PatrickRen commented on a change in pull request #18965:
URL: https://github.com/apache/flink/pull/18965#discussion_r818310017



##########
File path: 
flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaTestEnvironmentImpl.java
##########
@@ -496,17 +494,4 @@ private void unpause(int brokerId) throws Exception {
         pausedBroker.remove(brokerId);
         LOG.info("Broker {} is resumed", brokerId);
     }
-
-    private KafkaConsumer<Void, Void> createTempConsumer() {
-        Properties consumerProps = new Properties();
-        consumerProps.putAll(getStandardProperties());
-        consumerProps.setProperty(
-                ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
-                VoidDeserializer.class.getCanonicalName());
-        consumerProps.setProperty(
-                ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,
-                VoidDeserializer.class.getCanonicalName());
-        
consumerProps.setProperty(ConsumerConfig.ALLOW_AUTO_CREATE_TOPICS_CONFIG, 
"false");
-        return new KafkaConsumer<>(consumerProps);
-    }

Review comment:
       Thanks for the reminder! This class has too much warnings (technical 
debt) so I didn't notice this one 😞 Maybe we need a giant refactor on Kafka 
test utils in the future. They are deeply bound with the legacy 
FlinkKafkaProducer and FlinkKafkaConsumer now so a lots of horrible warnings in 
IDE.




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