bug log：

[2016-07-31 23:50:48,022] ERROR [KafkaApi-0] Error when handling request {group_id=kafka-python-default-group} (kafka.server.KafkaApis)
kafka.admin.AdminOperationException: replication factor: 3 larger than available brokers: 1
        at kafka.admin.AdminUtils$.assignReplicasToBrokers(AdminUtils.scala:117)
        at kafka.admin.AdminUtils$.createTopic(AdminUtils.scala:403)
        at kafka.server.KafkaApis.kafka$server$KafkaApis$$createTopic(KafkaApis.scala:629)
        at kafka.server.KafkaApis.kafka$server$KafkaApis$$createGroupMetadataTopic(KafkaApis.scala:651)
        at kafka.server.KafkaApis$$anonfun$getOrCreateGroupMetadataTopic$1.apply(KafkaApis.scala:657)
        at kafka.server.KafkaApis$$anonfun$getOrCreateGroupMetadataTopic$1.apply(KafkaApis.scala:657)
        at scala.Option.getOrElse(Option.scala:121)
        at kafka.server.KafkaApis.getOrCreateGroupMetadataTopic(KafkaApis.scala:657)
        at kafka.server.KafkaApis.handleGroupCoordinatorRequest(KafkaApis.scala:818)
        at kafka.server.KafkaApis.handle(KafkaApis.scala:86)
        at kafka.server.KafkaRequestHandler.run(KafkaRequestHandler.scala:60)
        at java.lang.Thread.run(Thread.java:745)

原因：

docker跑了一个kafka和zookeeper，

compos.yml文件中如下：

version: '2'

services:

  zookeeper:

    image: wurstmeister/zookeeper

    ports:

      - "2181:2181"

  kafka:

    image: wurstmeister/kafka

    ports:

      - "9092:9092"

    environment:

      KAFKA_ADVERTISED_HOST_NAME: 172.18.129.0

      KAFKA_CREATE_TOPICS: "apple:1:1,orang:3:3"

      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181

    volumes:

      - /var/run/docker.sock:/var/run/docker.sock

坑在：

    KAFKA_CREATE_TOPICS: "apple:1:1,orang:3:3"