[syslog-ng] Python external program destination and line buffer

Hi, i wrote a program destination (in python) that parse a message and insert data in redis. My code is: import re import fileinput import redis r = redis.Redis(host="127.0.0.1", port=6379, db=0) for line in fileinput.input(): tid = re.search('X-TransactionId: (.+?) ', line) #print tid.group(1) regexp_result = re.findall(" Recipient: ([A-z0-9._%+-]+@[A-z0-9.-]+)", line) for email in regexp_result: r.sadd(tid.group(1)+"_recs", email) I configure my destination in this way: destination python_to_file { program("/usr/bin/python /etc/syslog-ng/python/Ric_acc_dest.py" flush-lines(1)); }; It works only if i send many message. If i send only one message it doesn't insert nothing in redis. Any ideas? --