I try to use Kafka with version 0.9.0 with port 9092. If I use telnet, I successfully connect to this address, but I fail to connect to Kafka server with Java API
Here is my Java example exactly use the official supplied documentation:
Properties props = new Properties(); props.put("bootstrap.servers", "192.168.174.128:9092"); props.put("acks", "all"); props.put("retries", 0); props.put("batch.size", 16384); props.put("linger.ms", 1); props.put("buffer.memory", 33554432); props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer"); props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer"); Producer<String, String> producer = new KafkaProducer(props); for(int i = 1; i < 10; i++) ｛ producer.send(new ProducerRecord<String, String>("test", Integer.toString(i), Integer.toString(i))); ｝ producer.close(); I use vmware virtual machine to build my Kafka server and Zookeeper. My virtual machine IP address is 192.168.174.128. I successfully create and consume message with Kafka client.
And here is the exception full stack
2016-01-03 09:44:38.049 [kafka-producer-network-thread | producer-1] DEBUG [] [] Selector - Connection with localhost/127.0.0.1 disconnected java.net.ConnectException: Connection refused: no further information at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[na:1.7.0_51] at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739) ~[na:1.7.0_51] at org.apache.kafka.common.network.PlaintextTransportLayer.finishConnect(PlaintextTransportLayer.java:54) ~[kafka-clients-0.9.0.0.jar:na] at org.apache.kafka.common.network.KafkaChannel.finishConnect(KafkaChannel.java:79) ~[kafka-clients-0.9.0.0.jar:na] at org.apache.kafka.common.network.Selector.poll(Selector.java:274) ~[kafka-clients-0.9.0.0.jar:na] at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:270) [kafka-clients-0.9.0.0.jar:na] at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:216) [kafka-clients-0.9.0.0.jar:na] at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:141) [kafka-clients-0.9.0.0.jar:na] at java.lang.Thread.run(Thread.java:744) [na:1.7.0_51] 2016-01-03 09:44:38.049 [kafka-producer-network-thread | producer-1] DEBUG [] [] NetworkClient - Node 0 disconnected. 2016-01-03 09:44:38.078 [kafka-producer-network-thread | producer-1] DEBUG [] [] NetworkClient - No node found. Trying previously-seen node with ID 0 2016-01-03 09:44:38.078 [kafka-producer-network-thread | producer-1] DEBUG [] [] NetworkClient - Give up sending metadata request since no node is available 2016-01-03 09:44:38.099 [kafka-producer-network-thread | producer-1] DEBUG [] [] NetworkClient - Initiating connection to node 0 at localhost:9092. 2016-01-03 09:44:38.681 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name connections-closed:client-id-producer-1 2016-01-03 09:44:38.681 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name connections-created:client-id-producer-1 2016-01-03 09:44:38.681 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name bytes-sent-received:client-id-producer-1 2016-01-03 09:44:38.681 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name bytes-received:client-id-producer-1 2016-01-03 09:44:38.682 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name bytes-sent:client-id-producer-1 2016-01-03 09:44:38.682 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name select-time:client-id-producer-1 2016-01-03 09:44:38.682 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name io-time:client-id-producer-1 2016-01-03 09:44:38.682 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name node--1.bytes-sent 2016-01-03 09:44:38.683 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name node--1.bytes-received 2016-01-03 09:44:38.683 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name node--1.latency 2016-01-03 09:44:38.683 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name node-0.bytes-sent 2016-01-03 09:44:38.683 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name node-0.bytes-received 2016-01-03 09:44:38.683 [kafka-producer-network-thread | producer-1] DEBUG [] [] Metrics - Removed sensor with name node-0.latency 2016-01-03 09:44:38.683 [kafka-producer-network-thread | producer-1] DEBUG [] [] Sender - Shutdown of Kafka producer I/O thread has completed. 2016-01-03 09:44:38.683 [main] DEBUG [] [] KafkaProducer - The Kafka producer has closed.