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DllNotFoundException in ASP.NET Core 3.1 Docker container #481

sibbl opened this issue Jan 14, 2020 · 2 comments

DllNotFoundException in ASP.NET Core 3.1 Docker container #481

sibbl opened this issue Jan 14, 2020 · 2 comments


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@sibbl sibbl commented Jan 14, 2020

Describe the bug

I'd like to build a docker container of my ASP.NET Core 3.1 application which uses the Speech SDK.

Unfortunately I get the following exception as soon as SpeechConfig.FromEndpoint(any(Uri), any(string)) is called:

DllNotFoundException: Unable to load shared library 
'' or one of its dependencies.
In order to help diagnose loading problems, consider setting the LD_DEBUG
environment variable:
cannot open shared object file: No such file or directory

I'm building it with the "bionics" base images from Microsoft, which is based on Ubuntu 18.04. As far as I read this should be supported.

I've provided a small test project which can be run as is to reproduce the issue:

To Reproduce
Steps to reproduce the behavior:

  1. Open the project above in Visual Studio (2019, Windows, all updates installed)
  2. Run the "Docker" target
  3. Wait until /helloworld is loaded in your browser or open it yourself

Expected behavior
The string "hello world" should be returned instead of the exception above.

Version of the Cognitive Services Speech SDK
Platform, Operating System, and Programming Language

  • OS: Windows
  • Hardware: x64
  • Programming language: C#
  • Browser doesn't matter

Additional context

  • I'm using Linux containers in Docker v2.1.0.5
  • running cat /etc/os-release inside the Docker container returns Ubuntu 18.04.3 LTS (Bionic Beaver)
  • the runtimes directory including the *.so libs exist in the container

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@Curious425 Curious425 commented Jan 14, 2020

In addition to ensuring the so file is there, have you set your LD_LIBRARY_PATH to include that location.

Also, did you install openssl and libasound packages inside the docker image?


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@sibbl sibbl commented Jan 15, 2020

@Curious425 thanks a lot, that helped me solving it! Indeed these packages were missing in my container. No LD_LIBRARY_PATH was necessary though.

@sibbl sibbl closed this Jan 15, 2020
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