Hi,
If multiple versions of com.sun.jna and com.sun.jna.platform end up in the same
Eclipse installation, this can result in errors like the following, which we
have seen recently:
java.lang.LinkageError: loader constraint violation: when resolving interface
method 'boolean
com.sun.jna.platform.win32.Kernel32.ReadFile(com.sun.jna.platform.win32.WinNT$HANDLE,
byte[], int, com.sun.jna.ptr.IntByReference,
com.sun.jna.platform.win32.WinBase$OVERLAPPED)' the class loader
org.eclipse.osgi.internal.loader.EquinoxClassLoader @216be7ba of the current
class, com/sap/adt/sapgui/ui/internal/win32/embedding/PipeHelper, and the class
loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @1885dc2b for the
method's defining class, com/sun/jna/platform/win32/Kernel32, have different
Class objects for the type com/sun/jna/ptr/IntByReference used in the signature
(com.sap.adt.sapgui.ui.internal.win32.embedding.PipeHelper is in unnamed module
of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @216be7ba, parent
loader 'platform'; com.sun.jna.platform.win32.Kernel32 is in unnamed module of
loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @1885dc2b, parent
loader 'platform')
at
com.sap.adt.sapgui.ui.internal.win32.embedding.PipeHelper.readNamedPipe(PipeHelper.java:119)
at
com.sap.adt.sapgui.ui.internal.win32.embedding.WinGuiServerProxy$2.run(WinGuiServerProxy.java:133)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
This specific IDE contained
com.sun.jna (5.8.0) [jna] -- reference:file:plugins/com.sun.jna_5.8.0.jar --
ACTIVE
com.sun.jna.platform (5.8.0) [jna-platform] --
reference:file:plugins/com.sun.jna.platform_5.8.0.jar - RESOLVED
com.sun.jna (5.8.0.v20210503-0343) [Java Native Access] --
reference:file:plugins/com.sun.jna_5.8.0.v20210503-0343.jar -- ACTIVE
com.sun.jna.platform (5.8.0.v20210406-1004) [Java Native Access Platform] --
reference:file:plugins/com.sun.jna.platform_5.8.0.v20210406-1004.jar - RESOLVED
5.8.0 is the official maven central version consumed via Tycho target directly
from maven and which is currently part of SimRel 2022-09/12:
https://download.eclipse.org/releases/2022-09/202209141001/plugins/
5.8.0.v20210503-0343 is an Eclipse Orbit bundle, part of older SimRels:
https://download.eclipse.org/releases/2021-12/202112081000/plugins/
The official one appears to be missing proper uses constraints in the OSGi
metadata, which I suspect can lead to this kind of issue. I have opened a bug:
https://github.com/java-native-access/jna/issues/1487
eclipse.exe -clean
was able to resolve this problem in the bug reports we have received.
Is there something we do in SimRel to prevent this from running into this
situation in upgrade scenarios in the first place (other than waiting for the
metadata in JNA to be corrected and consume the newer version)?
Best regards,
Sebastian
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