exception in ioloop on mac os

[paradoxxxzero]

exception in ioloop on mac os

[0xshipthecode]

I am seeing a similar thing on OS X 10.9:

[E 140301 01:43:00 ioloop:491] Exception in callback <function wrapped at 0x1029222a8>
Traceback (most recent call last):
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/ioloop.py", line 688, in start
self._handlers[fd](fd, events)
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/stack_context.py", line 331, in wrapped
raise_exc_info(exc)
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/stack_context.py", line 302, in wrapped
ret = fn(_args, *_kwargs)
File "/Applications/anaconda/lib/python2.7/site-packages/butterfly/routes.py", line 242, in shell_handler
self.write_message(read.decode('utf-8', 'replace'))
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/websocket.py", line 178, in write_message
raise WebSocketClosedError()
WebSocketClosedError

but ONLY after I exit one of the butterfly terminals for the first time via typing exit. Until the first terminal exit, it's golden.

Also, if I close the tab forcibly (and 'leave the page') then tornado seems to reuse file descriptors:

[E 140301 01:44:59 websocket:325] Uncaught exception in /ws/
Traceback (most recent call last):
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/websocket.py", line 322, in wrapper
return callback(_args, *_kwargs)
File "/Applications/anaconda/lib/python2.7/site-packages/butterfly/routes.py", line 216, in open
self.pty()
File "/Applications/anaconda/lib/python2.7/site-packages/butterfly/routes.py", line 105, in pty
self.communicate()
File "/Applications/anaconda/lib/python2.7/site-packages/butterfly/routes.py", line 180, in communicate
self.fd, self.shell_handler, ioloop.READ | ioloop.ERROR)
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/ioloop.py", line 545, in add_handler
self._impl.register(fd, events | self.ERROR)
File "/Applications/anaconda/lib/python2.7/site-packages/tornado/platform/kqueue.py", line 40, in register
raise IOError("fd %d already registered" % fd)
IOError: fd 10 already registered

Let me know if you need any more information.

[paradoxxxzero]

I see this seems to be a problem with the connection closure around there : https://github.com/paradoxxxzero/butterfly/blob/master/butterfly/routes.py#L244

Sadly, I have no Mac OS X to try to figure it out... If someone can look over it, that would be nice.

[paradoxxxzero]

Does the last version still do this?

[0xshipthecode]

Butterfly v 1.2.9 does not exhibit the error to me anymore. Thanks!
Now, when I 'exit', the the shell echos 'exit' and then writes out 'Closed' with no errors showing up in the terminal.

[rinchen]

Confirmed. I've updated and this error no longer occurs.