我正在R 3.4.4上的RStudio Server v.1.1.442中编写一个Shiny应用程序，今天，当我打开ui.R文件进行编辑时，我所做的任何编辑都会遇到弹出错误“ R代码”执行错误”并重复打印
对象[[3]]中的错误：下标超出范围
在我什至不执行任何代码的情况下，进入控制台。代码建议在编辑时完全消失了。
我尝试关闭项目并在一个新项目中分别打开文件，但这并没有改变。我觉得这可能是我在该项目中使用的一个软件包中的一个错误，但是我不知道如何诊断它。任何帮助将不胜感激！
以下是我正在使用的软件包的列表：
shiny, DT, shinyMCE, wordcloud, stringr, ngram, shinyjs, rvest, RCurl, XML, stringi, magrittr, data.table, phrasemachine, urltools, textclean
答案 0 :(得分：0)
它可能与处理using System;
using System.Diagnostics;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Azure.ServiceBus;
using Microsoft.WindowsAzure.ServiceRuntime;
namespace WorkerRoleWithSBQueue1 {
public class WorkerRole : RoleEntryPoint {
private readonly CancellationTokenSource _cancellationTokenSource = new CancellationTokenSource();
private readonly ManualResetEvent _runCompleteEvent = new ManualResetEvent(false);
// The name of your queue
private const string ServiceBusConnectionString = "<your_connection_string>";
private const string TopicName = "test-topic";
private const string SubscriptionName = "test-sub1";
// _client is thread-safe. Recommended that you cache
// rather than recreating it on every request
private SubscriptionClient _client;
public override void Run() {
Trace.WriteLine("Starting processing of messages");
try {
this.RunAsync(this._cancellationTokenSource.Token).Wait();
} catch (Exception e) {
Trace.WriteLine("Exception");
Trace.WriteLine(e.ToString());
} finally {
Trace.WriteLine("Finally...");
this._runCompleteEvent.Set();
}
}
public override bool OnStart() {
// Set the maximum number of concurrent connections
ServicePointManager.DefaultConnectionLimit = 12;
var result = base.OnStart();
Trace.WriteLine("WorkerRole has been started");
return result;
}
public override void OnStop() {
// Close the connection to Service Bus Queue
this._cancellationTokenSource.Cancel();
this._runCompleteEvent.WaitOne();
base.OnStop();
}
private async Task RunAsync(CancellationToken cancellationToken) {
// Configure the client
RegisterOnMessageHandlerAndReceiveMessages(ServiceBusConnectionString, TopicName, SubscriptionName);
_runCompleteEvent.WaitOne();
Trace.WriteLine("Closing");
await _client.CloseAsync();
}
private void RegisterOnMessageHandlerAndReceiveMessages(string connectionString, string topicName, string subscriptionName) {
_client = new SubscriptionClient(connectionString, topicName, subscriptionName);
var messageHandlerOptions = new MessageHandlerOptions(ExceptionReceivedHandler) {
// Maximum number of concurrent calls to the callback ProcessMessagesAsync(), set to 1 for simplicity.
// Set it according to how many messages the application wants to process in parallel.
MaxConcurrentCalls = 1,
// Indicates whether MessagePump should automatically complete the messages after returning from User Callback.
// False below indicates the Complete will be handled by the User Callback as in `ProcessMessagesAsync` below.
AutoComplete = false,
};
_client.RegisterMessageHandler(ProcessMessageAsync, messageHandlerOptions);
}
private async Task ProcessMessageAsync(Message message, CancellationToken token) {
try {
// Process the message
Trace.WriteLine($"Received message: SequenceNumber:{message.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(message.Body)}");
await _client.CompleteAsync(message.SystemProperties.LockToken);
} catch (Exception e) {
// Handle any message processing specific exceptions here
Trace.Write(e.ToString());
await _client.AbandonAsync(message.SystemProperties.LockToken);
}
}
private static Task ExceptionReceivedHandler(ExceptionReceivedEventArgs exceptionReceivedEventArgs) {
Console.WriteLine($"Message handler encountered an exception {exceptionReceivedEventArgs.Exception}.");
var context = exceptionReceivedEventArgs.ExceptionReceivedContext;
Console.WriteLine("Exception context for troubleshooting:");
Console.WriteLine($"- Endpoint: {context.Endpoint}");
Console.WriteLine($"- Entity Path: {context.EntityPath}");
Console.WriteLine($"- Executing Action: {context.Action}");
return Task.CompletedTask;
}
}
}
/ magrittr库的管道运算符dplyr的RStudio代码自动完成细节有关，尤其是当它嵌套或涉及连接时。它可能会产生这种错误，但是它也取决于Windows版本。尝试用管道代替直接调用函数。