在电子病历上重新启动hiveserver2

Question

我在我的EMR集群中用一个主程序和两个工作人员终止了hiveserver2进程(在找到了ps aux|grep -i hiveserver2 PID之后)。在杀死hiveserver2之前，我能够通过色调浏览和查询浏览器上的Hive。我试着用hive --service hiveserver2重新开始，但是我再也不能从色调连接，它要么挂起，要么说它不能连接到<publicDNS>:10000

我的用例是，我想在不关闭集群的情况下修改EMR集群的单元配置。有可能吗？

Answer 1

initctl list
status hive-server2

sudo restart hive-server2
sudo stop hive-server2
sudo start hive-server2

如何在Amazon中重新启动服务？

Answer 2

可以在启动群集之前添加单元配置，而不是在群集准备就绪之后添加。您可以在引导步骤中将它们作为配置设置添加。

例如，您可以使用以下语法(在java中)将配置添加到hive-site.xml中：

    Map<String,String> hiveProperties = new HashMap<String,String>();
    hiveProperties.put("hive.vectorized.execution.enabled","true");
    hiveProperties.put("hive.vectorized.execution.reduce.enabled","true");
    hiveProperties.put("hive.execution.engine","Tez");
    hiveProperties.put("hive.auto.convert.join","true");
    hiveProperties.put("hive.exec.parallel","true");

    Configuration myHiveConfig = new Configuration()
    .withClassification("hive-site")
    .withProperties(hiveProperties);

    List <Application> apps = new ArrayList<Application>();
    apps.add(new Application().withName("Hadoop"));
    apps.add(new Application().withName("Hive"));
    apps.add(new Application().withName("Spark"));
    //apps.add(new Application().withName("Pig"));
    //apps.add(new Application().withName("Zeppelin-Sandbox"));

    RunJobFlowRequest request = new RunJobFlowRequest()
    .withName("abc")
        .withReleaseLabel(emrVersion) //"emr-4.3.0"
    .withServiceRole("EMR_DefaultRole")
    .withConfigurations(myHiveConfig)
        .withInstances(
                  new JobFlowInstancesConfig()
                        .withInstanceCount(numberofInstances)
                        .withKeepJobFlowAliveWhenNoSteps(true)
                        .withTerminationProtected(false)
                        .withMasterInstanceType(mserverType)
                        .withSlaveInstanceType(sserverType) 
                  )
    .withApplications(apps)
    .withJobFlowRole("EMR_EC2_DefaultRole")
    .withSteps(generalSteps);

以下链接提供更多详细信息：

http://docs.aws.amazon.com/ElasticMapReduce/latest/ReleaseGuide/emr-configure-apps.html