MSBuild Hanging When Downgrading OpenNPL to Java 8 Using JvmDowngrader

[Foorcee]

I would like to use OpenNPL in .NET Core. Since OpenNPL 2.0, Java 11 is used, but newer Java versions aren't currently supported by IKVM. My idea was to downgrade OpenNPL to Java 8 (ClassVersion 52) using JvmDowngrader, and this seemed to work. I downloaded the latest binary release of OpenNPL, downgraded it to Java 8, and generated the necessary IkvmReference targets for all the JARs.

Now I'm running into a problem: during the build, the MSBuild process just hangs without any real output. Is there any way to debug further, perhaps to identify if a particular JAR is not being converted to DLL, or to understand why the MSBuild process is getting stuck?

I am using IKVK 8.10.2.

<IkvmReference Include="..\apache-opennlp\libs\grizzly-framework-4.0.2.jar">
     <Aliases>grizzly-framework-4.0.2</Aliases>
     <AssemblyVersion>4.0.2</AssemblyVersion>
     <AssemblyFileVersion>4.0.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\grizzly-http-4.0.2.jar">
     <Aliases>grizzly-http-4.0.2</Aliases>
     <AssemblyVersion>4.0.2</AssemblyVersion>
     <AssemblyFileVersion>4.0.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\grizzly-http-server-4.0.2.jar">
     <Aliases>grizzly-http-server-4.0.2</Aliases>
     <AssemblyVersion>4.0.2</AssemblyVersion>
     <AssemblyFileVersion>4.0.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\hppc-0.7.2.jar">
     <Aliases>hppc-0.7.2</Aliases>
     <AssemblyVersion>0.7.2</AssemblyVersion>
     <AssemblyFileVersion>0.7.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jackson-annotations-2.17.2.jar">
     <Aliases>jackson-annotations-2.17.2</Aliases>
     <AssemblyVersion>2.17.2</AssemblyVersion>
     <AssemblyFileVersion>2.17.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jackson-core-2.17.2.jar">
     <Aliases>jackson-core-2.17.2</Aliases>
     <AssemblyVersion>2.17.2</AssemblyVersion>
     <AssemblyFileVersion>2.17.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jackson-databind-2.17.2.jar">
     <Aliases>jackson-databind-2.17.2</Aliases>
     <AssemblyVersion>2.17.2</AssemblyVersion>
     <AssemblyFileVersion>2.17.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jackson-module-jakarta-xmlbind-annotations-2.17.0.jar">
     <Aliases>jackson-module-jakarta-xmlbind-annotations-2.17.0</Aliases>
     <AssemblyVersion>2.17.0</AssemblyVersion>
     <AssemblyFileVersion>2.17.0</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jackson-module-jaxb-annotations-2.17.2.jar">
     <Aliases>jackson-module-jaxb-annotations-2.17.2</Aliases>
     <AssemblyVersion>2.17.2</AssemblyVersion>
     <AssemblyFileVersion>2.17.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jakarta.activation-api-1.2.2.jar">
     <Aliases>jakarta.activation-api-1.2.2</Aliases>
     <AssemblyVersion>1.2.2</AssemblyVersion>
     <AssemblyFileVersion>1.2.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jakarta.annotation-api-2.1.1.jar">
     <Aliases>jakarta.annotation-api-2.1.1</Aliases>
     <AssemblyVersion>2.1.1</AssemblyVersion>
     <AssemblyFileVersion>2.1.1</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jakarta.inject-api-2.0.1.jar">
     <Aliases>jakarta.inject-api-2.0.1</Aliases>
     <AssemblyVersion>2.0.1</AssemblyVersion>
     <AssemblyFileVersion>2.0.1</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jakarta.validation-api-3.0.2.jar">
     <Aliases>jakarta.validation-api-3.0.2</Aliases>
     <AssemblyVersion>3.0.2</AssemblyVersion>
     <AssemblyFileVersion>3.0.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jakarta.ws.rs-api-3.1.0.jar">
     <Aliases>jakarta.ws.rs-api-3.1.0</Aliases>
     <AssemblyVersion>3.1.0</AssemblyVersion>
     <AssemblyFileVersion>3.1.0</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jakarta.xml.bind-api-4.0.2.jar">
     <Aliases>jakarta.xml.bind-api-4.0.2</Aliases>
     <AssemblyVersion>4.0.2</AssemblyVersion>
     <AssemblyFileVersion>4.0.2</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jcommander-1.78.jar">
     <Aliases>jcommander-1.78</Aliases>
     <AssemblyVersion>1.78</AssemblyVersion>
     <AssemblyFileVersion>1.78</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jersey-client-3.1.7.jar">
     <Aliases>jersey-client-3.1.7</Aliases>
     <AssemblyVersion>3.1.7</AssemblyVersion>
     <AssemblyFileVersion>3.1.7</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jersey-common-3.1.7.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jersey-common-3.1.7.jar">
     <Aliases>jersey-common-3.1.7</Aliases>
     <AssemblyVersion>3.1.7</AssemblyVersion>
     <AssemblyFileVersion>3.1.7</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\osgi-resource-locator-1.0.3.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jersey-container-grizzly2-http-3.1.7.jar">
     <Aliases>jersey-container-grizzly2-http-3.1.7</Aliases>
     <AssemblyVersion>3.1.7</AssemblyVersion>
     <AssemblyFileVersion>3.1.7</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jersey-common-3.1.7.jar;..\apache-opennlp\libs\jersey-server-3.1.7.jar</References>     
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jersey-entity-filtering-3.1.7.jar">
     <Aliases>jersey-entity-filtering-3.1.7</Aliases>
     <AssemblyVersion>3.1.7</AssemblyVersion>
     <AssemblyFileVersion>3.1.7</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jersey-common-3.1.7.jar;..\apache-opennlp\libs\jersey-server-3.1.7.jar</References>     
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jersey-media-json-jackson-3.1.7.jar">
     <Aliases>jersey-media-json-jackson-3.1.7</Aliases>
     <AssemblyVersion>3.1.7</AssemblyVersion>
     <AssemblyFileVersion>3.1.7</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jersey-common-3.1.7.jar;..\apache-opennlp\libs\jersey-entity-filtering-3.1.7.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jersey-server-3.1.7.jar">
     <Aliases>jersey-server-3.1.7</Aliases>
     <AssemblyVersion>3.1.7</AssemblyVersion>
     <AssemblyFileVersion>3.1.7</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jersey-client-3.1.7.jar;..\apache-opennlp\libs\jersey-common-3.1.7.jar</References>     
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\jvmdowngrader-api.jar">
     <Aliases>jvmdowngrader-api</Aliases>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <AssemblyFileVersion>1.0.0</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\log4j-api-2.23.1.jar">
     <Aliases>log4j-api-2.23.1</Aliases>
     <AssemblyVersion>2.23.1</AssemblyVersion>
     <AssemblyFileVersion>2.23.1</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\log4j-core-2.23.1.jar">
     <Aliases>log4j-core-2.23.1</Aliases>
     <AssemblyVersion>2.23.1</AssemblyVersion>
     <AssemblyFileVersion>2.23.1</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\log4j-slf4j2-impl-2.23.1.jar">
     <Aliases>log4j-slf4j2-impl-2.23.1</Aliases>
     <AssemblyVersion>2.23.1</AssemblyVersion>
     <AssemblyFileVersion>2.23.1</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\morfologik-fsa-2.1.9.jar">
     <Aliases>morfologik-fsa-2.1.9</Aliases>
     <AssemblyVersion>2.1.9</AssemblyVersion>
     <AssemblyFileVersion>2.1.9</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\morfologik-fsa-builders-2.1.9.jar">
     <Aliases>morfologik-fsa-builders-2.1.9</Aliases>
     <AssemblyVersion>2.1.9</AssemblyVersion>
     <AssemblyFileVersion>2.1.9</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\hppc-0.7.2.jar;..\apache-opennlp\libs\morfologik-fsa-2.1.9.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\morfologik-stemming-2.1.9.jar">
     <Aliases>morfologik-stemming-2.1.9</Aliases>
     <AssemblyVersion>2.1.9</AssemblyVersion>
     <AssemblyFileVersion>2.1.9</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\morfologik-fsa-2.1.9.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\morfologik-tools-2.1.9.jar">
     <Aliases>morfologik-tools-2.1.9</Aliases>
     <AssemblyVersion>2.1.9</AssemblyVersion>
     <AssemblyFileVersion>2.1.9</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jcommander-1.78.jar;..\apache-opennlp\libs\morfologik-fsa-2.1.9.jar;..\apache-opennlp\libs\morfologik-fsa-builders-2.1.9.jar;..\apache-opennlp\libs\morfologik-stemming-2.1.9.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\opennlp-brat-annotator-2.4.0.jar">
     <Aliases>opennlp-brat-annotator-2.4.0</Aliases>
     <AssemblyVersion>2.4.0</AssemblyVersion>
     <AssemblyFileVersion>2.4.0</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\jersey-container-grizzly2-http-3.1.7.jar;..\apache-opennlp\libs\jersey-server-3.1.7.jar;..\apache-opennlp\libs\opennlp-tools-2.4.0.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\opennlp-morfologik-addon-2.4.0.jar">
     <Aliases>opennlp-morfologik-addon-2.4.0</Aliases>
     <AssemblyVersion>2.4.0</AssemblyVersion>
     <AssemblyFileVersion>2.4.0</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\morfologik-stemming-2.1.9.jar;..\apache-opennlp\libs\morfologik-tools-2.1.9.jar;..\apache-opennlp\libs\opennlp-tools-2.4.0.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\opennlp-tools-2.4.0.jar">
     <Aliases>opennlp-tools-2.4.0</Aliases>
     <AssemblyVersion>2.4.0</AssemblyVersion>
     <AssemblyFileVersion>2.4.0</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\opennlp-uima-2.4.0.jar">
     <Aliases>opennlp-uima-2.4.0</Aliases>
     <AssemblyVersion>2.4.0</AssemblyVersion>
     <AssemblyFileVersion>2.4.0</AssemblyFileVersion>
     <References>..\apache-opennlp\libs\opennlp-tools-2.4.0.jar</References>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\osgi-resource-locator-1.0.3.jar">
     <Aliases>osgi-resource-locator-1.0.3</Aliases>
     <AssemblyVersion>1.0.3</AssemblyVersion>
     <AssemblyFileVersion>1.0.3</AssemblyFileVersion>
</IkvmReference>
<IkvmReference Include="..\apache-opennlp\libs\slf4j-api-2.0.13.jar">
     <Aliases>slf4j-api-2.0.13</Aliases>
     <AssemblyVersion>2.0.13</AssemblyVersion>
     <AssemblyFileVersion>2.0.13</AssemblyFileVersion>
</IkvmReference>

[wasabii]

Can you check if any ikvmc processes are running?

[Foorcee]

I couldn't find any ikvmc process running. When I start it via Rider, there’s only a .NET Host process which consistently uses about ~10% CPU. I also tried building the project with dotnet build -v d and have attached the output for reference.

ikvm_build_output.txt

[wasabii]

Any chance of posting the project somewhere? I can't figure anything out with the info provided. No way to reproduce, etc.

[Foorcee]

Sure! I've pushed my code. To test, you can simply run OpenNLP2.Build, and this should generate all the necessary libraries. I've referenced these libraries in the OpenNLP2.NET project. Thank you very much for your support!

https://github.com/Foorcee/OpenNLP2.NET

EDIT: The core logic is based on the repository at https://github.com/sergey-tihon/OpenNLP.NET

[wasabii]

Think I found the issue. Legit bug. Some of the JAR files have pretty large module-info.class files, and there's a bug in the ClassFile reader that is causing it to lock up on them.

[Foorcee]

Thanks for identifying the problem! This makes sense. Is there a workaround or would it require a fix in the ClassFile reader? Could I just delete the module-info.class file? Also, do you happen to remember which JAR it was?