The exception is gone, thanks!!
But, there is another problem which I am not sure is directly related to this(tell me if to open another issue). Seems like the proxy command process isn't killed properly and it leaves zombie processes, running the following for several loops:

import paramiko
import time
import logging
import os
ssh_host='localhost'
proxy_cmd='ssh -o StrictHostKeyChecking=no -W localhost:22 localhost'
logging.basicConfig(level=logging.DEBUG)
while True:
    logging.debug('running PID %s', os.getpid())
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh_proxy = paramiko.ProxyCommand(proxy_cmd)
    ssh.connect(sock=ssh_proxy, hostname=ssh_host)
    sftp = ssh.open_sftp()
    sftp.close()
    ssh.close()
    ssh_proxy.close()
    logging.debug('going to sleep')
    time.sleep(3)

Results in: (20125 is the program pid):

>ps  xao pid,ppid,pgid,sid,comm | grep 20125

20126 20125 20125 15530 ssh <defunct>
20169 20125 20125 15530 ssh <defunct>
20228 20125 20125 15530 ssh <defunct>
20271 20125 20125 15530 ssh <defunct>
20330 20125 20125 15530 ssh <defunct>
20373 20125 20125 15530 ssh <defunct>
20416 20125 20125 15530 ssh <defunct>
20459 20125 20125 15530 ssh <defunct>
20502 20125 20125 15530 ssh <defunct>
20545 20125 20125 15530 ssh <defunct>
20588 20125 20125 15530 ssh <defunct>

The logs after authentication look like this:

DEBUG:paramiko.transport:[chan 0] Max packet in: 32768 bytes
DEBUG:paramiko.transport:[chan 0] Max packet out: 32768 bytes
DEBUG:paramiko.transport:Secsh channel 0 opened.
DEBUG:paramiko.transport:[chan 0] Sesch channel 0 request ok
INFO:paramiko.transport.sftp:[chan 0] Opened sftp connection (server version 3)
INFO:paramiko.transport.sftp:[chan 0] sftp session closed.
DEBUG:paramiko.transport:[chan 0] EOF sent (0)
DEBUG:root:going to sleep
DEBUG:paramiko.transport:EOF in transport thread

I tried changing the 'close' method of ProxyCommand from: os.kill to Popen's kill, with no success(from the docs that looks like recommended method, though not related to this.)

Maybe I should use a different order of closing(i.e. sftp/ssh/proxy)?

Uh oh!

ProxyCommand objects need the socket-like-obj _closed fix too #789

Description

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions