WithReuse(true) + Docker 4.42.1 causes StartAsync() to hang when container is already running

[tklevgyldendal]

Hi!

I've had some issues with Testcontainers with the latest version of Docker Desktop (4.42.1).

Docker version: 4.42.1, WSL2 backend
Testcontainers version: 4.6.0
Container: MsSqlContainer (but also happening for AzuriteContainer)

Code:

var container = new MsSqlBuilder()
    .WithImage("mcr.microsoft.com/mssql/server:2022-latest")
    .WithReuse(true)
    .Build();

await container.StartAsync(); // This is the part that is timing out when the container is already started.

I've tried using WithLabel as well, but it seems like it correctly detects the reusable resource.
I've also tried deleting all containers. It works when there are no containers or if the container is stopped, but once it's started, reusing it doesn't work.

Things that makes it work again:

• Removing WithReuse.
• Downgrading to Docker Desktop 4.41.2 (Windows)

I also noticed a similar here #1466 with timeout issue, but I'm not sure if this is related.

Any idea on why this is happening? I wanted to wait with creating an issue in case I'm misunderstanding something.

Exception:

Assembly Initialization method <method-path> threw exception. System.TimeoutException: The operation has timed out.. Aborting test execution.
WaitStrategy.WaitUntilAsync(Func`1 wait, TimeSpan interval, TimeSpan timeout, Int32 retries, CancellationToken ct)
DockerContainer.CheckReadinessAsync(IEnumerable`1 waitStrategies, CancellationToken ct)
DockerContainer.UnsafeStartAsync(CancellationToken ct)
DockerContainer.StartAsync(CancellationToken ct)

Logs:

 [testcontainers.org 00:00:00.14] Connected to Docker:
  Host: npipe://./pipe/docker_engine
  Server Version: 28.2.2
  Kernel Version: 6.6.87.2-microsoft-standard-WSL2
  API Version: 1.50
  Operating System: Docker Desktop
  Total Memory: 7.76 GB
  Labels: 
    com.docker.desktop.address=npipe://\\.\pipe\docker_cli
[testcontainers.org 00:00:00.15] Reuse is an experimental feature. For more information, visit: https://dotnet.testcontainers.org/api/resource_reuse/
[testcontainers.org 00:00:00.20] Reusable resource found
[testcontainers.org 00:00:00.27] Start Docker container 99abe6fc916f

[HofmeisterAn]

This is probably related to the following PR (#1465) and appears to be a bug/regression in Docker Desktop. The PR includes an explanation.

There are quite a few issues with Docker Desktop version 4.42.0 and later. I've forwarded the details to the Docker team. They are aware of the issues, and I hope they will address them soon.

BTW the issue also occurs when using the CLI:

docker run -d -p 80 httpd
docker ps
docker start <container_id>
docker ps

☝️ starting it twice breaks the port bindings/mappings.

[tklevgyldendal]

Gotcha, thanks for clarifying! We'll wait for a fix on Docker Desktop's end then.

[bebo-dot-dev]

I just wanted to hop in and say that you're not alone, I ended up downgrading both WSL and Docker Desktop as a workaround to fix what used to work fine.