并行斑点上传抛404错误的请求间歇 [英] Parallel Blob Upload throwing 404 Bad Request intermittently

问题描述

我有一个非常简单的服务，

I have a very simple service,

public class AzureService : IAzureService
{
    private readonly CloudBlobContainer _container;
    public AzureService(ISettings settings)
    {
        var storageAccount = CloudStorageAccount.Parse(settings.BlobConnectionString);            
        var blobClient = storageAccount.CreateCloudBlobClient();
        _container = blobClient.GetContainerReference(settings.BlobContainerName);
    }

    public Task UploadBlobAsync(string fileName, Stream stream)
    {
        var blob = _container.GetBlockBlobReference(fileName);
        return blob.UploadFromStreamAsync(stream);
    }

    public Task DeleteBlobAsync(string fileName)
    {
        var blob = _container.GetBlockBlobReference(fileName);
        return blob.DeleteAsync();
    }
}

这个方法是从所谓的，

    public Task SaveAllAsync(Dictionary<string, Stream> images)
    {
        var tasks = new List<Task>();
        foreach (var image in images)
        {
            var fileName = image.Key;
            var stream = image.Value;
            var task = _azureService.UploadBlobAsync(fileName, stream);
            tasks.Add(task);
        }
        return Task.WhenAll(tasks);
    }

我流是<一个href=\"http://msdn.microsoft.com/en-us/library/system.web.httppostedfilebase.inputstream%28v=vs.110%29.aspx\">HttpPostedFileBase.InputStream.有时工作，有时我得到远程服务器返回错误：（400）错误的请求。如果我把一个破发点时，它的工作原理也是如此。

My stream is HttpPostedFileBase.InputStream. Sometimes it works and sometimes I get The remote server returned an error: (400) Bad Request.. If I put a break-point it works as well.

推荐答案

我有同样的问题，我想在1罢工上传20 +图像，单线程的作品，使用等待任务多线程。 WhenAll 失败，远程服务器返回错误：（400）错误的请求

I had the same problem , I tried to upload 20 + images in 1 strike , single threaded works , multi threaded using await Task.WhenAll failed with "The remote server returned an error: (400) Bad Request."

• 看 RequestInformation 在 Microsoft.WindowsAzure.Storage.StorageException 这是从上传抛出[XXX]异步方法更详细的信息。
  
  

• see RequestInformation inside Microsoft.WindowsAzure.Storage.StorageException which is thrown from Upload[xxx]Async methods for more detailed information.
  

首先， RequestInformation 说了一些关于一个MD5问题Md5Mismatch的错误code，买我的直觉，否则表示，由于单个线程的工作方式类似魅力，然后..我发现... DefaultRequestOptions.ParallelOperationThreadCount 在 CloudBlobClient 对象和问题sovled。

At first , RequestInformation said something about a MD5 problem with error code of "Md5Mismatch" , buy my intuition said otherwise because single thread works like a charm , and then .. I found it... DefaultRequestOptions.ParallelOperationThreadCount on CloudBlobClient object and problem sovled.

<一个href=\"http://msdn.microsoft.com/en-us/library/microsoft.windowsazure.storage.blob.blobrequestoptions_members.aspx\"相对=nofollow> BlobRequestOptions成员MSDN

    private CloudBlobContainer ConnectToImageContainer()
    {
        var credentials = new StorageCredentials(AccountName, ImagesContainerKey);
        var account = new CloudStorageAccount(credentials, useHttps: true);
        var client = account.CreateCloudBlobClient();
        client.DefaultRequestOptions.ParallelOperationThreadCount = 64; // max value
        client.DefaultRequestOptions.SingleBlobUploadThresholdInBytes = 67108864; // max value
        var container = client.GetContainerReference(ImagesContainerName);
        return container;
    }

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