On Thu, Jul 11, 2019 at 9:18 AM Rainer Jung <rainer.j...@kippdata.de> wrote:
> Hi Rémy,
>
> for which Java version and distribution is this? The docs for Java 7 and
> 8 are much less precise about return codes than the cited docs for Java
> 9. So older versions might give a generic error. The used code for
> checking versions is in the HotSpot sources for version 8 inside
> hotspot/src/share/vm/runtime/thread.cpp (functions
> Threads::is_supported_jni_version_including_1_1 and
> Threads::is_supported_jni_version):
>
> jboolean Threads::is_supported_jni_version_including_1_1(jint version) {
> if (version == JNI_VERSION_1_1) return JNI_TRUE;
> return is_supported_jni_version(version);
> }
>
> It is called from hotspot/src/share/vm/prims/jni.cpp in jni_GetEnv().
>
> I don't see a code path returning -1 in the version I am looking at
> (outdated Java 8 source code).
>
> What is rather special about that environment w.r.t. platform/JVM/Arch
> or so?
>
The environment is a Graal native image, built on the same machine.
https://github.com/oracle/graal/blob/master/substratevm/src/com.oracle.svm.jni/src/com/oracle/svm/jni/JNILibraryLoadFeature.java#L87
So the OnLoad of tomcat-native seems to be invoked successfully, but
returns -1 signifying an error. I have no idea what the error really is.
Overall, I'm having TLS problems: the SunEC library (non) packaging is a
problem, there's no ALPN with JSSE, and tomcat-native doesn't work.
However, the rest works as I expected.
Rémy
>
> Regards,
>
> Rainer
>
> Am 10.07.2019 um 20:42 schrieb Rémy Maucherat:
> > Hi,
> >
> > I'm a bit stumped there, as I'm trying to get native to work in that
> > rather special environment.
> >
> > JNI_OnLoad fails with:
> > WARNING: The APR based Apache Tomcat Native library failed to load. The
> > error reported was [Unsupported JNI version 0xffffffff, required by
> > bin/libtcnative-1.so.0.2.23]
> > java.lang.UnsatisfiedLinkError: Unsupported JNI version 0xffffffff,
> > required by bin/libtcnative-1.so.0.2.23
> > at
> >
> com.oracle.svm.jni.JNILibraryInitializer.initialize(JNILibraryLoadFeature.java:87)
> > at
> >
> com.oracle.svm.core.jdk.NativeLibrarySupport.loadLibrary0(NativeLibrarySupport.java:153)
> > at
> >
> com.oracle.svm.core.jdk.NativeLibrarySupport.loadLibrary(NativeLibrarySupport.java:98)
> > at
> java.lang.ClassLoader.loadLibrary(Target_java_lang_ClassLoader.java:126)
> > at java.lang.Runtime.load0(Runtime.java:809)
> > at java.lang.Runtime.load(Runtime.java:241)
> > at java.lang.System.load(System.java:366)
> > at org.apache.tomcat.jni.Library.<init>(Library.java:42)
> >
> > Although this looks weird, this is actually returning -1 and it's normal
> > when it fails [it's a bad error message]. Most likely this doesn't work:
> > if ((*vm)->GetEnv(vm, &ppe, JNI_VERSION_1_4)) {
> > return JNI_ERR;
> > }
> >
> > Any ideas ?
> >
> > Rémy
>
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