使用AWS MSK NOT_ENOUGH_REPLICAS的Debezium

Question

我在AWS中有一个正在运行的debezium集群，没有问题。我想尝试一下AWS MSK。所以我启动了一个集群。然后我启动了一个EC2来运行我的连接器。

然后安装confluent-kafka

sudo apt-get update && sudo apt-get install confluent-platform-2.12

默认情况下，AWS MSK没有模式注册表，所以我在连接器EC2模式注册表conf文件中对其进行了配置：

kafkastore.connection.url=z-1.bhuvi-XXXXXXXXX.amazonaws.com:2181,z-3.bhuvi-XXXXXXXXX.amazonaws.com:2181,z-2.bhuvi-XXXXXXXXX.amazonaws.com:2181


kafkastore.bootstrap.servers=PLAINTEXT://b-2.bhuvi-XXXXXXXXX.amazonaws.com:9092,PLAINTEXT://b-4.bhuvi-XXXXXXXXX.amazonaws.com:9092,PLAINTEXT://b-1.bhuvi-XXXXXXXXX.amazonaws.com:9092

然后是/etc/kafka/connect-distributed.properties文件

bootstrap.servers=b-4.bhuvi-XXXXXXXXX.amazonaws.com:9092,b-3.bhuvi-XXXXXXXXX.amazonaws.com:9092,b-2.bhuvi-XXXXXXXXX.amazonaws.com:9092

plugin.path=/usr/share/java,/usr/share/confluent-hub-components

安装连接器：

confluent-hub install debezium/debezium-connector-mysql:latest

启动服务

systemctl start confluent-schema-registry
systemctl start confluent-connect-distributed

现在一切都开始了。然后我创建了一个mysql.json文件。

{
    "name": "mysql-connector-db01",
    "config": {
        "name": "mysql-connector-db01",
        "connector.class": "io.debezium.connector.mysql.MySqlConnector",
        "database.server.id": "1",
        "tasks.max": "3",
        "database.history.kafka.bootstrap.servers": "172.31.47.152:9092,172.31.38.158:9092,172.31.46.207:9092",
        "database.history.kafka.topic": "schema-changes.mysql",
        "database.server.name": "mysql-db01",
        "database.hostname": "172.31.84.129",
        "database.port": "3306",
        "database.user": "bhuvi",
        "database.password": "my_stong_password",
        "database.whitelist": "proddb,test",
        "internal.key.converter.schemas.enable": "false",
        "key.converter.schemas.enable": "false",
        "internal.key.converter": "org.apache.kafka.connect.json.JsonConverter",
        "internal.value.converter.schemas.enable": "false",
        "value.converter.schemas.enable": "false",
        "internal.value.converter": "org.apache.kafka.connect.json.JsonConverter",
        "value.converter": "org.apache.kafka.connect.json.JsonConverter",
        "key.converter": "org.apache.kafka.connect.json.JsonConverter",
        "transforms": "unwrap",
        "transforms.unwrap.type": "io.debezium.transforms.ExtractNewRecordState"
        "transforms.unwrap.add.source.fields": "ts_ms",
    }
}

创建debezium连接器

curl -X POST -H "Accept: application/json" -H "Content-Type: application/json" http://localhost:8083/connectors -d @mysql.josn

然后声明在连接器EC2中给出了这个错误。

Dec 20 11:42:36 ip-172-31-44-220 connect-distributed[2630]: [2019-12-20 11:42:36,290] WARN [Producer clientId=producer-3] Got error produce response with correlation id 844 on topic-partition connect-configs-0, retrying (2147482809 attempts left). Error: NOT_ENOUGH_REPLICAS (org.apache.kafka.clients.producer.internals.Sender:637)
Dec 20 11:42:36 ip-172-31-44-220 connect-distributed[2630]: [2019-12-20 11:42:36,391] WARN [Producer clientId=producer-3] Got error produce response with correlation id 845 on topic-partition connect-configs-0, retrying (2147482808 attempts left). Error: NOT_ENOUGH_REPLICAS (org.apache.kafka.clients.producer.internals.Sender:637)
Dec 20 11:42:36 ip-172-31-44-220 connect-distributed[2630]: [2019-12-20 11:42:36,492] WARN [Producer clientId=producer-3] Got error produce response with correlation id 846 on topic-partition connect-configs-0, retrying (2147482807 attempts left). Error: NOT_ENOUGH_REPLICAS (org.apache.kafka.clients.producer.internals.Sender:637)
Dec 20 11:42:36 ip-172-31-44-220 connect-distributed[2630]: [2019-12-20 11:42:36,593] WARN [Producer clientId=producer-3] Got error produce response with correlation id 847 on topic-partition connect-configs-0, retrying (2147482806 attempts left). Error: NOT_ENOUGH_REPLICAS (org.apache.kafka.clients.producer.internals.Sender:637)

它永远不会停止此错误消息。

连接配置的描述

Topic:connect-configs   PartitionCount:1        ReplicationFactor:1     Configs:cleanup.policy=compact
        Topic: connect-configs  Partition: 0    Leader: 2       Replicas: 2     Isr: 2

Answer 1

默认情况下，MSK将所有主题的min.in.sync.replicas设置为2(请参阅https://docs.aws.amazon.com/msk/latest/developerguide/msk-default-configuration.html)

Kafka Connect可能正在使用ACKs="all“进行制作，并且，由于您只有一个主题副本，因此它永远不会达到足够的法定人数。