
ClientAliveCountMax 99999
MaxSessions 200
MaxStartups 100:30:200