我创建了一个演示项目，以检查带弹簧启动的kafka的功能。 我成功创建了这个演示。但是当我运行此项目时，生产者会收到味精，但消费者会在控制台中警告我。 我不明白为什么这会给我警告，请有人帮助我解决此问题。 此警告也会显示为无限时间。
这是我的 application.yml 代码
spring:
kafka:
consumer:
bootstrap-servers: localhost:9092
group-id: group_id
auto-offset-reset: earliest
key-deserializer:
org.apache.kafka.common.serialization.StringDeserializer
value-deserializer:
org.apache.kafka.common.serialization.StringDeserializer
producer:
bootstrap-servers: localhost:9092
key-serializer:
org.apache.kafka.common.serialization.StringSerializer
value-serializer:
org.apache.kafka.common.serialization.StringSerializer
这是我的 Producer.java
package com.kafkaexample.engine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
@Service
public class Producer {
private static final Logger logger = LoggerFactory.getLogger(Producer.class);
private static final String TOPIC = "users";
@Autowired
private KafkaTemplate<String, String> kafkaTemplate;
public void sendMessage(String message) {
logger.info(String.format("#### -> Producing message -> %s", message));
this.kafkaTemplate.send(TOPIC, message);
}
}
这是我的 Consumer.java
package com.kafkaexample.engine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Service;
import java.io.IOException;
@Service
public class Consumer {
private final Logger logger = LoggerFactory.getLogger(Consumer.class);
@KafkaListener(topics = "users", groupId = "group_id")
public void consume(String message) throws IOException {
logger.info(String.format("#### -> Consumed message -> %s", message));
}
}
这是我的控制器
package com.kafkaexample.controller;
import com.kafkaexample.engine.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping(value = "/kafka")
public class KafkaController {
private final Producer producer;
@Autowired
KafkaController(Producer producer) {
this.producer = producer;
}
@PostMapping(value = "/publish")
public void sendMessageToKafkaTopic(@RequestParam("message") String message) {
this.producer.sendMessage(message);
}
}
这是我运行应用程序时的项目控制台
"C:\Program Files\Java\jdk1.8.0_144\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.1.5\lib\idea_rt.jar=51889:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.1.5\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_144\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\rt.jar;D:\tecor\Lugbee_data\Lugbee\lugbee_notification\kafkaWithSpringBoot\target\classes;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.1.4.RELEASE\spring-boot-starter-web-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-starter\2.1.4.RELEASE\spring-boot-starter-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot\2.1.4.RELEASE\spring-boot-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.1.4.RELEASE\spring-boot-autoconfigure-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.1.4.RELEASE\spring-boot-starter-logging-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\Shree\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\Shree\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.11.2\log4j-to-slf4j-2.11.2.jar;C:\Users\Shree\.m2\repository\org\apache\logging\log4j\log4j-api\2.11.2\log4j-api-2.11.2.jar;C:\Users\Shree\.m2\repository\org\slf4j\jul-to-slf4j\1.7.26\jul-to-slf4j-1.7.26.jar;C:\Users\Shree\.m2\repository\javax\annotation\javax.annotation-api\1.3.2\javax.annotation-api-1.3.2.jar;C:\Users\Shree\.m2\repository\org\yaml\snakeyaml\1.23\snakeyaml-1.23.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.1.4.RELEASE\spring-boot-starter-json-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.9.8\jackson-databind-2.9.8.jar;C:\Users\Shree\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.9.0\jackson-annotations-2.9.0.jar;C:\Users\Shree\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.9.8\jackson-core-2.9.8.jar;C:\Users\Shree\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.9.8\jackson-datatype-jdk8-2.9.8.jar;C:\Users\Shree\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.9.8\jackson-datatype-jsr310-2.9.8.jar;C:\Users\Shree\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.9.8\jackson-module-parameter-names-2.9.8.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\2.1.4.RELEASE\spring-boot-starter-tomcat-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.17\tomcat-embed-core-9.0.17.jar;C:\Users\Shree\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.17\tomcat-embed-el-9.0.17.jar;C:\Users\Shree\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.17\tomcat-embed-websocket-9.0.17.jar;C:\Users\Shree\.m2\repository\org\hibernate\validator\hibernate-validator\6.0.16.Final\hibernate-validator-6.0.16.Final.jar;C:\Users\Shree\.m2\repository\javax\validation\validation-api\2.0.1.Final\validation-api-2.0.1.Final.jar;C:\Users\Shree\.m2\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;C:\Users\Shree\.m2\repository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-web\5.1.6.RELEASE\spring-web-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-beans\5.1.6.RELEASE\spring-beans-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-webmvc\5.1.6.RELEASE\spring-webmvc-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-aop\5.1.6.RELEASE\spring-aop-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-expression\5.1.6.RELEASE\spring-expression-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\kafka\spring-kafka\2.2.5.RELEASE\spring-kafka-2.2.5.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-context\5.1.6.RELEASE\spring-context-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-messaging\5.1.6.RELEASE\spring-messaging-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-tx\5.1.6.RELEASE\spring-tx-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\retry\spring-retry\1.2.4.RELEASE\spring-retry-1.2.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\apache\kafka\kafka-clients\2.0.1\kafka-clients-2.0.1.jar;C:\Users\Shree\.m2\repository\org\lz4\lz4-java\1.4.1\lz4-java-1.4.1.jar;C:\Users\Shree\.m2\repository\org\xerial\snappy\snappy-java\1.1.7.1\snappy-java-1.1.7.1.jar;C:\Users\Shree\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-starter-test\2.1.4.RELEASE\spring-boot-starter-test-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-test\2.1.4.RELEASE\spring-boot-test-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\boot\spring-boot-test-autoconfigure\2.1.4.RELEASE\spring-boot-test-autoconfigure-2.1.4.RELEASE.jar;C:\Users\Shree\.m2\repository\com\jayway\jsonpath\json-path\2.4.0\json-path-2.4.0.jar;C:\Users\Shree\.m2\repository\net\minidev\json-smart\2.3\json-smart-2.3.jar;C:\Users\Shree\.m2\repository\net\minidev\accessors-smart\1.2\accessors-smart-1.2.jar;C:\Users\Shree\.m2\repository\org\ow2\asm\asm\5.0.4\asm-5.0.4.jar;C:\Users\Shree\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\Shree\.m2\repository\org\assertj\assertj-core\3.11.1\assertj-core-3.11.1.jar;C:\Users\Shree\.m2\repository\org\mockito\mockito-core\2.23.4\mockito-core-2.23.4.jar;C:\Users\Shree\.m2\repository\net\bytebuddy\byte-buddy\1.9.3\byte-buddy-1.9.3.jar;C:\Users\Shree\.m2\repository\net\bytebuddy\byte-buddy-agent\1.9.3\byte-buddy-agent-1.9.3.jar;C:\Users\Shree\.m2\repository\org\objenesis\objenesis\2.6\objenesis-2.6.jar;C:\Users\Shree\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\Shree\.m2\repository\org\hamcrest\hamcrest-library\1.3\hamcrest-library-1.3.jar;C:\Users\Shree\.m2\repository\org\skyscreamer\jsonassert\1.5.0\jsonassert-1.5.0.jar;C:\Users\Shree\.m2\repository\com\vaadin\external\google\android-json\0.0.20131108.vaadin1\android-json-0.0.20131108.vaadin1.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-core\5.1.6.RELEASE\spring-core-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-jcl\5.1.6.RELEASE\spring-jcl-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\springframework\spring-test\5.1.6.RELEASE\spring-test-5.1.6.RELEASE.jar;C:\Users\Shree\.m2\repository\org\xmlunit\xmlunit-core\2.6.2\xmlunit-core-2.6.2.jar" com.kafkaexample.SpringBootWithKafkaApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.4.RELEASE)
2019-06-19 18:27:44.241 INFO 10268 --- [ main] c.k.SpringBootWithKafkaApplication : Starting SpringBootWithKafkaApplication on DESKTOP-4IEB7U7 with PID 10268 (D:\tecor\Lugbee_data\Lugbee\lugbee_notification\kafkaWithSpringBoot\target\classes started by Shree in D:\tecor\Lugbee_data\Lugbee\lugbee_notification\kafkaWithSpringBoot)
2019-06-19 18:27:44.245 INFO 10268 --- [ main] c.k.SpringBootWithKafkaApplication : No active profile set, falling back to default profiles: default
2019-06-19 18:27:46.280 INFO 10268 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.kafka.annotation.KafkaBootstrapConfiguration' of type [org.springframework.kafka.annotation.KafkaBootstrapConfiguration$$EnhancerBySpringCGLIB$$9e6cbd54] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-06-19 18:27:48.100 INFO 10268 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-06-19 18:27:48.199 INFO 10268 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-06-19 18:27:48.199 INFO 10268 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.17]
2019-06-19 18:27:48.791 INFO 10268 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-06-19 18:27:48.791 INFO 10268 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 4443 ms
2019-06-19 18:27:49.430 INFO 10268 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-06-19 18:27:50.080 INFO 10268 --- [ main] o.a.k.clients.consumer.ConsumerConfig : ConsumerConfig values:
auto.commit.interval.ms = 5000
auto.offset.reset = earliest
bootstrap.servers = [localhost:9092]
check.crcs = true
client.id =
connections.max.idle.ms = 540000
default.api.timeout.ms = 60000
enable.auto.commit = true
exclude.internal.topics = true
fetch.max.bytes = 52428800
fetch.max.wait.ms = 500
fetch.min.bytes = 1
group.id = group_id
heartbeat.interval.ms = 3000
interceptor.classes = []
internal.leave.group.on.close = true
isolation.level = read_uncommitted
key.deserializer = class org.apache.kafka.common.serialization.StringDeserializer
max.partition.fetch.bytes = 1048576
max.poll.interval.ms = 300000
max.poll.records = 500
metadata.max.age.ms = 300000
metric.reporters = []
metrics.num.samples = 2
metrics.recording.level = INFO
metrics.sample.window.ms = 30000
partition.assignment.strategy = [class org.apache.kafka.clients.consumer.RangeAssignor]
receive.buffer.bytes = 65536
reconnect.backoff.max.ms = 1000
reconnect.backoff.ms = 50
request.timeout.ms = 30000
retry.backoff.ms = 100
sasl.client.callback.handler.class = null
sasl.jaas.config = null
sasl.kerberos.kinit.cmd = /usr/bin/kinit
sasl.kerberos.min.time.before.relogin = 60000
sasl.kerberos.service.name = null
sasl.kerberos.ticket.renew.jitter = 0.05
sasl.kerberos.ticket.renew.window.factor = 0.8
sasl.login.callback.handler.class = null
sasl.login.class = null
sasl.login.refresh.buffer.seconds = 300
sasl.login.refresh.min.period.seconds = 60
sasl.login.refresh.window.factor = 0.8
sasl.login.refresh.window.jitter = 0.05
sasl.mechanism = GSSAPI
security.protocol = PLAINTEXT
send.buffer.bytes = 131072
session.timeout.ms = 10000
ssl.cipher.suites = null
ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1]
ssl.endpoint.identification.algorithm = https
ssl.key.password = null
ssl.keymanager.algorithm = SunX509
ssl.keystore.location = null
ssl.keystore.password = null
ssl.keystore.type = JKS
ssl.protocol = TLS
ssl.provider = null
ssl.secure.random.implementation = null
ssl.trustmanager.algorithm = PKIX
ssl.truststore.location = null
ssl.truststore.password = null
ssl.truststore.type = JKS
value.deserializer = class org.apache.kafka.common.serialization.StringDeserializer
2019-06-19 18:27:50.257 INFO 10268 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka version : 2.0.1
2019-06-19 18:27:50.257 INFO 10268 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka commitId : fa14705e51bd2ce5
2019-06-19 18:27:50.504 INFO 10268 --- [ main] org.apache.kafka.clients.Metadata : Cluster ID: 8MB-usFlR12orAsTFzBlng
2019-06-19 18:27:50.524 INFO 10268 --- [ main] o.a.k.clients.consumer.ConsumerConfig : ConsumerConfig values:
auto.commit.interval.ms = 5000
auto.offset.reset = earliest
bootstrap.servers = [localhost:9092]
check.crcs = true
client.id =
connections.max.idle.ms = 540000
default.api.timeout.ms = 60000
enable.auto.commit = true
exclude.internal.topics = true
fetch.max.bytes = 52428800
fetch.max.wait.ms = 500
fetch.min.bytes = 1
group.id = group_id
heartbeat.interval.ms = 3000
interceptor.classes = []
internal.leave.group.on.close = true
isolation.level = read_uncommitted
key.deserializer = class org.apache.kafka.common.serialization.StringDeserializer
max.partition.fetch.bytes = 1048576
max.poll.interval.ms = 300000
max.poll.records = 500
metadata.max.age.ms = 300000
metric.reporters = []
metrics.num.samples = 2
metrics.recording.level = INFO
metrics.sample.window.ms = 30000
partition.assignment.strategy = [class org.apache.kafka.clients.consumer.RangeAssignor]
receive.buffer.bytes = 65536
reconnect.backoff.max.ms = 1000
reconnect.backoff.ms = 50
request.timeout.ms = 30000
retry.backoff.ms = 100
sasl.client.callback.handler.class = null
sasl.jaas.config = null
sasl.kerberos.kinit.cmd = /usr/bin/kinit
sasl.kerberos.min.time.before.relogin = 60000
sasl.kerberos.service.name = null
sasl.kerberos.ticket.renew.jitter = 0.05
sasl.kerberos.ticket.renew.window.factor = 0.8
sasl.login.callback.handler.class = null
sasl.login.class = null
sasl.login.refresh.buffer.seconds = 300
sasl.login.refresh.min.period.seconds = 60
sasl.login.refresh.window.factor = 0.8
sasl.login.refresh.window.jitter = 0.05
sasl.mechanism = GSSAPI
security.protocol = PLAINTEXT
send.buffer.bytes = 131072
session.timeout.ms = 10000
ssl.cipher.suites = null
ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1]
ssl.endpoint.identification.algorithm = https
ssl.key.password = null
ssl.keymanager.algorithm = SunX509
ssl.keystore.location = null
ssl.keystore.password = null
ssl.keystore.type = JKS
ssl.protocol = TLS
ssl.provider = null
ssl.secure.random.implementation = null
ssl.trustmanager.algorithm = PKIX
ssl.truststore.location = null
ssl.truststore.password = null
ssl.truststore.type = JKS
value.deserializer = class org.apache.kafka.common.serialization.StringDeserializer
2019-06-19 18:27:50.534 INFO 10268 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka version : 2.0.1
2019-06-19 18:27:50.534 INFO 10268 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka commitId : fa14705e51bd2ce5
2019-06-19 18:27:50.540 INFO 10268 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService
2019-06-19 18:27:50.599 WARN 10268 --- [ntainer#0-0-C-1] org.apache.kafka.clients.NetworkClient : [Consumer clientId=consumer-2, groupId=group_id] 1 partitions have leader brokers without a matching listener, including [users-0]
2019-06-19 18:27:50.600 INFO 10268 --- [ntainer#0-0-C-1] org.apache.kafka.clients.Metadata : Cluster ID: 8MB-usFlR12orAsTFzBlng
2019-06-19 18:27:50.628 INFO 10268 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-06-19 18:27:50.633 INFO 10268 --- [ main] c.k.SpringBootWithKafkaApplication : Started SpringBootWithKafkaApplication in 7.171 seconds (JVM running for 7.869)
-------------
service started
-------------
2019-06-19 18:27:50.706 WARN 10268 --- [ntainer#0-0-C-1] org.apache.kafka.clients.NetworkClient : [Consumer clientId=consumer-2, groupId=group_id] 1 partitions have leader brokers without a matching listener, including [users-0]
2019-06-19 18:27:50.706 WARN 10268 --- [ntainer#0-0-C-1] org.apache.kafka.clients.NetworkClient : [Consumer clientId=consumer-2, groupId=group_id] 1 partitions have leader brokers without a matching listener, including [users-0]
->此日志显示无限时间。同样，当我使用cmd命令通过窗口控制台运行生产者和消费者时，也会在消费者控制台中给我同样的警告。
我点击了此链接 here is link which i followed to create topic, run producer and consumer in cmd
创建主题并运行生产者的命令已成功运行，但是当我运行消费者时，它向我显示了提及警告
答案 0 :(得分：0)
发生此错误的原因是，如果您单独使用Zookeeper，则您正在使用内置的Zookeeper，那么您的问题将得到解决。要分别设置Zookeeper，请执行以下操作：
从http://zookeeper.apache.org/releases.html下载ZooKeeper
ZooKeeper安装
转到您的ZooKeeper配置目录。对我来说，它的C：\ zookeeper-3.4.7 \ conf
将文件“ zoo_sample.cfg”重命名为“ zoo.cfg”
在任何文本编辑器（例如记事本）中打开zoo.cfg；我更喜欢Notepad ++。
查找并编辑dataDir = / tmp / zookeeper到：\ zookeeper-3.4.7 \ data
像在Java中一样在“系统环境变量”中添加一个条目。
a。将ZOOKEEPER_HOME = C：\ zookeeper-3.4.7添加到系统变量中。
b。编辑名为“ Path”的系统变量，并添加;％ZOOKEEPER_HOME％\ bin;。
您可以在zoo.cfg文件中更改默认的Zookeeper端口（默认端口2181）。
通过打开一个新的cmd并键入zkserver来运行ZooKeeper。
注意：进入bin目录后，在cmd中运行zkserver命令。
此Zookeeper服务器成功启动后，现在您将来将不会遇到任何错误。