Excessive exception on TCP-probe

[clmbrdude]

We are running a paramiko sftp server in kubernetes.
To monitor that the server is up we have configured a TCP probe on port 22 to run every 10 seconds. Also we are running a load balancing nginx instance in front of the sftp servers, that will use a TCP probe the find out if the servers are alive.

Problem is that the logfiles are filled with exceptions looking like this:

paramiko.transport ERROR <host:4b4ade56cc9e> Exception: Error reading SSH protocol banner
paramiko.transport ERROR <host:4b4ade56cc9e> Traceback (most recent call last):
paramiko.transport ERROR <host:4b4ade56cc9e>   File "/usr/local/lib/python3.7/site-packages/paramiko/transport.py", line 2138, in _check_banner
paramiko.transport ERROR <host:4b4ade56cc9e>     buf = self.packetizer.readline(timeout)
paramiko.transport ERROR <host:4b4ade56cc9e>   File "/usr/local/lib/python3.7/site-packages/paramiko/packet.py", line 367, in readline
paramiko.transport ERROR <host:4b4ade56cc9e>     buf += self._read_timeout(timeout)
paramiko.transport ERROR <host:4b4ade56cc9e>   File "/usr/local/lib/python3.7/site-packages/paramiko/packet.py", line 563, in _read_timeout
paramiko.transport ERROR <host:4b4ade56cc9e>     raise EOFError()
paramiko.transport ERROR <host:4b4ade56cc9e> EOFError
paramiko.transport ERROR <host:4b4ade56cc9e> 
paramiko.transport ERROR <host:4b4ade56cc9e> During handling of the above exception, another exception occurred:
paramiko.transport ERROR <host:4b4ade56cc9e> 
paramiko.transport ERROR <host:4b4ade56cc9e> Traceback (most recent call last):
paramiko.transport ERROR <host:4b4ade56cc9e>   File "/usr/local/lib/python3.7/site-packages/paramiko/transport.py", line 1966, in run
paramiko.transport ERROR <host:4b4ade56cc9e>     self._check_banner()
paramiko.transport ERROR <host:4b4ade56cc9e>   File "/usr/local/lib/python3.7/site-packages/paramiko/transport.py", line 2143, in _check_banner
paramiko.transport ERROR <host:4b4ade56cc9e>     "Error reading SSH protocol banner" + str(e)
paramiko.transport ERROR <host:4b4ade56cc9e> paramiko.ssh_exception.SSHException: Error reading SSH protocol banner
paramiko.transport ERROR <host:4b4ade56cc9e> 

It seems that the method _check_banner() will cause these exceptions to be raised if conecctions is dropped before a banner is sent.
The "easy" fix would be to catch and reraise the EOFError, i.e.

            except EOFError:
                raise