Upload blob failed each time after 15 minutes

Which service(blob, file) does this issue concern?

blob

Which version of the SDK was used?

0.12.0

On which platform were you using? (.Net Framework version or .Net Core version, and OS version)

.Net Core

How can the problem be reproduced? It’d be better if the code caused the problem can be shared.

What problem was encountered?

If I have a slow connection upload blob failed each time after 15 minutes with message: One or more errors occurred. (The transfer failed.)

With normal connection the upload works fine. This is my code:

CloudBlockBlob blockBlob = new CloudBlockBlob(new Uri(sConnString));
ServicePointManager.Expect100Continue = false;
TransferManager.Configurations.ParallelOperations = 10;
...
var task = TransferManager.UploadAsync(pathFile, blockBlob, null, context, CancellationToken.None);                
task.Wait();

How can I solve it?

Have you found a mitigation/solution?

No

[epi82]

It seems works. I’ve tried with a function like this:

private int GetParallelOperations(double transfertSpeed)
        {
            int retval = 0;
            switch (transfertSpeed)
            {
                case double n when (n >= 1):
                    retval = Environment.ProcessorCount * 8;
                    break;
                case double n when (n < 1 && n>=0.1):
                    retval = 10;
                    break;                
                default:
                    retval = 2;
                    break;
            }

            return retval;
        }

and then used:

TransferManager.Configurations.ParallelOperations = GetParallelOperations(Utilities.TransferSpeed);

where transfer speed is stimated with a simple file with size 5MB. For speed test I left “ParallelOperations” set to “Environment.ProcessorCount * 8” (works also in case of slow connection).

[santhoshhere]

It seems works. I’ve tried with a function like this:

private int GetParallelOperations(double transfertSpeed)
        {
            int retval = 0;
            switch (transfertSpeed)
            {
                case double n when (n >= 1):
                    retval = Environment.ProcessorCount * 8;
                    break;
                case double n when (n < 1 && n>=0.1):
                    retval = 10;
                    break;                
                default:
                    retval = 2;
                    break;
            }

            return retval;
        }

and then used:

TransferManager.Configurations.ParallelOperations = GetParallelOperations(Utilities.TransferSpeed);

where transfer speed is stimated with a simple file with size 5MB. For speed test I left “ParallelOperations” set to “Environment.ProcessorCount * 8” (works also in case of slow connection).

What is the unit of measure for transferspeed? kbps or mbps and what’s the calculation on the switch case? please explain