./kafka-consumer-groups.sh --bootstrap-server iotgz.kafkapush1.szgz.com:9092 --group rule-engine-service --describe

要通过`./kafka-consumer-groups.sh`命令描述指定消费者组`rule-engine-service`的状态，你需要连接到Bootstrap服务器`iotgz.kafkapush1.szgz.com:9092`。以下是执行此操作的步骤：

1. 打开终端并切换到Kafka安装目录，通常是`/usr/local/kafka/kafka_2.13-2.7.1/bin`。

2. 使用以下命令来运行`kafka-consumer-groups.sh`工具[^1]:

   ./kafka-consumer-groups.sh --bootstrap-server iotgz.kafkapush1.szgz.com:9092 --group rule-engine-service --describe

这个命令会显示`rule-engine-service`消费者组中各个消费者的详细信息，包括它们正在消费的主题、偏移量以及一些统计信息。

如果在启动过程中遇到`java: not found`的错误，确保Java环境变量设置正确并且`JAVA`路径指向Java的安装位置。如果`JAVA_HOME`环境变量没有设置，可以尝试添加如下：

export JAVA_HOME=/path/to/java

替换`/path/to/java`为实际的Java安装目录。

相关问题

bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group test 用java实现

你可以使用 Kafka 的 Java API 来实现这个命令，具体实现如下：

import org.apache.kafka.clients.admin.AdminClient;
import org.apache.kafka.clients.admin.AdminClientConfig;
import org.apache.kafka.clients.admin.ConsumerGroupDescription;
import org.apache.kafka.clients.admin.ConsumerGroupListing;
import org.apache.kafka.clients.admin.ListConsumerGroupOffsetsResult;
import org.apache.kafka.clients.admin.ListConsumerGroupsResult;
import org.apache.kafka.clients.admin.ListOffsetsResult;
import org.apache.kafka.clients.admin.OffsetSpec;
import org.apache.kafka.clients.admin.TopicDescription;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.serialization.StringDeserializer;

import java.time.Duration;
import java.util.Collections;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ExecutionException;

public class KafkaConsumerGroups {

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Properties adminProps = new Properties();
        adminProps.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        AdminClient adminClient = AdminClient.create(adminProps);

        // List Consumer Groups
        ListConsumerGroupsResult consumerGroupsResult = adminClient.listConsumerGroups();
        Set<ConsumerGroupListing> consumerGroups = consumerGroupsResult.all().get();
        for (ConsumerGroupListing group : consumerGroups) {
            System.out.println("Consumer Group: " + group.groupId());
            // Describe Consumer Group
            ConsumerGroupDescription consumerGroupDescription = adminClient.describeConsumerGroups(Collections.singleton(group.groupId())).all().get().get(group.groupId());
            System.out.println("State: " + consumerGroupDescription.state());
            System.out.println("Coordinator: " + consumerGroupDescription.coordinator().toString());
            System.out.println("Members: " + consumerGroupDescription.members().size());
            System.out.println("Topic Partitions:");
            Map<String, TopicDescription> topicDescriptions = adminClient.describeTopics(consumerGroupDescription.members().stream().map(member -> member.assignment().topicPartitions().iterator().next().topic()).distinct().toArray(String[]::new)).all().get();
            for (TopicDescription topicDescription : topicDescriptions.values()) {
                for (TopicPartition partition : topicDescription.partitions()) {
                    System.out.println("\t" + topicDescription.name() + "-" + partition.partition() + ": " + consumerGroupDescription.assignment().partitionsForTopic(topicDescription.name()).contains(partition));
                }
            }

            // List Consumer Group Offsets
            ListConsumerGroupOffsetsResult consumerGroupOffsetsResult = adminClient.listConsumerGroupOffsets(group.groupId());
            Map<TopicPartition, Long> consumerGroupOffsets = consumerGroupOffsetsResult.partitionsToOffsetAndMetadata().get();
            System.out.println("Consumer Group Offsets:");
            for (Map.Entry<TopicPartition, Long> entry : consumerGroupOffsets.entrySet()) {
                System.out.println("\t" + entry.getKey().topic() + "-" + entry.getKey().partition() + ": " + entry.getValue());
            }

            // List Latest Offsets
            Properties consumerProps = new Properties();
            consumerProps.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
            consumerProps.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "false");
            consumerProps.put(ConsumerConfig.GROUP_ID_CONFIG, group.groupId());
            consumerProps.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
            consumerProps.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
            KafkaConsumer<String, String> consumer = new KafkaConsumer<>(consumerProps);
            Map<TopicPartition, Long> latestOffsets = consumer.endOffsets(consumerGroupOffsets.keySet(), Duration.ofSeconds(5));
            System.out.println("Latest Offsets:");
            for (Map.Entry<TopicPartition, Long> entry : latestOffsets.entrySet()) {
                System.out.println("\t" + entry.getKey().topic() + "-" + entry.getKey().partition() + ": " + entry.getValue());
            }

            // List Earliest Offsets
            Map<TopicPartition, Long> earliestOffsets = consumer.beginningOffsets(consumerGroupOffsets.keySet(), Duration.ofSeconds(5));
            System.out.println("Earliest Offsets:");
            for (Map.Entry<TopicPartition, Long> entry : earliestOffsets.entrySet()) {
                System.out.println("\t" + entry.getKey().topic() + "-" + entry.getKey().partition() + ": " + entry.getValue());
            }
        }
    }
}

这个程序使用 Kafka 的 AdminClient 来获取消费者组信息、消费者组偏移量以及主题分区的最早和最新偏移量。你可以根据自己的需求修改程序，例如只获取特定的消费者组信息等。

kafka重启 ./kafka-server-start.sh config/

您好！对于重启 Kafka，您可以执行以下命令：

./kafka-server-start.sh config/server.properties

上述命令假设 `kafka-server-start.sh` 脚本和 `config/server.properties` 配置文件位于当前工作目录下。请确保您已进入正确的 Kafka 安装目录，并根据您的实际情况修改路径。

执行该命令后，Kafka 服务器将以指定的配置文件重新启动。请注意，如果您对配置进行了更改，这些更改将在重启后生效。