当kafkaProducer第一次尝试发送记录时无法创建主题INVALID_REPLICATION_FACTOR

Question

尝试将第一条消息发布到新主题时，我在日志中收到以下错误。

[警告] [oakafka.clients.NetworkClient][[Producer clientId= Producer-1] 获取相关 ID 为 766890 的元数据时出错：{myTopic-1=INVALID_REPLICATION_FACTOR，myTopic-2=INVALID_REPLICATION_FACTOR}] []

卡夫卡失败挂在：

"Hashed wheel timer #1" #521 prio=5 os_prio=0 tid=0x00007f932cd7d000 nid=0x199fa in Object.wait() [0x00007f9322b79000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at org.apache.kafka.clients.Metadata.awaitUpdate(Metadata.java:177)
    - locked <0x000000047838b990> (a org.apache.kafka.clients.Metadata)
    at org.apache.kafka.clients.producer.KafkaProducer.waitOnMetadata(KafkaProducer.java:903)
    at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:794)
    at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:784)

我们使用的kafka jar版本是：0.10.0.1

代理上的 server.properties 是：

broker.id=3
host.name=<>
port=9092

message.max.bytes=20971520
num.partitions=30
auto.create.topics.enable=true

# Replication configurations
default.replication.factor=2
num.replica.fetchers=2
replica.fetch.max.bytes=20971520


log.dirs=/mnt1/data/kafka/kafka-logs-3
log.retention.hours=48
log.flush.interval.ms=10000
log.flush.interval.messages=20000
log.flush.scheduler.interval.ms=2000
log.cleanup.interval.mins=30

zookeeper.connect=<>
zookeeper.connection.timeout.ms=1000000

# Socket server configuration
num.io.threads=8
num.network.threads=8
socket.request.max.bytes=20971520
socket.receive.buffer.bytes=20971520
socket.send.buffer.bytes=20971520
queued.max.requests=32
fetch.purgatory.purge.interval.requests=100
producer.purgatory.purge.interval.requests=100

inter.broker.protocol.version=0.10.2.0
log.message.format.version=0.10.0
delete.topic.enable=true

为什么我无法发送消息？主题本身并未被创建！正在使用的生产者属性是：

Properties props = new Properties();
        props.put("acks", "0");
        props.put("retries", "0");
        props.put("batch.size", "16384");
        props.put("linger.ms", "100");
        props.put("buffer.memory", "33554432");
        props.put("key.serializer", "org.apache.kafka.common.serialization.IntegerSerializer");
        props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        props.put("max.request.size", String.valueOf(ByteUnit.MB.toBytes(10)));
        return props;

Answer 1

集群中有多少个代理？is default.replication.factor，2这意味着您必须至少有 2 个正在运行的代理。