first time run of gateone give python error

[allenzhao64]

the installation looks ok. But when gateone is issue on command line:

[root@node1 GateOne]# gateone
Traceback (most recent call last):
File "/usr/bin/gateone", line 9, in
load_entry_point('gateone==1.2.0', 'console_scripts', 'gateone')()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
entry = import(self.module_name, globals(),globals(), ['name'])
File "/usr/lib/python2.7/site-packages/gateone-1.2.0-py2.7.egg/gateone/core/server.py", line 402, in
from gateone.auth.authorization import require, authenticated, policies
File "/usr/lib/python2.7/site-packages/gateone-1.2.0-py2.7.egg/gateone/auth/authorization.py", line 38, in
@memoize
File "/usr/lib/python2.7/site-packages/gateone-1.2.0-py2.7.egg/gateone/core/utils.py", line 290, in init
MEMO = AutoExpireDict(timeout=timeout, interval="30s")
File "/usr/lib/python2.7/site-packages/gateone-1.2.0-py2.7.egg/gateone/core/utils.py", line 161, in init
self.interval = kwargs.pop('interval')
File "/usr/lib/python2.7/site-packages/gateone-1.2.0-py2.7.egg/gateone/core/utils.py", line 211, in interval
self._timeout_checker, value, io_loop=self.io_loop)
TypeError: init() got an unexpected keyword argument 'io_loop'
Exception AttributeError: "'AutoExpireDict' object has no attribute '_key_watcher'" in <bound method AutoExpireDict.del of {}> ignored
[root@node1 GateOne]#

I am using python 2.7.5 (with the latest CentOS 7)

[allenzhao64]

The issue apparently is due to the latest version of tornado used.

By removing the 5.1a tornado, and do a pip install tornado==4.5.3, the gateone starts to function correctly.

[davama]

@allenzhao64 this really help!

I was cracking my head

[rushi718]

Yes it really helped thank you

[Pransu-panwar]

i am still getting the same error, even after downgrading tornado. please help!

[shaifali03]

Upon running the following commands,
graphlab.canvas.set_target('ipynb')
sales.show()

I am getting a long error at the end of which is following-
TypeError: initialize() got an unexpected keyword argument 'io_loop'

Pls share how to rectify this error. Is anybody else doing Coursera's Machine Learning Specialization Course ?