kafka 安装内存会报不够

        https://stackoverflow.com/questions/9350437/incompatible-initial-and-maximum-heap-sizes-specified

Picked up _JAVA_OPTIONS: -Xmx1024M

OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000b5a00000, 1073741824, 0) failed; error='Cannot allocate memory' (errno=12)

#

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (malloc) failed to allocate 1073741824 bytes for committing reserved memory.

需要调整jvm

 

export _JAVA_OPTIONS=-Xmx1024M

export _JAVA_OPTIONS=-Xms512M

 

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

Picked up _JAVA_OPTIONS: -Xms512M

 

创建topic 

bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic a2

Created topic "a2".

查看topic

       bin/kafka-topics.sh --list --zookeeper localhost:2181

发送消息到指定的topic 

　　bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test

   

 WARN [Producer clientId=console-producer] Error while fetching metadata with correlation id 1 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)

　　如果发现是没有leader的提示错误，需要修改配置文件

"github.com/Shopify/sarama" 不支持group，不支持rebanlance。
 1 func kafka_exampe() {
 2 
 3     consumer, err := sarama.NewConsumer([]string{"192.168.199.133:9092"}, nil)
 4     if err != nil {
 5         panic(err)
 6     }
 7 
 8     defer func() {
 9         if err := consumer.Close(); err != nil {
10             log.Fatalln(err)
11         }
12     }()
13 
14     partitionConsumer, err := consumer.ConsumePartition("test", 0, sarama.OffsetNewest)
15     if err != nil {
16         panic(err)
17     }
18 
19     defer func() {
20         if err := partitionConsumer.Close(); err != nil {
21             log.Fatalln(err)
22         }
23     }()
24 
25     // Trap SIGINT to trigger a shutdown.
26     signals := make(chan os.Signal, 1)
27     signal.Notify(signals, os.Interrupt)
28 
29     consumed := 0
30 ConsumerLoop:
31     for {
32         select {
33         case msg := <-partitionConsumer.Messages():
34             log.Printf("Consumed message offset %d\n", msg.Offset)
35             log.Printf(string(msg.Value))
36             consumed++
37         case <-signals:
38             break ConsumerLoop
39         }
40     }
41 
42     log.Printf("Consumed: %d\n", consumed)
43 }