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

时间:2015-03-29 18:05:26

标签: java hadoop docker

我有一个伪分布式hadoop集群,作为docker容器运行

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

此处的配置为:https://github.com/sequenceiq/docker-hadoop-ubuntu/

我可以成功处理hdfs,访问ui,但坚持提交java工作,我得到了

  

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

以下是示例代码:

  @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();
    });
  }

这是AccessUtils.execAsRootUnsafe - 围绕UserGroupInformation,它可以正常使用hdfs。

我哪里错了?

upd :我意识到,它应该因为hadoop使用java 7而失败,但是我的java 8,并计划稍后检查。但我预计在这种情况下会有另一条失败消息...... upd2 切换到java7并没有什么不同。

1 个答案:

答案 0 :(得分:0)

我的错误,我正在运行脚本而不将其打包到jar(来自IDE),因此方法getJarByClas()没有意义。