apache-kafka - 无法建立到节点 -1 的连接。经纪人可能不可用。 (org.apache.kafka.clients.NetworkClient)

Question

我已经安装了 Kafka 并做了一些基本的测试。我可以使用 Kafka-broker/bin 文件夹下提供的脚本创建主题。

但是，当我每次运行此程序时都试图生成低于 WARNing 的消息时。并且不会生成任何消息。请指教。

[root@node2 bin]# ./kafka-console-producer.sh --broker-list localhost:9092 --topic test_master
>testmsg1
    [2019-05-15 06:25:19,092] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:19,197] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:19,349] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:19,562] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:20,017] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:20,876] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:21,987] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:22,957] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    [2019-05-15 06:25:23,818] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
    ^Corg.apache.kafka.common.KafkaException: Producer closed while send in progress
            at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:826)
            at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:803)
            at kafka.tools.ConsoleProducer$.send(ConsoleProducer.scala:75)
            at kafka.tools.ConsoleProducer$.main(ConsoleProducer.scala:57)
            at kafka.tools.ConsoleProducer.main(ConsoleProducer.scala)
    Caused by: org.apache.kafka.common.KafkaException: Requested metadata update after close
            at org.apache.kafka.clients.Metadata.awaitUpdate(Metadata.java:188)
            at org.apache.kafka.clients.producer.KafkaProducer.waitOnMetadata(KafkaProducer.java:938)
            at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:823)
            ... 4 more

Answer 1

打开 Server.xml集群的每个代理并进行以下更改

更改 listeners=PLAINTEXT://:9092至 listeners=PLAINTEXT://<our ip address>:9092