Amazon S3 TransferUtility.Upload hangs in C#

Question

So I\'m writing a migration application, to take some data from our local storage and upload it to Amazon. Everything is working fine, except once I get into files that are

Answer 1

Is DisplayFileProgress thread-safe? I believe (looking at some older code) that the callback is called by each upload thread independently.

This code below is part of a small utility that we use to upload files ranging from 5 MB up to 1-2 GB or so. It's not remarkably different than yours, but perhaps it might help.

var writerlock = new object();

using (var tu = new TransferUtility(amazonS3Client, tuconfig))
{
    var turequest = new TransferUtilityUploadRequest()
        .WithBucketName(bucket)
        .WithFilePath(file)
        .WithKey(Path.GetFileName(file))
        .WithStorageClass(S3StorageClass.ReducedRedundancy)
        .WithPartSize(5 * 1024 * 1024)
        .WithAutoCloseStream(true)
        .WithCannedACL(S3CannedACL.PublicRead);

    tuconfig.NumberOfUploadThreads = Environment.ProcessorCount - 1;

    // show progress information if not running batch
    if (interactive)
    {
        turequest.UploadProgressEvent += (s, e) =>
                                          {
                                              lock (writerlock)
                                              {
                                                  ... our progress routine ...
                                              }
                                          };
    }

    tu.Upload(turequest);
}