Kafka output plugin problem

[praveenjirra]

I have created three ec2 instances
1st instance logstash and application
2nd instance ELK
3rd instance -- KAFKA
so my problem is i'm unable to send the application log files to kafka ...any one help me..
output
{
kafka
{
broker_list => "172.31.10.11:9092"
codec => "json"
topic_id => "kafkatesting"
}
}