[Fab-user] Fabric - sesssion problem.

[Clive]

Noob Fabric user here.

Occasionally, when a 'run' operation fails, subsequent operations fail
with: 

"No handlers could be found for "paramiko.transport" 

"Fatal error: no existing session."

Example output might be: 

-- starts --

[localhost] run: mv ~/.ssh/known_hosts ~/.ssh/known_hosts_old

Warning: local() encountered an error (return code 1) while executing
'mv ~/.ssh/known_hosts ~/.ssh/known_hosts_old'

address@hidden run: echo -e 'password1
password1
' | passwd

No handlers could be found for "paramiko.transport"

Fatal error: no existing session.

-- ends --

It's as if the failing operation consumes a session slot, which is not
available for other operations.

Can anyone shed any light? Is there a way to reacquire a session after a
failed operation?

thanks.
Ropz