消費者Kafka Java代碼正在運行而沒有輸出

Question

我正在嘗試運行kafka消費者程序，以便從名為“ test2”的主題獲取消息

我正在使用Kafka 0.9 API

Properties props = new Properties();
     props.put("bootstrap.servers", "localhost:9092");
     props.put("group.id", "test");
     props.put("enable.auto.commit", "true");
     props.put("auto.commit.interval.ms", "1000");
     props.put("session.timeout.ms", "30000");
     props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
     props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
     KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
     consumer.subscribe(Arrays.asList("test2"));
     while (true) {
         ConsumerRecords<String, String> records = consumer.poll(100);
         for (ConsumerRecord<String, String> record : records)
             System.out.printf("offset = %d, key = %s, value = %s", record.offset(), record.key(), record.value());
     }
    }

該代碼來自Kafka Consumer API 0.9的官方文檔

下圖進一步說明了這種情況

Eclipse控制台

解決此問題的任何建議

先感謝您

Answer 1

只需在構建路徑中添加slf4j jar並嘗試