define command{
command_name poker_rest_social
command_line /usr/lib/nagios/plugins/check_http -H $HOSTADDRESS$ --url /POKER_REST\
-e "HTTP/1.1 500 Internal Server Error" -r "No JSON object could be decoded"
}

Due to nagios check:

2010-03-15 09:39:31+0100 [HTTPChannel,5681,127.0.0.1] PokerResource: (x-forwarded-f\
or:10.10.1.12) render

and:

nslookup 10.10.1.12
Server: 127.0.0.1
Address: 127.0.0.1#53

12.1.10.10.in-addr.arpa name = nagios.vm.gnt.

2010-03-01 07:20:06+0100 [HTTPChannel,7345,127.0.0.1] Unhandled Error
Traceback (most recent call last):
File "/usr/lib/python2.5/site-packages/twisted/protocols/basic.py", line 231, in dataReceived
why = self.lineReceived(line)
File "/usr/lib/python2.5/site-packages/twisted/web/http.py", line 1067, in lineReceived
self.allContentReceived()
File "/usr/lib/python2.5/site-packages/twisted/web/http.py", line 1108, in allContentReceived
req.requestReceived(command, path, version)
File "/usr/lib/python2.5/site-packages/twisted/web/http.py", line 626, in requestReceived
self.process()
--- <exception caught here> ---
File "/usr/lib/python2.5/site-packages/twisted/web/server.py", line 150, in process
self.render(resrc)
File "/usr/lib/python2.5/site-packages/twisted/web/server.py", line 157, in render
body = resrc.render(self)
File "/usr/lib/python2.5/site-packages/pokernetwork/pokersite.py", line 208, in render
args = simplejson.loads(data, encoding = 'UTF-8')
File "/var/lib/python-support/python2.5/simplejson/__init__.py", line 324, in loads
return cls(encoding=encoding, **kw).decode(s)
File "/var/lib/python-support/python2.5/simplejson/decoder.py", line 321, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/var/lib/python-support/python2.5/simplejson/decoder.py", line 340, in raw_decode
raise ValueError("No JSON object could be decoded")
exceptions.ValueError: No JSON object could be decoded