Multiple rsync commands with '-n' switch used for testing. The ssh tunnel is created but fails to close once the command has completed. Testing multiple times will leave runaway ssh tunnels between the initiating and receiving servers. Very costly on resources. rsync -n -e ssh -Ppuzq --stats --exclude-from=exclude.list --delete -r /directory/directory/directory/a*{,.vix} user@server:/remote/directory |mail -s RsyncComplete email@work.net & rsync -n -e ..... &
Sounds like an ssh bug to me.