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我正在用kivy編寫一個python用戶界面來管理一些具有結構的遠程機器。由於我無法在Windows 10上使用光纖並行實現（請參閱here），我一直希望使用parallel-ssh實際執行並行遠程操作。這個問題似乎是由這些庫之間的交互引起的，而不是其中任何一個問題。一般SSH錯誤 - 讀取SSH協議標題時出錯
我已經試過手動加載我的私有密鑰的建議here：
from fabric.api import execute
import pssh
from pssh.utils import load_private_key
hosts = ['192.168.0.2']
private_key = load_private_key('C:/Users/democracy/.ssh/id_rsa')
pssh_client = pssh.ParallelSSHClient(hosts, user='XXX', password='YYY', pkey=private_key)
output = pssh_client.run_command('whoami', sudo=True)
pssh_client.join(output)
for host in output:
for line in output[host]['stdout']:
print("Host %s - output: %s" % (host, line))
上面的代碼導致以下回溯：
Exception: Error reading SSH protocol banner('This operation would block forever', <Hub at 0x242566ab9c8 select pending=0 ref=0>)
Traceback (most recent call last):
File "C:\environments\democracy\lib\site-packages\paramiko\transport.py", line 1884, in _check_banner
buf = self.packetizer.readline(timeout)
File "C:\environments\democracy\lib\site-packages\paramiko\packet.py", line 331, in readline
buf += self._read_timeout(timeout)
File "C:\environments\democracy\lib\site-packages\paramiko\packet.py", line 485, in _read_timeout
x = self.__socket.recv(128)
File "C:\environments\democracy\lib\site-packages\gevent\_socket3.py", line 317, in recv
self._wait(self._read_event)
File "C:\environments\democracy\lib\site-packages\gevent\_socket3.py", line 144, in _wait
self.hub.wait(watcher)
File "C:\environments\democracy\lib\site-packages\gevent\hub.py", line 630, in wait
result = waiter.get()
File "C:\environments\democracy\lib\site-packages\gevent\hub.py", line 878, in get
return self.hub.switch()
File "C:\environments\democracy\lib\site-packages\gevent\hub.py", line 609, in switch
return greenlet.switch(self)
gevent.hub.LoopExit: ('This operation would block forever', <Hub at 0x242566ab9c8 select pending=0 ref=0>)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\environments\democracy\lib\site-packages\paramiko\transport.py", line 1740, in run
self._check_banner()
File "C:\environments\democracy\lib\site-packages\paramiko\transport.py", line 1888, in _check_banner
raise SSHException('Error reading SSH protocol banner' + str(e))
paramiko.ssh_exception.SSHException: Error reading SSH protocol banner('This operation would block forever', <Hub at 0x242566ab9c8 select pending=0 ref=0>)
General SSH error - Error reading SSH protocol banner('This operation would block forever', <Hub at 0x242566ab9c8 select pending=0 ref=0>)
上面的代碼工作，如果我之前面料進口PSSH 。不幸的是，看起來如果我這樣做，我的kivy界面上的任何按鈕（在後臺線程中啓動任何操作）都將永久屏蔽。如果我在按下按鈕併發送鍵盤中斷後進入控制檯，kivy會停止攔截並開始清理，但在退出前按下按鈕執行命令。在發送該中斷的堆棧跟蹤低於：
[INFO ] [Base ] Leaving application in progress...
Traceback (most recent call last):
File "machine_control_ui.py", line 7, in <module>
DemocracyControllerApp().run()
File "C:\environments\democracy\lib\site-packages\kivy\app.py", line 828, in run
runTouchApp()
File "C:\environments\democracy\lib\site-packages\kivy\base.py", line 504, in runTouchApp
EventLoop.window.mainloop()
File "C:\environments\democracy\lib\site-packages\kivy\core\window\window_sdl2.py", line 659, in mainloop
self._mainloop()
File "C:\environments\democracy\lib\site-packages\kivy\core\window\window_sdl2.py", line 405, in _mainloop
EventLoop.idle()
File "C:\environments\democracy\lib\site-packages\kivy\base.py", line 339, in idle
Clock.tick()
File "C:\environments\democracy\lib\site-packages\kivy\clock.py", line 553, in tick
current = self.idle()
File "C:\environments\democracy\lib\site-packages\kivy\clock.py", line 533, in idle
usleep(1000000 * sleeptime)
File "C:\environments\democracy\lib\site-packages\kivy\clock.py", line 717, in usleep
_usleep(microseconds, self._sleep_obj)
File "C:\environments\democracy\lib\site-packages\kivy\clock.py", line 395, in _usleep
_kernel32.WaitForSingleObject(obj, 0xffffffff)
KeyboardInterrupt
*** BUTTON PRESS OPERATION OUTPUTS HERE ***
```
任何深入瞭解爲什麼這可能發生，我怎麼能避免它，將不勝感激。我可能會研究其他並行的ssh解決方案（儘管我想象使用paramiko的任何東西都會有相同的問題），或者手動啓動每個主機的線程以實現並行操作（可能有其自己的頭痛列表），但是，如果有可行的解決方案，我寧願只使用parallel-ssh庫。
我使用的是平行SSH 0.92.2關於Python 3和Windows 10