you need to use org.apache.kafka.common.serialization.StringSerializer as your ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG
On Wed, 5 Jul 2017 at 19:18 罗 辉 <luo...@zetyun.com> wrote: > hi guys: > > I got an exception which i searched searchhadoop.com and the archive as > well and got no matches, here it is: > > log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for > more info. > Exception in thread "main" org.apache.kafka.common.KafkaException: Failed > to construct kafka producer > at > org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:342) > at > org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:191) > at com.zetyum.www.P$.main(P.scala:28) > at com.zetyum.www.P.main(P.scala) > Caused by: org.apache.kafka.common.KafkaException: > org.apache.kafka.common.serialization.StringDeserializer is not an instance > of org.apache.kafka.common.serialization.Serializer > at > org.apache.kafka.common.config.AbstractConfig.getConfiguredInstance(AbstractConfig.java:205) > at > org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:239) > ... 3 more > > > add I tried 0.11 and 0.10 for scala 2.10, both got upper exception. Here > is my code: > > import org.apache.kafka._ > import org.apache.kafka.clients._ > import org.apache.kafka.clients.producer._ > import org.apache.kafka.clients.consumer._ > import org.apache.kafka.common.serialization._ > import java.util.Properties > > object P { > def main(args: Array[String]) { > val brokers = "localhost:9092" > val topic = "test" > // Zookeeper connection properties > val props = new Properties() > props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, brokers) > props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, > "org.apache.kafka.common.serialization.StringDeserializer") > props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, > "org.apache.kafka.common.serialization.StringSerializer") > val producer = new KafkaProducer[String, String](props) > while (true) { > val message = new ProducerRecord[String, String](topic, "1", "1") > println(message) > producer.send(message) > } > Thread.sleep(1000) > } > } > > thanks for any advices > > > San > >
