Re: Duplicate class definition

Hi,

This looks like an IKVM bug. I think there is a race condition in the class loader for this specific scenario (dynamically loading a class that ikvmc was unable to compile statically).

I'll fix this, but in the mean time you can try to restructure your ikvmc compilation to make the class compile statically, or add some code to force the class to be loaded predictably.

Thanks for reporting this.

Regards,
Jeroen
________________________________________
From: Yves Langisch <[email protected]>
Sent: Friday, November 13, 2015 3:20 PM
To: ikvm-developers
Subject: [Ikvm-developers] Duplicate class definition

Hi there,

Sometimes during authentication in my application I get the following exception:

Caused by: java.util.concurrent.ExecutionException: java.lang.LinkageError: duplicate class definition: com.jcraft.jsch.agentproxy.connector.PageantConnector$User32
        at java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.util.concurrent.FutureTask.get(FutureTask.java:192)
        ...
Caused by: java.lang.LinkageError: duplicate class definition: com.jcraft.jsch.agentproxy.connector.PageantConnector$User32
        at Java_java_lang_ClassLoader.defineClass1(Unknown Source)
        at IKVM.Internal.AssemblyClassLoader.DefineDynamic(Unknown Source)
        at IKVM.Internal.AssemblyClassLoader.LoadDynamic(Unknown Source)
        at IKVM.Internal.AssemblyClassLoader.LoadClassImpl(Unknown Source)
        at IKVM.Internal.ClassLoaderWrapper.LoadClass(Unknown Source)
        at IKVM.Runtime.ByteCodeHelper.LoadTypeWrapper(Unknown Source)
        at IKVM.Runtime.ByteCodeHelper.DynamicLoadMethodHandleImpl(Unknown Source)
        at IKVM.Runtime.ByteCodeHelper.DynamicBinderMemberLookup(Unknown Source)
        at com.jcraft.jsch.agentproxy.connector.PageantConnector.<init>(PageantConnector.java:57)
        …

Background:

* two relevant DLLs (app.dll, core.ll)
* core.dll is an IKVM converted library containing many 3rd party Java jars
* app.dll is converted with /reference:core.dll and contains most of the jars in core.dll already (and some more) -> conversion leads to duplicate class warnings

As far as I can see there are no duplicate classes in both DLLs. Referring to the stack trace, PageantConnector is in core.dll, the User32 interface in app.dll, if this makes any difference.

Any ideas? Thanks!

-
Yves

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