Question

这是我的 Kafka-MQTT Sink 连接器配置

name=anonymous
confluent.topic.bootstrap.servers= localhost:9092
connector.class=io.confluent.connect.mqtt.MqttSinkConnector
confluent.topic.replication.factor=1
tasks.max=1
mqtt.server.uri=tcp://127.0.0.1:1883
topics=mqtt

当我运行 Kafka-connect 时，它失败并显示此消息

    [2021-07-22 17:35:37,565] ERROR WorkerSinkTask{id=anonymous-0} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted. Error: java.util.HashMap is not a supported type. (org.apache.kafka.connect.runtime.WorkerSinkTask:612)
java.lang.UnsupportedOperationException: java.util.HashMap is not a supported type.
    at io.confluent.connect.mqtt.SinkConverter.convert(SinkConverter.java:39)
    at io.confluent.connect.mqtt.MqttSinkTask.put(MqttSinkTask.java:95)
    at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:586)
    at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:329)
    at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:232)
    at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:201)
    at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:185)
    at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:234)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Kafka-MQTT 版本是 1.4.1 有什么地方出错了吗？

Answer 1

检查您的默认键/值转换器，您如何启动 kafka 连接？分享您的连接配置文件，您在值/键转换器上有什么值

尝试添加此配置定义

 "key.converter": "org.apache.kafka.connect.storage.StringConverter",
 "value.converter": "org.apache.kafka.connect.storage.StringConverter"

Kafka MQTT Sink 连接器因 HashMap 不是受支持的类型而失败

1 个答案: