Configuring logstash with ssl and sending message to kafka(with ssl) topic - ssl

Question

I have logstash-6.5.4 (with ssl), web and scheduler in my local (hostname: webbox) and kafka-2.0 (with ssl) on another (hostname: kafkabox).
I am not able to receive message in kafka topic when message is sent from logstash.
Neither error message is displayed not message is sent to kafka topic. I tried to import logstash.crt into kafka's truststore but it also didn't worked.
Created logstash.crt and logstash.key with below command.
sudo openssl req -x509 -batch -nodes -days 3650 -newkey rsa:2048 -keyout /etc/logstash/logstash.key -out /etc/logstash/logstash.crt
Imported the logstash.crt into kafka's truststore file also and tried.
keytool -import -alias logstash -file logstash.crt -keystore cacerts
Logstash conf file is given below...
input {
tcp {
host=>"0.0.0.0"
port=>5514
type=>"syslogType"
ssl_enable=>true
ssl_cert=>"/etc/logstash/logstash.crt"
ssl_key=>"/etc/logstash/logstash.key"
ssl_verify=>false
}
}
filter {
}
output {
kafka {
bootstrap_servers=>"kafkabox:9093"
codec=>"json_lines"
topic_id=>"a_test"
ssl_keystore_location=>"keystore file"
ssl_keystore_password=>"changeit"
ssl_key_password=>"changeit"
ssl_truststore_location=>"truststore file"
ssl_truststore_password=>"changeit"
security_protocol=>"SSL"
}
}
Expecting message is sent from logstash (with SSL) to kafka (with SSL).
Java Code to connect to logstash which internally failing to send message to kafka topics (in ssl mode).
public class LogstashClient {
private static String message = "<86>Jun 25 14:32:25 webbox sshd[7517]: Failed password for root from 196.165.132.192 port 45691 ssh2";
public static void main(String[] args) throws Exception {
nonSSL();
//SSL();
}
private static void SSL() throws Exception {
// logstash.crt is directly imported into kafka's truststore
// Below <<Client Truststore>> will also have logstash.crt imported for handshaking while connecting
System.setProperty("javax.net.ssl.trustStore", "<<Client Truststore>>");
System.setProperty("javax.net.ssl.trustStorePassword", "test1234");
SSLSocketFactory factory = (SSLSocketFactory)SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) factory.createSocket("localhost", 5514);
System.out.println("Handshaking...");
socket.startHandshake();
PrintWriter printWriter = new PrintWriter(socket.getOutputStream(), true);
boolean checkError = printWriter.checkError();
printWriter.println(message);
}
private static void nonSSL() throws Exception {
Socket socket = new Socket("localhost", 5514);
PrintWriter printWriter = new PrintWriter(socket.getOutputStream(), true);
printWriter.println(message);
}
}
Thanks,
RK,