[BUG] Synapse LibraryClient AppendAsync results in 409 conflict instead of 201 created

Describe the bug When trying to upload a synapse workspace library using the following calls, the AppendAsync fails with 409 conflict: LibraryAlreadyExists. However it looks like it is missing the query string comp=appendblock parameter here which if supplied, allows a library to be uploaded directly against REST API (i.e. not via SDK).

Expected behavior Expect 201 Created response.

Actual behavior (include Exception or Stack Trace)

Azure.RequestFailedException: Service request failed.
Status: 409 (Conflict)

Content:
{"code":"LibraryAlreadyExists","message":"The LibraryArtifact my_library-0.0.32-py3-none-any.whl already exists."}

Headers:
Server: Microsoft-HTTPAPI/2.0
Strict-Transport-Security: REDACTED
x-ms-request-id: REDACTED
x-ms-client-request-id: 36fa6ca1-08ec-4124-b90c-de1b71661a1c
Date: Tue, 04 May 2021 14:35:23 GMT
Content-Length: 132
Content-Type: application/json; charset=utf-8

   at Azure.Analytics.Synapse.Artifacts.LibraryRestClient.AppendAsync(String libraryName, Stream content, Nullable`1 xMsBlobConditionAppendpos, CancellationToken cancellationToken)
   at Azure.Analytics.Synapse.Artifacts.LibraryClient.AppendAsync(String libraryName, Stream content, Nullable`1 xMsBlobConditionAppendpos, CancellationToken cancellationToken)

To Reproduce Steps to reproduce the behavior (include a code snippet, screenshot, or any additional information that might help us reproduce the issue)

var uri = new Uri($"https://{workspace}.dev.azuresynapse.net");
var options = new ArtifactsClientOptions() {                                
};

var filename = Path.GetFileName(file);

var cred = new ClientSecretCredential(
    Environment.GetEnvironmentVariable("AZURE_TENANT_ID"),
    Environment.GetEnvironmentVariable("AZURE_CLIENT_ID"),
    Environment.GetEnvironmentVariable("AZURE_CLIENT_SECRET"));

var client = new LibraryClient(uri, cred, options);

var startResponse = await client.StartCreateAsync(filename, cancellationToken);
await startResponse.WaitForCompletionAsync();

using (Stream s = File.OpenRead(file)) {
    var response = await client.AppendAsync(filename, s);
    Console.WriteLine("Append status code is " + response.Status);
}

var flush = await client.StartFlushAsync(filename, cancellationToken);            
var flushWaitResponse = await flush.WaitForCompletionAsync();

Environment:

• Name and version of the Library package used: Azure.Analytics.Synapse.Artifacts 1.0.0-preview.8
• Hosting platform or OS and .NET runtime version (dotnet --info output for .NET Core projects): [e.g. Azure AppService or Windows 10 .NET Framework 4.8]

.NET Core SDK (reflecting any global.json):
Version:   3.1.406
Commit:    f42e6b201a

Runtime Environment:
OS Name:     Windows
OS Version:  10.0.19042
OS Platform: Windows
RID:         win10-x64
Base Path:   C:\Program Files\dotnet\sdk\3.1.406\

Host (useful for support):
 Version: 3.1.12
 Commit:  0267ad09c6

.NET Core SDKs installed:
 2.1.602 [C:\Program Files\dotnet\sdk]
 2.1.700 [C:\Program Files\dotnet\sdk]
 2.1.803 [C:\Program Files\dotnet\sdk]
 3.1.101 [C:\Program Files\dotnet\sdk]
 3.1.406 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
 Microsoft.AspNetCore.All 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
 Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
 Microsoft.AspNetCore.All 2.1.15 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
 Microsoft.AspNetCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
 Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
 Microsoft.AspNetCore.App 2.1.15 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
 Microsoft.AspNetCore.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
 Microsoft.AspNetCore.App 3.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
 Microsoft.NETCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
 Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
 Microsoft.NETCore.App 2.1.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
 Microsoft.NETCore.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
 Microsoft.NETCore.App 3.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
 Microsoft.WindowsDesktop.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
 Microsoft.WindowsDesktop.App 3.1.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

• IDE and version : [e.g. Visual Studio 16.3] n/a

[LittleColin]

Thanks, just updated to Azure.Analytics.Synapse.Artifacts 1.0.0-preview.10 and can confirm the issue is fixed, the following code worked for upload:

using (var s = File.OpenRead(file))
{
    var response = await client.AppendAsync(filename, s);
}

[lmazuel]

Hi @LittleColin , I believe this issue has been fixed by regeneration of the code that happened recently, could you confirm more recent releases of this SDK solve the problem? Thanks!