当由 unittest runner 运行时，Paramiko 在身份验证期间挂起 [英] Paramiko hanging during authentication, when runned by dint of unittest runner

问题描述

美好的一天.

paramiko ssh 客户端有一个奇怪的问题.Connect paramiko 方法在 unittest2 类/函数之外被调用并且代码由 unittest runner 运行时挂起.

I have a strange problem with paramiko ssh client. Connect paramiko method hangs when it's called outside unittest2 classes/functions and code was run by unittest runner.

有一段代码，出现问题:

There is a piece of code, where problem appears:

import paramiko
import unittest2

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('172.18.67.10',
            username='root',
            password='secrete')
_, stdout, _ = ssh.exec_command('date')


class TestTest(unittest2.TestCase):
    def setUp(self):
        pass

如果我将 ssh.connect 移动到 TestTest 类或 setUpModule 函数中，连接将成功.当代码由原始 Python 解释器运行时，一切正常.

If I move ssh.connect into TestTest class or setUpModule function, connection will be successful. Also everything is OK when code is run by original Python interpreter.

当我尝试调试 paramiko 时，我在 paramiko/auth_handler.py:AuthHandler.wait_for_response 方法中的 while True 循环中发现了这个问题.

When I try to debug paramiko, I figure out this problem inside while True loop in paramiko/auth_handler.py:AuthHandler.wait_for_response method.

有什么建议吗?

推荐答案

根据 this SO answer，似乎是 paramiko 中与线程相关的错误，可以通过在导入期间不调用 connect() 来避免.

According to this SO answer, it seems to be a thread-related bug in paramiko and can be avoided by not calling connect() during import.

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