从flinkkafkaconsumer09更改为flinkkafkaconsumer flink代码时出现新错误：

import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
import org.apache.flink.streaming.util.serialization.SimpleStringSchema;
import java.util.Properties;
@SuppressWarnings("deprecation")
public class ReadFromKafka {
  public static void main(String[] args) throws Exception {
    // create execution environment
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    Properties properties = new Properties();
    properties.setProperty("bootstrap.servers", "localhost:9092");
    properties.setProperty("group.id", "test-consumer-group");
    DataStream<String> stream = env
            .addSource(new FlinkKafkaConsumer<String>("test4", new SimpleStringSchema(), properties));
    stream.map(new MapFunction<String, String>() {
      private static final long serialVersionUID = -6867736771747690202L;
      @Override
      public String map(String value) throws Exception {
        return "Stream Value: " + value;
      }
    }).print();
    env.execute();
  }
}

错误：log4j:warn找不到记录器（org.apache.flink.api.java.closurecleaner）的附加程序。log4j:warn请正确初始化log4j系统。log4j：请参阅http://logging.apache.org/log4j/1.2/faq.html#noconfig 更多信息。线程“main”org.apache.flink.runtime.client.jobexecutionexception中出现异常：作业执行失败。在org.apache.flink.runtime.jobmaster.jobresult.tojobexecutionresult（jobresult。java:146)在org.apache.flink.runtime.minicluster.minicluster.executejobblocking（minicluster。java:626)位于org.apache.flink.streaming.api.environment.localstreamenvironment.execute（localstreamenvironment）。java:117)在org.apache.flink.streaming.api.environment.streamexecutionenvironment.execute（streamexecutionenvironment。java:1507)位于org.apache.flink.streaming.api.environment.streamexecutionenvironment.execute（streamexecutionenvironment）。java:1489)在readfromkafka.main（readfromkafka。java:33)原因：org.apache.kafka.common.errors.timeoutexception:超时获取主题元数据时过期
pom.xml文件

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.dataartisans</groupId>
  <artifactId>kafka-example</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>kafkaex</name>
  <description>this is flink kafka example</description>
  <dependencies>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-java</artifactId>
        <version>1.9.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-streaming-java_2.12</artifactId>
        <version>1.9.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-clients_2.12</artifactId>
        <version>1.9.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-connector-kafka_2.12</artifactId>
        <version>1.9.1</version>
    </dependency>
    <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-core</artifactId>
    <version>1.9.1</version>
</dependency>
    <dependency>
        <groupId>com.googlecode.json-simple</groupId>
        <artifactId>json-simple</artifactId>
        <version>1.1</version>
    </dependency>  
</dependencies>
</project>