Question

我在VirtualBox上有一个Flink Cluster，包含三个节点，一个主节点和两个从节点。我定制了WordCount示例并使用VirtualBox Flink远程集群创建了一个胖jar文件来运行它，但我遇到了错误。

注意：我手动将依赖项导入项目（使用Intellij IDEA），我没有使用maven作为依赖项提供程序。我在本地机器上测试我的代码就可以了！

更多详情如下：

这是我的Java代码：

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.utils.ParameterTool;
import org.apache.flink.util.Collector;

public class WordCount {

// *************************************************************************
//     PROGRAM
// *************************************************************************

public static void main(String[] args) throws Exception {

    final ParameterTool params = ParameterTool.fromArgs(args);
    final int port;
    final String ip;
    DataSet<String> text;
    try {
        ip = params.get("ip");
        port = params.getInt("port");
        final ExecutionEnvironment env = ExecutionEnvironment.createRemoteEnvironment(ip, port, 2);
        text = env.readTextFile(params.get("input"));
    } catch (Exception e) {
        System.err.println("No port or input or ip specified. Please run 'SocketWindowWordCount --ip <ip> --port <port>'" +
                " --input <input>");
        return;
    }

    DataSet<Tuple2<String, Integer>> counts =
            // split up the lines in pairs (2-tuples) containing: (word,1)
            text.flatMap(new Tokenizer())
                    // group by the tuple field "0" and sum up tuple field "1"
                    .groupBy(0)
                    .sum(1);

    System.out.println("Printing result to stdout. Use --output to specify output path.");
    counts.print();

}

// *************************************************************************
//     USER FUNCTIONS
// *************************************************************************

/**
 * Implements the string tokenizer that splits sentences into words as a user-defined
 * FlatMapFunction. The function takes a line (String) and splits it into
 * multiple pairs in the form of "(word,1)" ({@code Tuple2<String, Integer>}).
 */
public static final class Tokenizer implements FlatMapFunction<String, Tuple2<String, Integer>> {

    @Override
    public void flatMap(String value, Collector<Tuple2<String, Integer>> out) {
        // normalize and split the line
        String[] tokens = value.toLowerCase().split("\\W+");

        // emit the pairs
        for (String token : tokens) {
            if (token.length() > 0) {
                out.collect(new Tuple2<String, Integer>(token, 1));
            }
        }
    }
}

}

我使用命令

创建了ExecutionEnvironment对象

final ExecutionEnvironment env = ExecutionEnvironment.createRemoteEnvironment(ip, port, 2);

，我在主机上使用以下命令运行代码（连接到群集节点并运行VirtualBox）

java -cp FlinkWordCountClusetr.jar WordCount --ip 192.168.101.10 --port 6123 --input /usr/local/flink/LICENSE

，但我遇到了以下错误（总结）：

Exception in thread "main" org.apache.flink.client.program.ProgramInvocationException: Could not start the ActorSystem needed to talk to the JobManager.
Caused by: com.typesafe.config.ConfigException$Missing: No configuration setting found for key 'akka.remote.log-received-messages'

我该如何解决？

Answer 1

尝试了很多设置之后，所有关于maven依赖项的内容都与远程集群上安装的Flink版本不匹配。 Maven依赖项是基于Scala 1.3.2构建的Flink版本2.10，而安装在远程群集上的Flink是基于Scala 1.3.2构建的2.11。只是一个微小的差异，但很重要！

在远程群集上运行WordCount示例时出现Flink错误

1 个答案: