将 yamr 作业提交到远程集群时出现 ClassNotFoundException

ClassNotFoundException when submitting yamr job to remote cluster

我有一个伪分布式 hadoop 集群,运行 作为一个 docker 容器

docker run -d  -p 50070:50070 -p 9000:9000 -p 8032:8032 -p 8088:8088 --name had00p sequenceiq/hadoop-docker:2.6.0 /etc/bootstrap.sh -d

它的配置在这里:https://github.com/sequenceiq/docker-hadoop-ubuntu/

我可以成功处理 hdfs,访问 ui,但无法从 java 提交作业,我得到了

ClassNotFoundException: Class com.github.mikhailerofeev.hadoop.Script$MyMapper not found

示例代码如下:

  @Override
  public Configuration getConf() {
    String host = BOOT_TO_DOCKER_IP;
    int nameNodeHdfsPort = 9000;
    int yarnPort = 8032;
    String yarnAddr = host + ":" + yarnPort;
    String hdfsAddr = "hdfs://" + host + ":" + nameNodeHdfsPort + "/";

    Configuration configutation = new Configuration();
    configutation.set("yarn.resourcemanager.address", yarnAddr);
    configutation.set("mapreduce.framework.name", "yarn");
    configutation.set("fs.default.name", hdfsAddr);
    return configutation;
  }


  private void simpleMr(String inputPath) throws IOException {

    JobConf conf = new JobConf(getConf(), Script.class);
    conf.setJobName("fun");
    conf.setJarByClass(MyMapper.class);
    conf.setMapperClass(MyMapper.class);
    conf.setInputFormat(TextInputFormat.class);
    conf.setOutputFormat(TextOutputFormat.class);

    FileInputFormat.setInputPaths(conf, inputPath);
    String tmpMRreturn = "/user/m-erofeev/map-test.data";
    Path returnPath = new Path(tmpMRreturn);
    FileOutputFormat.setOutputPath(conf, returnPath);

    AccessUtils.execAsRootUnsafe(() -> {
      FileSystem fs = FileSystem.get(getConf());
      if (fs.exists(returnPath)) {
        fs.delete(returnPath, true);
      }
    });
    AccessUtils.execAsRootUnsafe(() -> {
      RunningJob runningJob = JobClient.runJob(conf);
      runningJob.waitForCompletion();
    });
  }

这里是 AccessUtils.execAsRootUnsafe -- 围绕 UserGroupInformation,它与 hdfs 一起工作得很好。

我哪里错了?

upd:我意识到,它应该失败,因为 hadoop 使用 java 7,但我 java 8,并计划稍后检查.但我预计在这种情况下会出现另一个失败消息...... upd2 切换到 java7 没有区别。

我的错误,我是 运行 脚本,没有将它打包到 jar(来自 IDE),所以方法 getJarByClas() 没有意义。