尝试使用Zookeer独立版(3.4.5)从Kafka(2.9.2-0.8.1)“消费”消息时出错。您可以在下面看到源代码以及Zookeeper中的错误消息和日志文件。
我不确定Java库是否不兼容,因为我通过Maven添加了依赖关系kafka_0.9.2(0.8.1),它自动解决了zkclient(0.3)和zookeeper(3.3.4)的依赖关系。
消费者源代码:
import java.util.Properties;
import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.javaapi.consumer.ConsumerConnector;
public class ConsumerTest {
public static void main(String[] args)
{
try
{
Properties props = new Properties();
props.put("zookeeper.connect", "192.168.0.1:2181/kafka");
props.put("group.id", "my-consumer");
props.put("zookeeper.session.timeout.ms", "400");
props.put("zookeeper.sync.time.ms", "200");
props.put("auto.commit.interval.ms", "1000");
ConsumerConfig config = new ConsumerConfig(props);
@SuppressWarnings("unused")
ConsumerConnector consumer = Consumer.createJavaConsumerConnector(config);
}
catch(Exception e)
{
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}
pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test.my</groupId>
<artifactId>kafka-consumer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.9.2</artifactId>
<exclusions>
<exclusion>
<artifactId>jms</artifactId>
<groupId>javax.jms</groupId>
</exclusion>
<exclusion>
<artifactId>jmxtools</artifactId>
<groupId>com.sun.jdmk</groupId>
</exclusion>
<exclusion>
<artifactId>jmxri</artifactId>
<groupId>com.sun.jmx</groupId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.9.2</artifactId>
<version>0.8.1</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>
异常消息和堆栈跟踪:
Unable to connect to zookeeper server within timeout: 400
org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server within timeout: 400
at org.I0Itec.zkclient.ZkClient.connect(ZkClient.java:880)
at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:98)
at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:84)
at kafka.consumer.ZookeeperConsumerConnector.connectZk(ZookeeperConsumerConnector.scala:156)
at kafka.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:114)
at kafka.javaapi.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:65)
at kafka.javaapi.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:67)
at kafka.consumer.Consumer$.createJavaConsumerConnector(ConsumerConnector.scala:100)
at kafka.consumer.Consumer.createJavaConsumerConnector(ConsumerConnector.scala)
at ConsumerTest.main(ConsumerTest.java:23)
zookeeper日志:
2014-05-06 11:48:11,907 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /192.168.0.4:52568
2014-05-06 11:48:11,909 [myid:] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@349] - caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x0, likely client has closed socket
at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:220)
at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
at java.lang.Thread.run(Thread.java:701)
2014-05-06 11:48:11,909 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1001] - Closed socket connection for client /192.168.0.4:52568 (no session established for client)
注意我可以使用命令行工具从Kafka节点成功“生成”和“使用”消息:
$ sudo -u kafka bin/kafka-console-producer.sh --broker-list 192.168.0.2:9092,192.168.0.3:9092 --topic my-topic
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
This is a first message.
This is a second message.
$ sudo -u kafka bin/kafka-console-consumer.sh --zookeeper 192.168.0.1:2181/kafka --topic my-topic --from-beginning
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
This is a first message.
This is a second message.
我甚至可以从Java客户端生产者成功生成消息。
答案 0 :(得分:2)
我遇到了同样的问题,我已经解决了。动物园管理员超时太小了。