in src/main/java/com/microsoft/azure/kusto/kafka/connect/sink/KustoSinkConfig.java [452:460]
public Properties getDlqProps() {
Map<String, Object> dlqconfigs = originalsWithPrefix(DLQ_PROPS_PREFIX);
Properties props = new Properties();
props.putAll(dlqconfigs);
props.put("bootstrap.servers", getDlqBootstrapServers());
props.put("key.serializer", "org.apache.kafka.common.serialization.ByteArraySerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.ByteArraySerializer");
return props;
}