这实际上是解决这个问题的正确方法。前面的答案可能会导致错误的执行！！！
@因为我无法把它放在评论中；）已针对2.2.0和2.3.0进行验证
为appmaster设置资源的驱动程序：

ApplicationSubmissionContext appContext = app.getApplicationSubmissionContext();
ApplicationId appId = appContext.getApplicationId();
appContext.setApplicationName(this.appName);

// Set up the container launch context for the application master
ContainerLaunchContext amContainer = Records.newRecord(ContainerLaunchContext.class);

Resource capability = Records.newRecord(Resource.class);
capability.setMemory(amMemory);        
appContext.setResource(capability);

appContext.setAMContainerSpec(amContainer);

Priority pri = Records.newRecord(Priority.class);
pri.setPriority(amPriority);
appContext.setPriority(pri);

appContext.setQueue(amQueue);

// Submit the application to the applications manager
yarnClient.submitApplication(appContext); // this.yarnClient = YarnClient.createYarnClient();

在applicationmaster中，这是您应该如何为容器（worker）指定资源的。

private AMRMClient.ContainerRequest setupContainerAskForRM() {
        // setup requirements for hosts
        // using * as any host will do for the distributed shell app
        // set the priority for the request
        Priority pri = Records.newRecord(Priority.class);
        pri.setPriority(requestPriority);

        // Set up resource type requirements
        // For now, only memory is supported so we set memory requirements
        Resource capability = Records.newRecord(Resource.class);
        capability.setMemory(containerMemory);

        AMRMClient.ContainerRequest request = new AMRMClient.ContainerRequest(capability, null, null,
                pri);
        return request;
    }

appmaster中的一些run（）或main（）方法

AMRMClientAsync.CallbackHandler allocListener = new RMCallbackHandler();
resourceManager = AMRMClientAsync.createAMRMClientAsync(1000, allocListener);
resourceManager.init(conf);
resourceManager.start();

for (int i = 0; i < numTotalContainers; ++i) {
  AMRMClient.ContainerRequest containerAsk = setupContainerAskForRM();
  resourceManager.addContainerRequest(containerAsk); // 
}

启动容器您可以使用原始的答案解决方案（javacmd），但它只是一个樱桃在上面。不管怎样都应该管用。

您可以通过命令设置applicationmaster可用的内存。像这样的：

// Set the necessary command to execute the application master
Vector<CharSequence> vargs = new Vector<CharSequence>(30);
...
vargs.add("-Xmx" + amMemory + "m"); // notice "m" indicating megabytes, you can use also -Xms combined with -Xmx
... // transform vargs to String commands
amContainer.setCommands(commands);

这应该能解决你的问题。至于这三个问题。Yarn是快速发展的软件。我的建议是忘记文档，获取源代码并阅读它。这将回答你的许多问题。