ERROR in test plan - JMETER 5.6.3

[adszf]

I'm using the example of the code(Example-Test-Plan.jmx), but unsuccessfully :(...
Full LOG:
java.lang.IncompatibleClassChangeError: Expected static method 'org.apache.jmeter.threads.JMeterVariables org.apache.jmeter.protocol.java.sampler.JavaSamplerContext.getJMeterVariables()'
at com.sngular.kloadgen.sampler.KafkaProducerSampler.setupTest(KafkaProducerSampler.java:72) ~[kloadgen-5.6.12.jar:?]
at org.apache.jmeter.protocol.java.sampler.JavaSampler.sample(JavaSampler.java:194) ~[ApacheJMeter_java.jar:5.6.3]
at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:651) ~[ApacheJMeter_core.jar:5.6.3]
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:570) ~[ApacheJMeter_core.jar:5.6.3]
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:501) ~[ApacheJMeter_core.jar:5.6.3]
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:268) ~[ApacheJMeter_core.jar:5.6.3]
at java.base/java.lang.Thread.run(Thread.java:833) [?:?]

[cleverton-heusner]

I'm having the exact problem. Did you solve it?

[chandrusanthosh01]

I'm also facing this issue no one is responding here

[chandrusanthosh01]

Did you guys find any other ways

[adszf]

To solve my problem, I had to do something custom:
Kafka test script (producer using avro):
kafka.jmx:

<?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="5.0" jmeter="5.6.3">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="KafkaProducer">
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
    </TestPlan>
    <hashTree>
      <Arguments guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables">
        <collectionProp name="Arguments.arguments">
          <elementProp name="kafka.brokers" elementType="Argument">
            <stringProp name="Argument.name">kafka.brokers</stringProp>
            <stringProp name="Argument.value">${__P(kafka.broker,localhost:9093)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="kafka.topic" elementType="Argument">
            <stringProp name="Argument.name">kafka.topic</stringProp>
            <stringProp name="Argument.value">${__P(kafka.topic,person-topic)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="message.length" elementType="Argument">
            <stringProp name="Argument.name">message.length</stringProp>
            <stringProp name="Argument.value">${__P(message.length,1000)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="session.count" elementType="Argument">
            <stringProp name="Argument.name">session.count</stringProp>
            <stringProp name="Argument.value">${__P(session.count,1)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="loop.count" elementType="Argument">
            <stringProp name="Argument.name">loop.count</stringProp>
            <stringProp name="Argument.value">${__P(loop.count,20)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="thread.number" elementType="Argument">
            <stringProp name="Argument.name">thread.number</stringProp>
            <stringProp name="Argument.value">${__P(thread.number,20)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="rampup" elementType="Argument">
            <stringProp name="Argument.name">rampup</stringProp>
            <stringProp name="Argument.value">${__P(rampup,10)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="schema.registry.url" elementType="Argument">
            <stringProp name="Argument.name">schema.registry.url</stringProp>
            <stringProp name="Argument.value">${__P(schema.registry.url,http://localhost:8081)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="key.serializer" elementType="Argument">
            <stringProp name="Argument.name">key.serializer</stringProp>
            <stringProp name="Argument.value">${__P(key.serializer,org.apache.kafka.common.serialization.StringSerializer)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="value.serializer" elementType="Argument">
            <stringProp name="Argument.name">value.serializer</stringProp>
            <stringProp name="Argument.value">${__P(value.serializer,io.confluent.kafka.serializers.KafkaAvroSerializer)}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
          <elementProp name="filename.json" elementType="Argument">
            <stringProp name="Argument.name">filename.json</stringProp>
            <stringProp name="Argument.value">${__P(filename.json,${__P(resources.path)}/person.json)}}</stringProp>
            <stringProp name="Argument.metadata">=</stringProp>
          </elementProp>
        </collectionProp>
      </Arguments>
      <hashTree/>
      <SetupThreadGroup guiclass="SetupThreadGroupGui" testclass="SetupThreadGroup" testname="Set Up">
        <intProp name="ThreadGroup.num_threads">1</intProp>
        <intProp name="ThreadGroup.ramp_time">1</intProp>
        <boolProp name="ThreadGroup.same_user_on_next_iteration">true</boolProp>
        <stringProp name="ThreadGroup.on_sample_error">stoptest</stringProp>
        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller">
          <stringProp name="LoopController.loops">1</stringProp>
          <boolProp name="LoopController.continue_forever">false</boolProp>
        </elementProp>
      </SetupThreadGroup>
      <hashTree>
        <JSR223Sampler guiclass="TestBeanGUI" testclass="JSR223Sampler" testname="Schema Avro" enabled="true">
          <stringProp name="scriptLanguage">groovy</stringProp>
          <stringProp name="parameters"></stringProp>
          <stringProp name="filename"></stringProp>
          <stringProp name="cacheKey">true</stringProp>
          <stringProp name="script">props.put(&quot;avro-person&quot;,&quot;{\&quot;type\&quot;:\&quot;record\&quot;,\&quot;name\&quot;:\&quot;PersonAvro\&quot;,\&quot;namespace\&quot;:\&quot;br.com.tlf.api.kafka.person.avro\&quot;,\&quot;fields\&quot;:[{\&quot;name\&quot;:\&quot;id\&quot;,\&quot;type\&quot;:\&quot;string\&quot;,\&quot;default\&quot;:\&quot;null\&quot;},{\&quot;name\&quot;:\&quot;firstName\&quot;,\&quot;type\&quot;:\&quot;string\&quot;},{\&quot;name\&quot;:\&quot;lastName\&quot;,\&quot;type\&quot;:\&quot;string\&quot;},{\&quot;name\&quot;:\&quot;birthDate\&quot;,\&quot;type\&quot;:\&quot;string\&quot;},{\&quot;name\&quot;:\&quot;gender\&quot;,\&quot;type\&quot;:{\&quot;type\&quot;:\&quot;enum\&quot;,\&quot;name\&quot;:\&quot;GenderAvro\&quot;,\&quot;symbols\&quot;:[\&quot;MALE\&quot;,\&quot;FEMALE\&quot;]}}]}&quot;);
props.put(&quot;avro-gender&quot;,&quot;{\&quot;type\&quot;:\&quot;enum\&quot;,\&quot;name\&quot;:\&quot;GenderAvro\&quot;,\&quot;namespace\&quot;:\&quot;br.com.tlf.api.kafka.person.avro\&quot;,\&quot;symbols\&quot;:[\&quot;MALE\&quot;,\&quot;FEMALE\&quot;]}&quot;);</stringProp>
        </JSR223Sampler>
        <hashTree/>
      </hashTree>
      <ThreadGroup guiclass="ThreadGroupGui" testclass="ThreadGroup" testname="Producer">
        <stringProp name="ThreadGroup.num_threads">${thread.number}</stringProp>
        <stringProp name="ThreadGroup.ramp_time">${rampup}</stringProp>
        <boolProp name="ThreadGroup.same_user_on_next_iteration">false</boolProp>
        <stringProp name="ThreadGroup.on_sample_error">stoptest</stringProp>
        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller">
          <stringProp name="LoopController.loops">${loop.count}</stringProp>
          <boolProp name="LoopController.continue_forever">false</boolProp>
        </elementProp>
      </ThreadGroup>
      <hashTree>
        <JSR223Sampler guiclass="TestBeanGUI" testclass="JSR223Sampler" testname="Produce Kafka message for user">
          <stringProp name="scriptLanguage">groovy</stringProp>
          <stringProp name="parameters"></stringProp>
          <stringProp name="filename"></stringProp>
          <stringProp name="cacheKey">false</stringProp>
          <stringProp name="script">import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringSerializer;
import io.confluent.kafka.serializers.KafkaAvroSerializer;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericData;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.generic.GenericEnumSymbol;
import org.apache.kafka.common.header.Header;
import org.apache.kafka.common.header.internals.RecordHeader;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.annotation.*;
//Variables
String brokers = vars.get(&quot;kafka.brokers&quot;);
String topic = vars.get(&quot;kafka.topic&quot;);
String schemaRegistry = vars.get(&quot;schema.registry.url&quot;);
String keySerializer = vars.get(&quot;key.serializer&quot;);
String valueSerializer = vars.get(&quot;value.serializer&quot;);
String filenameJson = vars.get(&quot;filename.json&quot;);
int msgLength = Integer.valueOf(vars.get(&quot;message.length&quot;));
String user = String.valueOf(ctx.getThreadNum() + 1);
String  avroPerson = (String) props.get(&quot;avro-person&quot;);
String  avroGender = (String) props.get(&quot;avro-gender&quot;);

//Properties of Kafka
Properties kafkaProps = new Properties();
kafkaProps.put(&quot;bootstrap.servers&quot;, brokers);
kafkaProps.put(&quot;acks&quot;, &quot;1&quot;);
kafkaProps.put(&quot;linger.ms&quot;, 0);
kafkaProps.put(&quot;request.timeout.ms&quot;, 5000);
kafkaProps.put(&quot;delivery.timeout.ms&quot;, 30000);
kafkaProps.put(&quot;batch.size&quot;, msgLength);
kafkaProps.put(&quot;buffer.memory&quot;, msgLength*3);
kafkaProps.put(&quot;client.id&quot;, &quot;producer-client-&quot;+user);
kafkaProps.put(&quot;auto.register.schemas&quot;,&quot;true&quot;);
kafkaProps.put(&quot;key.serializer&quot;, keySerializer);
kafkaProps.put(&quot;value.serializer&quot;, valueSerializer);
kafkaProps.put(&quot;schema.registry.url&quot;,schemaRegistry);

//Set Up AVRO
Schema.Parser parserPerson = new Schema.Parser();
Schema.Parser parserGender = new Schema.Parser();

Schema schemaPerson = parserPerson.parse(avroPerson);
Schema schemaGender = parserGender.parse(avroGender);

GenericRecord avroRecordPerson = new GenericData.Record(schemaPerson);

//Json reading
ObjectMapper mapper = new ObjectMapper();
JsonNode root = mapper.readTree(new File(filenameJson));

root.fieldNames().forEachRemaining(e -&gt; {
String key = e;
String value = root.get(e).asText();
if (key.equals(&quot;gender&quot;)) {
GenericEnumSymbol genderSymbol = new GenericData.EnumSymbol(schemaGender, value);
avroRecordPerson.put(key,genderSymbol);
}else{
avroRecordPerson.put(key, value);
}
});

//Header of  KAfka
List&lt;Header&gt; headers = new ArrayList&lt;&gt;();
headers.add(new RecordHeader(&quot;operation&quot;,&quot;create&quot;.getBytes()));

//Send message - producer
Producer&lt;Object,Object&gt; producer = new KafkaProducer&lt;&gt;(kafkaProps);
try {
	producer.send(new ProducerRecord&lt;Object, Object&gt;(topic,null, System.currentTimeMillis(),&quot;&quot;,avroRecordPerson,headers)).get();
} finally {
	producer.flush();
  	producer.close();
}</stringProp>
        </JSR223Sampler>
        <hashTree/>
      </hashTree>
      <ResultCollector guiclass="ViewResultsFullVisualizer" testclass="ResultCollector" testname="View Results Tree">
        <boolProp name="ResultCollector.error_logging">false</boolProp>
        <objProp>
          <name>saveConfig</name>
          <value class="SampleSaveConfiguration">
            <time>true</time>
            <latency>true</latency>
            <timestamp>true</timestamp>
            <success>true</success>
            <label>true</label>
            <code>true</code>
            <message>true</message>
            <threadName>true</threadName>
            <dataType>true</dataType>
            <encoding>false</encoding>
            <assertions>true</assertions>
            <subresults>true</subresults>
            <responseData>false</responseData>
            <samplerData>false</samplerData>
            <xml>false</xml>
            <fieldNames>true</fieldNames>
            <responseHeaders>false</responseHeaders>
            <requestHeaders>false</requestHeaders>
            <responseDataOnError>false</responseDataOnError>
            <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
            <assertionsResultsToSave>0</assertionsResultsToSave>
            <bytes>true</bytes>
            <sentBytes>true</sentBytes>
            <url>true</url>
            <threadCounts>true</threadCounts>
            <idleTime>true</idleTime>
            <connectTime>true</connectTime>
          </value>
        </objProp>
        <stringProp name="filename"></stringProp>
      </ResultCollector>
      <hashTree/>
    </hashTree>
  </hashTree>
</jmeterTestPlan>

• plugins added to Jmeter in the \lib folder:
  avro-1.11.3.jar
  common-config-7.5.1.jar
  common-utils-7.5.1.jar
  jackson-annotations-2.17.0.jar
  jackson-core-2.17.0.jar
  jackson-databind-2.17.0.jar
  kafka-avro-serializer-7.5.1.jar
  kafka-clients-3.6.1.jar
  kafka-schema-registry-7.6.0.jar
  kafka-schema-registry-client-7.5.1.jar
  kafka-schema-serializer-7.5.1.jar