Logstash 5 is not outputting filebeat input and Kafka input

Below is configuration on Logstash 5 server

input {
kafka {
topics => ["logstash_logs"]
bootstrap_servers => "zk_server:2181"
codec => plain {
format => "%{message}"
}
}
}

input {
beats {
port => 5044
ssl => true
ssl_certificate => "/etc/pki/tls/certs/logstash-forwarder.crt"
ssl_key => "/etc/pki/tls/private/logstash-forwarder.key"
}
}

output{
stdout{}
}

filebeat is configured on same machine as that of Logstash server. It is configured correctly as well.

Still I cannot see data in /var/log/logstash/logstash.stdout .

logstash is started with -log.level=debug still I cannot see any thing in log /var/log/logstash/logstash.log

Please help me to debug setup