2024 Org.apache.kafka.common.kafkaexception failed to construct kafka consumer

Feb 22, 2023 · 构建kafka消费者失败 [英] org.apache.kafka.common.KafkaException: Failed to construct kafka consumer. 本文是小编为大家收集整理的关于 org.apache.kafka.common.KafkaException。. 构建kafka消费者失败的处理/解决方法，可以参考本文帮助大家快速定位并解决问题，中文翻译不准确的可切换到 ... . Atandt phone outage today 2022

Oct 12, 2022 · Running into issues when trying to use kerberos auth with connecting to Kafka. Using scala and my jaas.config looks something like this. KafkaClient { com.sun.security.auth.module. Apr 12, 2018 · In my case, I am having Kafka binary kafka_2.11-1.0.0 install both on server and client side, but after creating the topic my consumer is not working when I was using --bootstrap-server instead of --zookeeper. And I changed as per warning coming. Coding example for the question SpringBoot Kafka Consumer: Failed to start bean internalKafkaListenerEndpointRegistry TimeoutException-Springboot ERROR: "Failed to construct kafka consumer. Cause: org.apache.kafka.common.KafkaException: org.apache.kafka.common.KafkaException: Failed to load SSL keystore <E:\FlatFileArea\Kafka\DI\xcerts> of type JKS." while testing the kafka connection in CDI ERROR: "Failed to construct kafka consumer. Apr 20, 2021 · 2 Answers. RecordInterceptor is a spring-kafka interface, not plain Kafka API. Consumers will only accept implementations of ConsumerInterceptor, thus likely why the casting failed. Your code is correct, otherwise. Producers only accept ProducerInterceptor, and you'd use producerPrefix in the Streams config/map. Dec 14, 2018 · I am developing Spring Boot + Apache Kafka + Apache Zookeeper example. I've installed/setup Apache Zookeeper and Apache Kafka on my local Windows machine. I've taken a reference from link: https://... Oct 13, 2020 · 1 Answer. Sorted by: 4. You are using a StringSerializer but should use a StringDeserializer, one serializes, the other de serializes. And since you set them for ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG and ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG you apparently want to de serialize. config.put (ConsumerConfig.KEY_DESERIALIZER_CLASS ... Jul 9, 2022 · Solution 1 ⭐ Caused by: java.lang.ClassNotFoundException: org.apache.kafka.common.ClusterResourceListener You are missing the kafka-clients jar from your class path. What are you using for dep... Feb 2, 2022 · os.getcwd() gets evaluated on the driver, not the executors where the file locations are actually used. You should try using --files to send the certs to the the executors. . Then, you'll want to modify the path in the config to pickup from the executor directo Feb 12, 2020 · java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext ... Oct 12, 2022 · Running into issues when trying to use kerberos auth with connecting to Kafka. Using scala and my jaas.config looks something like this. KafkaClient { com.sun.security.auth.module. Jun 11, 2019 · I am trying to develop a Consumer class in Spring Boot for the Kafka (kerberos). I made necessary changes according to kerberos settings as suggested by Gary (Invalid Keystore Format, BootStrap Bro... Sep 23, 2019 · I'm trying to set up a Spark job to consume data from Kafka. The Kafka brokers have SSL set up, but I'm not able to properly build/authenticate the consumer. spark-shell command: spark-2.3.4-bin- Apr 1, 2020 · spring集成kafka运行时报错：Failed to construct kafka producer] with root cause org.apache.kafka.common.KafkaException: class org.apache.kafka.common.serialization.StringDeserializer is not an instance of org.apache.kafka.common.serialization.Serializer 如图： May 13, 2020 · Try to construct a kafka consumer with following code import org.apache.kafka.clients.consumer.ConsumerConfig; import org.apache.kafka.clients.consumer.ConsumerRecord ... May 18, 2022 · ERROR: "org.apache.kafka.common.config.ConfigException: Invalid url in bootstrap.servers" while running Kafka streaming mappings in DES ERROR: "Failed to construct Kafka consumer. Cause: No resolvable bootstrap URLs given in bootstrap.servers" while creating Kafka data object May 18, 2022 · Contact your Kafka admin to determine the correct hostname or IP address for the Kafka bootstrap servers in your environment. Make sure you use the correct hostname or IP address when you establish the connection between Kafka and your Apache Spark structured streaming application. Aug 23, 2022 · Boot 2.3 uses spring-kafka 2.5 by default (and kafka-clients 2.5.0); since you have overridden its prescribed spring-kafka version to 2.6.5, you must override all of the kafka dependencies to match. kafka-clients 2.6.1, kafka-streams 2.6.1 (if you are using them). If you are using the embedded Kafka broker in tests, there are a bunch of other ... May 18, 2022 · ERROR: "org.apache.kafka.common.config.ConfigException: Invalid url in bootstrap.servers" while running Kafka streaming mappings in DES ERROR: "Failed to construct Kafka consumer. Cause: No resolvable bootstrap URLs given in bootstrap.servers" while creating Kafka data object I am using the Apache Drill (1.14) JDBC driver in my application which consumes the data from the Kafka. The application works just fine for some time and after few iterations it fails to execute due to the following Too many files open issue. Aug 14, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. Jan 22, 2021 · To display the conditions report re-run your application with 'debug' enabled. 2021-01-22 19:36:06.216 ERROR 61013 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.kafka.config.internalKafkaListenerEndpointRegistry'; nested ... Aug 14, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. Sep 4, 2019 · Find detailed step below:-. These are configurations that you have to make sure while running a command. Check for a correct IP address and port combination passed in command bin/kafka-consumer-groups.sh --bootstrap-server 192.168.X.X:4848 --list. Main important point , configure listeners with IP address in server.properties correctly . Oct 9, 2019 · Part of AWS Collective. 1. I have a Spark job that consumes data from a secured Kafka topic. This works when the truststore.jks is physically present where the job is running. However, if I point to my S3 bucket for Spark to grab the JKS file, this fails. This is what my job looks like: Feb 12, 2020 · java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext ... Feb 22, 2023 · 构建kafka消费者失败 [英] org.apache.kafka.common.KafkaException: Failed to construct kafka consumer. 本文是小编为大家收集整理的关于 org.apache.kafka.common.KafkaException。. 构建kafka消费者失败的处理/解决方法，可以参考本文帮助大家快速定位并解决问题，中文翻译不准确的可切换到 ... Aug 18, 2022 · 问题概述我们用spark streaming 消费kafka数据，偶尔会出现该问题，其本质原因是多个进程以相同的kafka group id 并行消费同一个topic导致的，碰到该问题，应首先从迅速下面2个方面排查：多个应用程序使用了相同的kafka group id 去消费同一个topic 一个应用程序，在内部不小心间接地启动了2个消费进程，这 ... Feb 23, 2018 · org.apache.kafka.common.KafkaException: Failed to construct kafka consumer The text was updated successfully, but these errors were encountered: 👍 5 luisfsantana, anushreeringne, osboo, raushendra1, and prasanna-sk reacted with thumbs up emoji Sep 4, 2019 · Find detailed step below:-. These are configurations that you have to make sure while running a command. Check for a correct IP address and port combination passed in command bin/kafka-consumer-groups.sh --bootstrap-server 192.168.X.X:4848 --list. Main important point , configure listeners with IP address in server.properties correctly . Jul 18, 2019 · I am trying to register a MySql Debezium connector in SSL enabled Kafka cluster. The curl I am using for this purpose is : curl -k -X POST -H "Accept:application/json" -H "Content-Type:application/ Feb 12, 2020 · java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext ... Jun 11, 2019 · I am trying to develop a Consumer class in Spring Boot for the Kafka (kerberos). I made necessary changes according to kerberos settings as suggested by Gary (Invalid Keystore Format, BootStrap Bro... Jul 6, 2021 · 对应改jar依赖的是原生的kafka内容，不是shaded内容. 但是在flink环境下面，已经提供了. flink -sql -connector -kafka_2.11-1.12.0.jar. 可以看到提供的内容，对应进行maven pom文件去掉flink-connector-kafka就可以了，引用flink-sql-connector就可以解决这个问题。. 原创声明：本文系作者 ... Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams May 9, 2019 · 1、如果是spark执行的包请到spark下面的jars文件夹里检索是否拥有相关的jar包可以看到我这里是有的，那就不是jar包的问题 2、确认是不是版本问题，在自己的本地测试里看一下maven的包我这边版本是一致的，所以也不是版本问题，那是什么原因造成创建消费失败的呢 3、kafka的链接可以看到kafka是用 ... Nov 8, 2022 · org.apache.kafka.common.KafkaException: 无法构造 kafka 消费者. 我手动启动 Zookeeper，然后是 Kafka 服务器，最后是 Kafka-Rest 服务器及其各自的属性文件。. 接下来，我在 tomcat 上部署我的 Spring Boot 应用程序. 在 Tomcat 日志跟踪中，我收到错误 org.springframework.context ... Sep 10, 2021 · 1. I tried a simple sample code to test access to a "kerberized" Kafka from Quarkus 2.2.2 with smallrye-reactive-messaging-kafka : package org.acme; import org.apache.kafka.clients.consumer.ConsumerRecord; import org.eclipse.microprofile.reactive.messaging.Incoming; import javax.enterprise.context.ApplicationScoped; @ApplicationScoped public ... Oct 18, 2019 · 解决办法: Flume 中依赖的第三方 jar (Kafka的jar) 发生改变了, 需要重新编译。. 项目中所依赖的 API 如果发生更改，即使在源代码中不需要进行任何更改，也应重新编译。. 如果 API 未发生更改，则无需重新编译。. 所以要解决上述异常，需要将 flume-kafka-source 中依赖 ... Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams Jul 26, 2017 · Ah OK, I apologize, I didn't realize the logs were separately controlled. When I enabled that, both consumer and producer come back with errors constantly. Dec 9, 2016 · I run with logstash5.0 kafka plugin, got below message, and not sure why is it a ArgumentError, and which argument is wrong, any ideas?? [2016-12-09T16:32:43,420][DEBUG][org.apache.kafka.clients.consumer.KafkaConsumer] Starting the Kafka consumer [2016-12-09T16:32:43,420][DEBUG][org.apache.kafka.clients.consumer.KafkaConsumer] The Kafka consumer has closed. [2016-12-09T16:32:43,420][ERROR ... Jun 30, 2020 · The correct form is kafka: [topicname]? [options] (check Camel-Kafka docs) One of the kafka: [topicname] is kafka: [brokers], remove it. Zookeeper options for old versions of camel-kafka, remove them. By the way: The line SLF4J: Defaulting to no-operation (NOP) logger implementation on top of your stacktrace says that you use SLF4J logging ... Dec 14, 2018 · I am developing Spring Boot + Apache Kafka + Apache Zookeeper example. I've installed/setup Apache Zookeeper and Apache Kafka on my local Windows machine. I've taken a reference from link: https://... May 18, 2022 · ERROR: "org.apache.kafka.common.config.ConfigException: Invalid url in bootstrap.servers" while running Kafka streaming mappings in DES ERROR: "Failed to construct Kafka consumer. Cause: No resolvable bootstrap URLs given in bootstrap.servers" while creating Kafka data object Aug 4, 2020 · Now, I have used spring.kafka.bootstrap-servers to set the server to localhost:9092 and following are my producer, consumer and topic configuration files respectively. @Configuration public class KafkaProducerConfig { @Value(value = "${spring.kafka.bootstrap-servers}") private String bootstrapAddress; Aug 14, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. Issue: During Execution, sometimes Kafka throws Error Exception message which might look similar . Lets see how can we fix that. Caused by: org.apache.kafka.common.KafkaException: **Failed to construct kafka consumer** Fix 1: Below are some of the fixes , you should check-back - Add a comment. 12. Here is my way to solve this problem: run bin/kafka-server-stop.sh to stop running kafka server. modify the properties file config/server.properties by adding a line: listeners=PLAINTEXT:// {ip.of.your.kafka.server}:9092. restart kafka server. Since without the lisener setting, kafka will use java.net.InetAddress ... Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams Dec 9, 2016 · I run with logstash5.0 kafka plugin, got below message, and not sure why is it a ArgumentError, and which argument is wrong, any ideas?? [2016-12-09T16:32:43,420][DEBUG][org.apache.kafka.clients.consumer.KafkaConsumer] Starting the Kafka consumer [2016-12-09T16:32:43,420][DEBUG][org.apache.kafka.clients.consumer.KafkaConsumer] The Kafka consumer has closed. [2016-12-09T16:32:43,420][ERROR ... Aug 18, 2017 · Failed to construct kafka consumer. There are quite a few answers on this topic but nothing was working. I am trying to execute the following streams processor. object simplestream extends App { val builder: KStreamBuilder = new KStreamBuilder val streamingConfig = { //ToDo - Move these to config val settings = new Properties settings.put ... Nov 3, 2021 · at org.apache.kafka.common.security.JaasUtils.jaasConfig(JaasUtils.java:50) at org.apache.kafka.common.security.kerberos.KerberosLogin.getServiceName(KerberosLogin.java:297) ... 27 more 报这个错的原因是：虽然使用System.setProperty设了环境变量，但是程序跑到spark集群上时，是分了driver和executor的。 Feb 12, 2020 · java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext ... Sep 23, 2019 · I'm trying to set up a Spark job to consume data from Kafka. The Kafka brokers have SSL set up, but I'm not able to properly build/authenticate the consumer. spark-shell command: spark-2.3.4-bin- Dec 13, 2020 · spring集成kafka运行时报错：Failed to construct kafka producer] with root cause org.apache.kafka.common.KafkaException: class org.apache.kafka.common.serialization.StringDeserializer is not an instance of org.apache.kafka.common.serialization.Serializer 如图： Dec 9, 2016 · I run with logstash5.0 kafka plugin, got below message, and not sure why is it a ArgumentError, and which argument is wrong, any ideas?? [2016-12-09T16:32:43,420][DEBUG][org.apache.kafka.clients.consumer.KafkaConsumer] Starting the Kafka consumer [2016-12-09T16:32:43,420][DEBUG][org.apache.kafka.clients.consumer.KafkaConsumer] The Kafka consumer has closed. [2016-12-09T16:32:43,420][ERROR ... Jul 26, 2017 · Ah OK, I apologize, I didn't realize the logs were separately controlled. When I enabled that, both consumer and producer come back with errors constantly. Oct 30, 2021 · ERROR org.apache.kafka.common.utils.KafkaThread - Uncaught exception in thread 'kafka-producer-network-thread 2 Failed to construct kafka consumer with Spring Boot Feb 2, 2022 · os.getcwd() gets evaluated on the driver, not the executors where the file locations are actually used. You should try using --files to send the certs to the the executors. . Then, you'll want to modify the path in the config to pickup from the executor directo Aug 18, 2022 · 问题概述我们用spark streaming 消费kafka数据，偶尔会出现该问题，其本质原因是多个进程以相同的kafka group id 并行消费同一个topic导致的，碰到该问题，应首先从迅速下面2个方面排查：多个应用程序使用了相同的kafka group id 去消费同一个topic 一个应用程序，在内部不小心间接地启动了2个消费进程，这 ... Sep 3, 2017 · Failed to construct kafka producer. I'm using Kafka version 0.11.0.0 and trying to create an input stream by loading data from avro file.But it fails in instantiating the Producer with the exception: [main] INFO org.apache.kafka.clients.producer.KafkaProducer - Closing the Kafka producer with timeoutMillis = 0 ms. Jul 25, 2018 · 问题概述我们用spark streaming 消费kafka数据，偶尔会出现该问题，其本质原因是多个进程以相同的kafka group id 并行消费同一个topic导致的，碰到该问题，应首先从迅速下面2个方面排查：多个应用程序使用了相同的kafka group id 去消费同一个topic 一个应用程序，在内部不小心间接地启动了2个消费进程，这 ... Feb 28, 2019 · From what it looks like Kafka fails to read the kafka client configuration specified in the provided jaas_path. From logstash log: Unable to create Kafka consumer from given configuration {:kafka_error_message=>org.apache.kafka.common.KafkaException: Failed to construct kafka consumer, :cause=>java.lang.IllegalArgumentException: Could not find ... Feb 17, 2017 · org.apache.kafka.common.KafkaException: Failed to construct kafka producer at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:335) 原因是配置文件：kafka_client_jaas.conf中配置有问题，keyTab的路径不对，导致的；第二种：生产消费报错： Failed to construct kafka producer Aug 18, 2017 · Failed to construct kafka consumer. There are quite a few answers on this topic but nothing was working. I am trying to execute the following streams processor. object simplestream extends App { val builder: KStreamBuilder = new KStreamBuilder val streamingConfig = { //ToDo - Move these to config val settings = new Properties settings.put ... Dec 7, 2018 · Note: Databricks shades the Kafka client under the kafkashaded package. If you are using Databricks to run Spark, make sure to update all occurrences of org.apache.kafka.common.security.plain.PlainLoginModule to kafkashaded.org.apache.kafka.common.security.plain.PlainLoginModule in these samples! Jul 9, 2022 · Solution 1 ⭐ Caused by: java.lang.ClassNotFoundException: org.apache.kafka.common.ClusterResourceListener You are missing the kafka-clients jar from your class path. What are you using for dep... Oct 13, 2020 · 1 Answer. Sorted by: 4. You are using a StringSerializer but should use a StringDeserializer, one serializes, the other de serializes. And since you set them for ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG and ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG you apparently want to de serialize. config.put (ConsumerConfig.KEY_DESERIALIZER_CLASS ... Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams Oct 9, 2019 · Part of AWS Collective. 1. I have a Spark job that consumes data from a secured Kafka topic. This works when the truststore.jks is physically present where the job is running. However, if I point to my S3 bucket for Spark to grab the JKS file, this fails. This is what my job looks like: Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams Oct 18, 2019 · 解决办法: Flume 中依赖的第三方 jar (Kafka的jar) 发生改变了, 需要重新编译。. 项目中所依赖的 API 如果发生更改，即使在源代码中不需要进行任何更改，也应重新编译。. 如果 API 未发生更改，则无需重新编译。. 所以要解决上述异常，需要将 flume-kafka-source 中依赖 ... Aug 9, 2019 · I have gone through this issue once I started learning Kafka. What is the issue here: Wrong JsonSerializer class has been imported by the IDE. What to Do: When ever you are constructing object ProducerFactory, make sure that you are importing correct class file. Jan 22, 2021 · To display the conditions report re-run your application with 'debug' enabled. 2021-01-22 19:36:06.216 ERROR 61013 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.kafka.config.internalKafkaListenerEndpointRegistry'; nested ... Aug 18, 2022 · 问题概述我们用spark streaming 消费kafka数据，偶尔会出现该问题，其本质原因是多个进程以相同的kafka group id 并行消费同一个topic导致的，碰到该问题，应首先从迅速下面2个方面排查：多个应用程序使用了相同的kafka group id 去消费同一个topic 一个应用程序，在内部不小心间接地启动了2个消费进程，这 ... Sep 10, 2021 · 1. I tried a simple sample code to test access to a "kerberized" Kafka from Quarkus 2.2.2 with smallrye-reactive-messaging-kafka : package org.acme; import org.apache.kafka.clients.consumer.ConsumerRecord; import org.eclipse.microprofile.reactive.messaging.Incoming; import javax.enterprise.context.ApplicationScoped; @ApplicationScoped public ... Dec 1, 2018 · b:org.springframework.kafka.support.serializer.JsonDeserializer with modifiers "protected" c:If the serializationyou can also enable trust all (*) A2:看下是因为要为监听者得到的对象在进行序列化与反序列化要进行设置在上述配置类中如下两列针对该问题 Sep 4, 2019 · Find detailed step below:-. These are configurations that you have to make sure while running a command. Check for a correct IP address and port combination passed in command bin/kafka-consumer-groups.sh --bootstrap-server 192.168.X.X:4848 --list. Main important point , configure listeners with IP address in server.properties correctly .

Aug 23, 2022 · Boot 2.3 uses spring-kafka 2.5 by default (and kafka-clients 2.5.0); since you have overridden its prescribed spring-kafka version to 2.6.5, you must override all of the kafka dependencies to match. kafka-clients 2.6.1, kafka-streams 2.6.1 (if you are using them). If you are using the embedded Kafka broker in tests, there are a bunch of other ... . Hrodulf

org.apache.kafka.common.kafkaexception failed to construct kafka consumer

Nov 1, 2021 · Getting Failed to construct kafka producer when running the app in azure kubernates. I have a Springboot application which sends a message to a Topic (Lenses Kafka) The application is running fine when i run in my local environment but when i deploy my app in aks spoke 2 cluster it is giving me failed to construct kafka producer . Apr 12, 2018 · In my case, I am having Kafka binary kafka_2.11-1.0.0 install both on server and client side, but after creating the topic my consumer is not working when I was using --bootstrap-server instead of --zookeeper. And I changed as per warning coming. Nov 8, 2022 · org.apache.kafka.common.KafkaException: 无法构造 kafka 消费者. 我手动启动 Zookeeper，然后是 Kafka 服务器，最后是 Kafka-Rest 服务器及其各自的属性文件。. 接下来，我在 tomcat 上部署我的 Spring Boot 应用程序. 在 Tomcat 日志跟踪中，我收到错误 org.springframework.context ... Oct 30, 2021 · ERROR org.apache.kafka.common.utils.KafkaThread - Uncaught exception in thread 'kafka-producer-network-thread 2 Failed to construct kafka consumer with Spring Boot Dec 13, 2020 · spring集成kafka运行时报错：Failed to construct kafka producer] with root cause org.apache.kafka.common.KafkaException: class org.apache.kafka.common.serialization.StringDeserializer is not an instance of org.apache.kafka.common.serialization.Serializer 如图： May 13, 2020 · Try to construct a kafka consumer with following code import org.apache.kafka.clients.consumer.ConsumerConfig; import org.apache.kafka.clients.consumer.ConsumerRecord ... Jul 9, 2022 · Solution 1 ⭐ Caused by: java.lang.ClassNotFoundException: org.apache.kafka.common.ClusterResourceListener You are missing the kafka-clients jar from your class path. What are you using for dep... Jun 28, 2018 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams Jul 25, 2018 · 问题概述我们用spark streaming 消费kafka数据，偶尔会出现该问题，其本质原因是多个进程以相同的kafka group id 并行消费同一个topic导致的，碰到该问题，应首先从迅速下面2个方面排查：多个应用程序使用了相同的kafka group id 去消费同一个topic 一个应用程序，在内部不小心间接地启动了2个消费进程，这 ... Oct 13, 2020 · 1 Answer. Sorted by: 4. You are using a StringSerializer but should use a StringDeserializer, one serializes, the other de serializes. And since you set them for ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG and ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG you apparently want to de serialize. config.put (ConsumerConfig.KEY_DESERIALIZER_CLASS ... Sep 6, 2018 · 这里从报错来看很明显了. producer： org.apache.kafka.common.serialization.StringSerializer. consumer：org.apache.kafka.common.serialization.StringDeserializer. 一个是序列化一个是反序列化，两个并不一样。. 查看配置文件。. 确认API版本号与安装包版本号是否一致：. 如果安装的是kafka ... .

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