# TCP data sending from pyton to logstash fails
**URL:** https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358
**Category:** Logstash
**Created:** [May 3, 2018, 4:27am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358 "2018-05-03T04:27:02Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@RRSR](https://discuss.elastic.co/u/RRSR)
#### Post date: [May 3, 2018, 4:27am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358/1 "2018-05-03T04:27:02Z")
Hi,
I am trying to send data from python script over TCP and receive the same in the logstash.
But there is no exchange of data happening.
logstash.conf
```
input {
tcp {
port => 5959
codec => json
}
}
filter{
}
output {
stdout {codec => rubydebug}
}
```
python :
```
import socket
import json
import sys
HOST = "127.0.0.1"
PORT = 5959
print "#STARTED#"
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print "socket created. sock: " + str(sock)
except socket.error, msg:
print "error"
sys.stderr.write("[ERROR] %s\n" % msg[1])
sys.exit(1)
try:
sock.connect((HOST, PORT))
print "socket connected to HOST: "+HOST+" PORT: "+str(PORT)
print "socket connected. sock: " + str(sock)
except socket.error, msg:
print "error"
sys.stderr.write("[ERROR] %s\n" % msg[1])
sys.exit(2)
msg = {'@message': 'python test message', '@tags': ['python', 'test']}
print "sending message: " + str(msg)
sock.sendall(json.dumps(msg))
print "end"
sock.close()
sys.exit(0)
```
After executing both the srcipts I am neither getting any error nor data in the logstash so can someone help like what can be causing the issue.
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [May 3, 2018, 4:43am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358/2 "2018-05-03T04:43:32Z")
I believe you need to send a new line after the JSON dump. Can you try adding one to see if that makes a difference?
---
### Author:  [@RRSR](https://discuss.elastic.co/u/RRSR)
#### Post date: [May 3, 2018, 4:48am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358/3 "2018-05-03T04:48:57Z")
Yeah, that worked. I just added `sock.send('\n')` after `sock.sendall(json.dumps(msg))`.
Can you explain why this new line is needed?
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [May 3, 2018, 5:07am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358/4 "2018-05-03T05:07:10Z")
Given that the `json_lines` codec exists, it is reasonable to expect the `json` codec should be able to handle this scenario. It seems like there is an [open issue](https://github.com/logstash-plugins/logstash-codec-json/issues/15) around this.
---
### Author:  [@RRSR](https://discuss.elastic.co/u/RRSR)
#### Post date: [May 3, 2018, 5:44am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358/5 "2018-05-03T05:44:04Z")
Thanks for the quick reply and explanation.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 31, 2018, 5:44am UTC](https://discuss.elastic.co/t/tcp-data-sending-from-pyton-to-logstash-fails/130358/6 "2018-05-31T05:44:04Z")
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