[BUG] Linux, LinuxBridge and runtime plugins hangs when retrieving IP address of an FDU interface about fog05 HOT 1 CLOSED

$ python3
Python 3.6.8 (default, Jan 14 2019, 11:02:34)
[GCC 8.0.1 20180414 (experimental) [trunk revision 259383]] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import psutil
>>> from subprocess import PIPE
>>> cmd  = 'sudo cat  /var/fos/linuxbridge/dhcp/net_6cc2aa30_leases'.split()
>>> p = psutil.Popen(cmd,stdout=PIPE)
>>> p.wait()
0
>>> r = ''
>>> for line in p.stdout:
...     r = r + line.decode()
...
>>> r
'1564040719 be:ef:be:ef:00:01 192.168.234.10 c9c507cba-ba02-4b89-9abe-b23c2763a294 01:be:ef:be:ef:00:01\n'
>>>

f = '/var/fos/linuxbridge/dhcp/net_6cc2aa30_leases'
>>> data = ''
>>> with open(f, 'r') as f:
...     data = f.read()
...
>>> data
'1564041966 be:ef:be:ef:00:01 192.168.234.10 cf009de5b-e6b5-43db-b400-985ad70f4407 01:be:ef:be:ef:00:01\n'