Lighttpd

My REST service consists of :

lighttpd (websever)
flup (fastcgi/wsgi gateway)
bottle (rest framework)

The intent is to externally spawn the fastcgi gateway and have lighttpd communicate with it over a TCP/IP socket.

While the external spawning seems to have worked, there is NO Response for the request.
Please note that the service works when lighty is configured with a unix socket instead.

Please help me understand what is incorrect in my configuration.

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lighty config:
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Following is the lighttpd configuration to enable fastcgi server:
fastcgi.server = (
".py" => (
"rest-fcgi-wrapper" => (
"host" => "127.0.0.1",
"port" => "30099",
"check-local" => "disable",
)
)
)
---------------------------------------------
spawn_fcgi helper script:
---------------------------------------------
$ cat spawn-rest.sh
SPAWNFCGI="/usr/bin/spawn-fcgi"
FCGIPROGRAM="/opt/local/components/rest/rest_fcgi.py"
FCGIPORT="30099"
FCGI_WEB_SERVER_ADDRS="127.0.0.1"
USERID=rest
GROUPID=rest
exec $SPAWNFCGI -a $FCGI_WEB_SERVER_ADDRS -p $FCGIPORT -f $FCGIPROGRAM -u $USERID -g $GROUPID

---------------------------------------------
Flup fcgi (rest_fcgi.py):
---------------------------------------------
import os
from flup.server.fcgi import WSGIServer
from restserver import app

if name == "__main__":
os.chdir(os.path.dirname(os.path.abspath(file)))
WSGIServer(app).run()

---------------------------------------------
Last line in lighty error log:
---------------------------------------------
2016-11-15 10:20:14: (mod_fastcgi.c.3041) got proc: pid: 0 socket: tcp:127.0.0.1:30099 load: 1

---------------------------------------------
netstat entries after the request is made:
---------------------------------------------
$ netstat -na | grep 30099
tcp 0 0 127.0.0.1:30099 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:53649 127.0.0.1:30099 ESTABLISHED
tcp 4586 0 127.0.0.1:30099 127.0.0.1:53649 ESTABLISHED