AttributeError: 'SSLSysLogHandler' object has no attribute 'socket'

[bozzmob]

Here is my test.py code-

import logging
import socket
from   syslogssl import SSLSysLogHandler

host = '10.140.7.251'
port = 6514 # default, you'll want to change this to your port
address = (host, port)

# We don't want this to hang
socket.setdefaulttimeout(5.0)

logger = logging.getLogger()
logger.setLevel(logging.INFO)
syslog =  SSLSysLogHandler(address=address, certs='/etc/ssl/rsyslog/THRALL-certificate.crt')
logger.addHandler(syslog)

logger.info('testing SSLSysLogHandler')

I am not sure about the unknown error and also, AttributeError: 'SSLSysLogHandler' object has no attribute 'socket'. Error stacktrace-

root (master *):[/home/admin/scripts/python-syslogssl]
 $ python test.py
Traceback (most recent call last):
  File "test.py", line 14, in <module>
    syslog =  SSLSysLogHandler(address=address, certs='/etc/ssl/rsyslog/THRALL-certificate.crt')
  File "/home/admin/scripts/python-syslogssl/syslogssl.py", line 115, in __init__
    cert_reqs=ssl.CERT_REQUIRED)
  File "/usr/lib/python2.7/ssl.py", line 933, in wrap_socket
    ciphers=ciphers)
  File "/usr/lib/python2.7/ssl.py", line 542, in __init__
    self._context.load_verify_locations(ca_certs)
ssl.SSLError: unknown error (_ssl.c:2831)
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.7/logging/__init__.py", line 1669, in shutdown
    h.close()
  File "/home/admin/scripts/python-syslogssl/syslogssl.py", line 122, in close
    self.socket.close()
AttributeError: 'SSLSysLogHandler' object has no attribute 'socket'
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.7/logging/__init__.py", line 1669, in shutdown
    h.close()
  File "/home/admin/scripts/python-syslogssl/syslogssl.py", line 122, in close
    self.socket.close()
AttributeError: 'SSLSysLogHandler' object has no attribute 'socket'

I created .crt from my .pem file this way-

openssl x509 -outform der -in THRALL-cert.pem -out THRALL-certificate.crt

Ref: StackOverflow