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

【问题标题】：Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)无法建立到节点 -1 的连接。经纪人可能不可用。 (org.apache.kafka.clients.NetworkClient)
【发布时间】：2019-10-03 07:21:07
【问题描述】：

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

但是当我每次运行它时都试图产生低于 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

【问题讨论】：

标签： apache-kafka hortonworks-data-platform producer

【解决方案1】：

打开集群中每个代理的Server.xml 并进行以下更改

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

【讨论】：

【解决方案2】：

只需删除您的本地主机并写入端口

示例：

{--broker-list 172.0.0.1:9092} 将更改为 { --broker-list :9092 }

【讨论】：