OverflowError: timeout is too large in gate-neutron-python27

Have quite a few tests that failed with the following reason that does not appear to be related to my change:

ft258.21: neutron.tests.unit.test_dhcp_agent.TestDhcpAgentEventHandler.test_disable_dhcp_helper_driver_failure_isolated_metadata_StringException: Empty attachments:
  pythonlogging:''
  stderr
  stdout

Traceback (most recent call last):
  File "/home/jenkins/workspace/gate-neutron-python27/neutron/tests/unit/test_dhcp_agent.py", line 428, in setUp
    self.dhcp = dhcp_agent.DhcpAgent(HOSTNAME)
  File "/home/jenkins/workspace/gate-neutron-python27/neutron/agent/dhcp_agent.py", line 84, in __init__
    self.dhcp_version = self.dhcp_driver_cls.check_version()
  File "/home/jenkins/workspace/gate-neutron-python27/neutron/agent/linux/dhcp.py", line 229, in check_version
    out = utils.execute(cmd)
  File "/home/jenkins/workspace/gate-neutron-python27/neutron/agent/linux/utils.py", line 54, in execute
    obj.communicate())
  File "/usr/lib/python2.7/subprocess.py", line 754, in communicate
    return self._communicate(input)
  File "/usr/lib/python2.7/subprocess.py", line 1314, in _communicate
    stdout, stderr = self._communicate_with_select(input)
  File "/usr/lib/python2.7/subprocess.py", line 1415, in _communicate_with_select
    rlist, wlist, xlist = select.select(read_set, write_set, [])
  File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/eventlet/green/select.py", line 79, in select
    return hub.switch()
  File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 187, in switch
    return self.greenlet.switch()
  File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 236, in run
    self.wait(sleep_time)
  File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 84, in wait
    presult = self.do_poll(seconds)
  File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/eventlet/hubs/epolls.py", line 61, in do_poll
    return self.poll.poll(seconds)
OverflowError: timeout is too large