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Not able to execute Kafka Producer Code in Vugen

I am trying to send a message to Kafka cluster through a java program in Vugen 12.50 using Java Vuser(over HTTP) protocol. The code looks like:

import lrapi.lr;
import java.util.*;
import org.apache.kafka.clients.producer.*;
import org.apache.kafka.clients.producer.internals.*;
import org.apache.kafka.clients.*;

public class Actions
    public int init() throws Throwable {
        return 0;

  public int action() throws Throwable {
      String topicName = "TopicName";
      String value = "PTTest1";

      Properties props = new Properties();      props.put("bootstrap.servers", "AAA-abcde-001:9092");      props.put("key.serializer","org.apache.kafka.common.serialization.StringSerializer");         
      props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

     Producer<String, String> producer = new KafkaProducer <String,String>(props);

      ProducerRecord<String, String> record = new ProducerRecord<String,String>(topicName,value);      producer.send(record);           
      return 0;
    }//end of action
  public int end() throws Throwable {
        return 0;


Though it does not give any compilation errors in Vugen, it fails during run time with below error:

Error: at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at DummyClassLoader.loadClass(DummyClassLoader.java:15) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at ScriptFactory.getScriptObject(ScriptFactory.java:50) Error: Can't create script object. Error: Exception was raised when calling abort-cleanup function in extension java_int.dll: System Exceptions: EXCEPTION_ACCESS_VIOLATION 

I have used kafka-clients- jar as well), java-util-1.3.1.jar and jre6\lib\rt.jar in runtime classpath and have JDK 1.6 for Vugen compatibility.

I have tried setting up environment and system variables but the error still persists. Can you please point me in the right direction to resolve this error.

Shlomi Nissim

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