Question

我是Kafka的新手，正在研究Kafka Mqtt源连接器。我正在用2个不同的示例来实现Mqtt源连接器。

请检查以下详细信息。

参考文献1：https://johanvandevenne.github.io/kafka-connect-mqtt/

Kafka Mqtt源连接器

 http://localhost:8083/connectors \
 -H 'Content-Type: application/json' \
 -d '{ "name": "mqtt-source-connector",
   "config":
   {
     "connector.class":"be.jovacon.kafka.connect.MQTTSourceConnector",
     "mqtt.topic":"temperature",
     "kafka.topic":"mqtt.",
     "mqtt.clientID":"my_client_id",
     "mqtt.broker":"tcp://127.0.0.1:1883",
     "key.converter":"org.apache.kafka.connect.storage.StringConverter",
     "key.converter.schemas.enable":false,
     "value.converter":"org.apache.kafka.connect.storage.StringConverter",
     "value.converter.schemas.enable":false
   }
}'

Ref2：https://github.com/kaiwaehner/kafka-connect-iot-mqtt-connector-example/blob/master/live-demo-kafka-connect-iot-mqtt-connector.adoc

curl -s -X POST -H 'Content-Type: application/json' http://localhost:8083/connectors -d '{
    "name" : "mqtt-source",
"config" : {
    "connector.class" : "io.confluent.connect.mqtt.MqttSourceConnector",
    "tasks.max" : "1",
    "mqtt.server.uri" : "tcp://127.0.0.1:1883",
    "mqtt.topics" : "temperature",
    "kafka.topic" : "mqtt.",
    "confluent.topic.bootstrap.servers": "localhost:9092",
    "confluent.topic.replication.factor": "1",
    "confluent.license":""
    }
}'

当我执行上述示例并检查连接器状态时，它显示出我的运行方式：

curl http：// localhost：8083 / connectors / mqtt-source / status | python -m json.tool

％总接收百分比％Xferd平均速度时间时间时间当前 Dload上传总剩余左行驶速度100185100185 0 0 10277 0-：-：--：-：- -：-：-10277 { “连接器”：{ “ state”：“ RUNNING”， “ worker_id”：“ 127.0.1.1:8083” }， “ name”：“ mqtt-source”， “任务”： [ { “ id”：0， “ state”：“ RUNNING”， “ worker_id”：“ 127.0.1.1:8083” } ]， “ type”：“源”}

但是，当我从Mqtt主题发布数据时，在kafka消费者主题中却没有收到。

消费者：kafka-console-consumer.sh --bootstrap-server localhost：9092 --topic mqtt。 --from-beginning

Mqtt发布主题：mosquitto_pub -h 127.0.0.1 -p 1883 -t温度 -q 2 -m“ 99999,2.10＃”

当我从Mqtt发布数据时，两个Kafka Mqtt连接器都给我以下错误：

{ “连接器”：{ “ state”：“ RUNNING”， “ worker_id”：“ 127.0.1.1:8083” }， “ name”：“ mqtt-source”， “任务”： [ { “ id”：0， “ state”：“ FAILED”， “ trace”：“ java.lang.NullPointerException \ n \ tat org.apache.kafka.connect.runtime.WorkerSourceTask.convertHeaderFor（WorkerSourceTask.java:296）\ n org.apache.kafka.connect.runtime.WorkerSourceTask.sendRecords（WorkerSourceTask.java:226）\ n \ tat org.apache.kafka.connect.runtime.WorkerSourceTask.execute（WorkerSourceTask.java:194）\ n \ tat org.apache.kafka.connect.runtime.WorkerTask.doRun（WorkerTask.java:170）\ n \ tat org.apache.kafka.connect.runtime.WorkerTask.run（WorkerTask.java:214）\ n \ tat java.base / java.util.concurrent.Executors $ RunnableAdapter.call（Executors.java:515）\ n \ tat java.base / java.util.concurrent.FutureTask.run（FutureTask.java:264）\ n \ tat java.base / java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1128）\ n \ tat java.base / java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:628）\ n \ tat java.base / java.lang.Thread.run（Thread.java:834）\ n“， “ worker_id”：“ 127.0.1.1:8083” } ]， “ type”：“源”}

连接器属性是否存在问题？还是其他的东西？？

预先感谢

Kafka Mqtt源连接器无法接收从MQTT发布的数据，并失败，并显示“ java.lang.NullPointerException”

0 个答案: