Newrelic插件Nginx-nr-agent无法正常工作

我正在使用Newrelic的nginx-nr-agent,但突然崩溃,发出以下错误,并且没有重新开始.

2016-04-12 07:51:07,021 nginx-nr-agent [ERROR]: EXCEPTION: Traceback (most recent call last):
File "/usr/bin/nginx-nr-agent.py",line 431,in newrelic_push
u = urlopen(r,data=json.dumps(payload))
File "/usr/lib/python2.7/urllib2.py",line 127,in urlopen
return _opener.open(url,data,timeout)
File "/usr/lib/python2.7/urllib2.py",line 401,in open
response = self._open(req,data)
File "/usr/lib/python2.7/urllib2.py",line 419,in _open
'_open',req)
File "/usr/lib/python2.7/urllib2.py",line 379,in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py",line 1219,in https_open
return self.do_open(httplib.HTTPSConnection,line 1184,in do_open
r = h.getresponse(buffering=True)
File "/usr/lib/python2.7/httplib.py",line 1034,in getresponse
response.begin()
File "/usr/lib/python2.7/httplib.py",line 407,in begin
version,status,reason = self._read_status()
File "/usr/lib/python2.7/httplib.py",line 365,in _read_status
line = self.fp.readline()
File "/usr/lib/python2.7/socket.py",line 447,in readline
data = self._sock.recv(self._rbufsize)
File "/usr/lib/python2.7/ssl.py",line 241,in recv
return self.read(buflen)
File "/usr/lib/python2.7/ssl.py",line 160,in read
return self._sslobj.read(len)
File "/usr/lib/pymodules/python2.7/daemon/daemon.py",line 399,in terminate
raise exception
SystemExit: Terminating on signal 15

有什么帮助吗？