removed serializers from kafka node config, used default StringSerializer

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/kafka/TbKafkaNode.java

@@ -26,6 +26,7 @@ import org.apache.kafka.common.config.SslConfigs;
 import org.apache.kafka.common.header.Headers;
 import org.apache.kafka.common.header.internals.RecordHeader;
 import org.apache.kafka.common.header.internals.RecordHeaders;
+import org.apache.kafka.common.serialization.StringSerializer;
 import org.springframework.util.ReflectionUtils;
 import org.thingsboard.rule.engine.api.RuleNode;
 import org.thingsboard.rule.engine.api.TbContext;
@@ -83,8 +84,8 @@ public class TbKafkaNode extends TbAbstractExternalNode {
         Properties properties = new Properties();
         properties.put(ProducerConfig.CLIENT_ID_CONFIG, "producer-tb-kafka-node-" + ctx.getSelfId().getId().toString() + "-" + ctx.getServiceId());
         properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, config.getBootstrapServers());
-        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, config.getValueSerializer());
-        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, config.getKeySerializer());
+        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
+        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
         properties.put(ProducerConfig.ACKS_CONFIG, config.getAcks());
         properties.put(ProducerConfig.RETRIES_CONFIG, config.getRetries());
         properties.put(ProducerConfig.BATCH_SIZE_CONFIG, config.getBatchSize());

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/kafka/TbKafkaNodeConfiguration.java

@@ -15,6 +15,8 @@
  */
 package org.thingsboard.rule.engine.kafka;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import lombok.Data;
 import org.apache.kafka.common.serialization.StringSerializer;
 import org.thingsboard.rule.engine.api.NodeConfiguration;
@@ -23,6 +25,7 @@ import java.util.Collections;
 import java.util.Map;
 
 @Data
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class TbKafkaNodeConfiguration implements NodeConfiguration<TbKafkaNodeConfiguration> {
 
     private String topicPattern;
@@ -33,8 +36,6 @@ public class TbKafkaNodeConfiguration implements NodeConfiguration<TbKafkaNodeCo
     private int linger;
     private int bufferMemory;
     private String acks;
-    private String keySerializer;
-    private String valueSerializer;
     private Map<String, String> otherProperties;
 
     private boolean addMetadataKeyValuesAsKafkaHeaders;
@@ -50,8 +51,6 @@ public class TbKafkaNodeConfiguration implements NodeConfiguration<TbKafkaNodeCo
         configuration.setLinger(0);
         configuration.setBufferMemory(33554432);
         configuration.setAcks("-1");
-        configuration.setKeySerializer(StringSerializer.class.getName());
-        configuration.setValueSerializer(StringSerializer.class.getName());
         configuration.setOtherProperties(Collections.emptyMap());
         configuration.setAddMetadataKeyValuesAsKafkaHeaders(false);
         configuration.setKafkaHeadersCharset("UTF-8");