attach failed with TimeoutError exception

[friendwu]

I'm running pyringe to try to attach to one python process on Mac platform, and it fails all the time.

Using pyringe git HEAD code instead of PYPI package.
Gdb version: 8.1

Here is the trace:

Traceback (most recent call last):
File "", line 1, in
File "pyringe/repl.py", line 161, in Attach
self.inferior.Reinit(pid)
File "pyringe/inferior.py", line 484, in Reinit
self.init(pid, auto_symfile_loading, architecture=self.arch)
File "pyringe/inferior.py", line 456, in init
self.StartGdb()
File "pyringe/inferior.py", line 503, in StartGdb
self._gdb.Attach(self.position)
File "pyringe/inferior.py", line 200, in
return lambda *args, **kwargs: self._Execute(name, *args, **kwargs)
File "pyringe/inferior.py", line 342, in _Execute
result_string = self._Recv(timeout)
File "pyringe/inferior.py", line 429, in _Recv
raise TimeoutError()
TimeoutError
==> pid:[71164] #threads:[0] current thread:[None]

[NetWilliam]

I have the same error while debugging some pydoop and celery code.....