.NET 8, Docker, Linux SkiaSharp Failing

Aspose.Words Product Family
1

I have been trying to resolve the follownig error while running within a Docker Container and Linux.

Unhandled exception. System.TypeInitializationException: The type initializer for 'SkiaSharp.SKObject' threw an exception.

[340](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:341)tests-1 | ---> System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable:

[341](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:342)tests-1 | libfontconfig.so.1: cannot open shared object file: No such file or directory

[342](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:343)tests-1 | /usr/share/dotnet/shared/Microsoft.NETCore.App/8.0.2/libSkiaSharp.so: cannot open shared object file: No such file or directory

[343](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:344)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/libSkiaSharp.so: cannot open shared object file: No such file or directory

[344](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:345)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/runtimes/linux-x64/native/liblibSkiaSharp.so: cannot open shared object file: No such file or directory

[345](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:346)tests-1 | /usr/share/dotnet/shared/Microsoft.NETCore.App/8.0.2/liblibSkiaSharp.so: cannot open shared object file: No such file or directory

[346](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:347)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/liblibSkiaSharp.so: cannot open shared object file: No such file or directory

[347](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:348)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/runtimes/linux-x64/native/libSkiaSharp: cannot open shared object file: No such file or directory

[348](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:349)tests-1 | /usr/share/dotnet/shared/Microsoft.NETCore.App/8.0.2/libSkiaSharp: cannot open shared object file: No such file or directory

[349](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:350)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/libSkiaSharp: cannot open shared object file: No such file or directory

[350](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:351)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/runtimes/linux-x64/native/liblibSkiaSharp: cannot open shared object file: No such file or directory

[351](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:352)tests-1 | /usr/share/dotnet/shared/Microsoft.NETCore.App/8.0.2/liblibSkiaSharp: cannot open shared object file: No such file or directory

[352](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:353)tests-1 | /sln/tests/BizCover.Integration.Service.DocumentGeneration.IntegrationTests/bin/Release/net8.0/liblibSkiaSharp: cannot open shared object file: No such file or directory

[353](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:354)tests-1 | at SkiaSharp.SkiaApi.sk_version_get_milestone()

[354](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:355)tests-1 | at SkiaSharp.SkiaSharpVersion.get_Native()

[355](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:356)tests-1 | at SkiaSharp.SkiaSharpVersion.CheckNativeLibraryCompatible(Boolean throwIfIncompatible)

[356](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:357)tests-1 | at SkiaSharp.SKObject..cctor()

[357](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:358)tests-1 | --- End of inner exception stack trace ---

[358](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:359)tests-1 | at SkiaSharp.SKObject.DeregisterHandle(IntPtr handle, SKObject instance)

[359](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:360)tests-1 | at SkiaSharp.SKObject.set_Handle(IntPtr value)

[360](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:361)tests-1 | at SkiaSharp.SKNativeObject.Dispose(Boolean disposing)

[361](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:362)tests-1 | at SkiaSharp.SKObject.Dispose(Boolean disposing)

[362](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:363)tests-1 | at SkiaSharp.SKBitmap.Dispose(Boolean disposing)

[363](https://github.com/BizCover/BizCover.Integration.Service.DocumentGeneration/actions/runs/8148326971/job/22270923180#step:9:364)tests-1 | at SkiaSharp.SKNativeObject.Finalize()

I have many different fixes without much luck, I have tried using SkiaSharp.NativeAssets.Linux (V2.88.7) and still no luck.

# Arguments

ARG BUILD_VERSION="1.0.0"

# Base

FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base

RUN apt-get clean

#RUN sed -i'.bak' 's/$/ contrib/' /etc/apt/sources.list.d/debian.sources

RUN apt-get update;

RUN apt-get update; apt-get install -y fontconfig fonts-liberation

RUN apt install fonts-open-sans

COPY .../Fonts/*.* ./usr/share/fonts/truetype/

RUN fc-cache -f -v

WORKDIR /app

EXPOSE 80

EXPOSE 443

# Build

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build

WORKDIR /sln
RUN for file in $(ls *.csproj); do mkdir -p ./src/${file%.*}/ && mv $file ./src/${file%.*}/; done

COPY tests/*/*.csproj ./

RUN for file in $(ls *.csproj); do mkdir -p ./tests/${file%.*}/ && mv $file ./tests/${file%.*}/; done

RUN dotnet restore

COPY . .

RUN dotnet build --no-restore -c Release

# Test

FROM build AS tests

# Publish

FROM build AS publish

WORKDIR /sln/src/...

RUN dotnet publish --no-build -c Release -o /artifacts/server

# Run

FROM base AS final

WORKDIR /app

RUN apt-get update

RUN apt-get install -y libgdiplus

COPY --from=publish /artifacts/server .

Current version of Aspose.Words is 23.8.0

2

@pphillipsbiz You are right, usually such problems occurs because Aspose.Words for .NET Standard and .NET6 uses SkiaSharp to deal with graphics, to make it work on Linux you have to add reference either to SkiaSharp.NativeAssets.Linux or to SkiaSharp.NativeAssets.Linux.NoDependencies

If you add reference to SkiaSharp.NativeAssets.Linux, you should also install libfontconfig1 in your system. SkiaSharp.NativeAssets.Linux depends on this library. You can use the following command to install it:

apt-get update && apt-get install -y libfontconfig1

If you do not have rights to install packages, or other reasons not to install libfontconfig1, you can simply use SkiaSharp.NativeAssets.Linux.NoDependencies, which does not require installation of libfontconfig1.

Could you please share your .csproj file here for our reference or create a simple application that will allow us to reproduce the problem? We will check it on our side and provide you more information. Also, please make sure libSkiaSharp.so is deployed to your docker container.