无法启动合流模式注册表

Question

我已经在Ubuntu16.04机器上安装了汇合平台，最初我已经配置了动物园管理员、Kafka和ksql，并启动了合流平台。我能看到下面的信息。

 root@DESKTOP-DIB3097:/opt/kafkafull/confluent-5.1.0/bin# ./confluent start
 This CLI is intended for development only, not for production
 https://docs.confluent.io/current/cli/index.html
 Using CONFLUENT_CURRENT: /tmp/confluent.HUlCltYT
 Starting zookeeper
 zookeeper is [UP]
 Starting kafka
 kafka is [UP]
 Starting schema-registry
 schema-registry is [UP]
 Starting kafka-rest
 kafka-rest is [UP]
 Starting connect
 connect is [UP]
 Starting ksql-server
 ksql-server is [UP]
 Starting control-center
 control-center is [UP]

现在一切都结束了，当我检查汇合平台的状态时，我注意到Schema注册表、连接和控制中心已经关闭。

我已经检查了模式注册表的日志，并发现了下面的日志。

ERROR Error starting the schema registry (io.confluent.kafka.schemaregistry.rest.SchemaRegistryRestApplication)
io.confluent.kafka.schemaregistry.exceptions.SchemaRegistryInitializationException: Error initializing kafka store while initializing schema registry
        at io.confluent.kafka.schemaregistry.storage.KafkaSchemaRegistry.init(KafkaSchemaRegistry.java:210)
        at io.confluent.kafka.schemaregistry.rest.SchemaRegistryRestApplication.initSchemaRegistry(SchemaRegistryRestApplication.java:61)
        at io.confluent.kafka.schemaregistry.rest.SchemaRegistryRestApplication.setupResources(SchemaRegistryRestApplication.java:72)
        at io.confluent.kafka.schemaregistry.rest.SchemaRegistryRestApplication.setupResources(SchemaRegistryRestApplication.java:39)
        at io.confluent.rest.Application.createServer(Application.java:201)
        at io.confluent.kafka.schemaregistry.rest.SchemaRegistryMain.main(SchemaRegistryMain.java:41)
Caused by: io.confluent.kafka.schemaregistry.storage.exceptions.StoreInitializationException: io.confluent.kafka.schemaregistry.storage.exceptions.StoreException: Failed to write Noop record to kafka store.
        at io.confluent.kafka.schemaregistry.storage.KafkaStore.init(KafkaStore.java:137)
        at io.confluent.kafka.schemaregistry.storage.KafkaSchemaRegistry.init(KafkaSchemaRegistry.java:208)
        ... 5 more
Caused by: io.confluent.kafka.schemaregistry.storage.exceptions.StoreException: Failed to write Noop record to kafka store.
        at io.confluent.kafka.schemaregistry.storage.KafkaStore.getLatestOffset(KafkaStore.java:422)
        at io.confluent.kafka.schemaregistry.storage.KafkaStore.waitUntilKafkaReaderReachesLastOffset(KafkaStore.java:275)
        at io.confluent.kafka.schemaregistry.storage.KafkaStore.init(KafkaStore.java:135)
        ... 6 more
Caused by: java.util.concurrent.TimeoutException: Timeout after waiting for 60000 ms.
        at org.apache.kafka.clients.producer.internals.FutureRecordMetadata.get(FutureRecordMetadata.java:78)
        at org.apache.kafka.clients.producer.internals.FutureRecordMetadata.get(FutureRecordMetadata.java:30)
        at io.confluent.kafka.schemaregistry.storage.KafkaStore.getLatestOffset(KafkaStore.java:417)
        ... 8 more

Answer 1

在$CONFLUENT_HOME/etc/kafka中，您将看到server.properties。

取消对以下内容的注释并按以下方式更新

1. listeners=PLAINTEXT://0.0.0.0:9092
2. advertised.listeners=PLAINTEXT://localhost:9092
3. listener.security.protocol.map=PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL

在$CONFLUENT_HOME/etc/schema-registry中，您将看到模式-Regiy.properties，打开并更新如下

1. listeners=http://0.0.0.0:9092

Answer 2

我想，我找到了答案，

在Kafka配置文件中，添加属性host.name=host_ip_address，它将充当Kafka主机。因此，在任何Kafka引导属性出现的所有配置文件中，将其更改为相应的主机名或IP地址，如下所示。

bootstrap.servers=192.168.0.193:9092

示例：在架构注册表配置中，我将以下属性从本地主机更改为相应的IP地址

kafkastore.bootstrap.servers=PLAINTEXT://192.168.0.193:9092 ##

在其他文件中，检查属性bootstrap.servers=192.168.0.193:9092是否正确引用。并检查架构注册表配置文件是否正确引用。

(您实际上可以检查和比较/tmp/confluent kafka日志中的配置文件)

现在，在更改所有配置文件之后，服务已经启动并运行。