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Posted to users@felix.apache.org by o haya <oh...@yahoo.com.INVALID> on 2017/10/31 05:16:49 UTC

Getting "Unsupported major.minor version 52.0" when build using Eclipse

Hi,

I am working on a plugin for Oracle Access Manager (OAM), which I believe uses Felix.  

I originally built (compiled and JARed) the plugin using Netbeans 8.02 and got it working, but I was asked to now build this plugin using Eclipse.  

I figured that shouldn't be a problem, but when I built the plugin, it would not "activate" and the logging showed:

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at oracle.security.am.plugin.internal.OSGIPluginService.installAndStartBundle(OSGIPluginService.java:179)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.installAndStartBundle(NodeMessageListener.java:66)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessage(NodeMessageListener.java:112)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessageList(NodeMessageListener.java:49)
        at oracle.security.am.extensibility.lifecycle.messaging.MessageListenerWrapper.objectCreated(MessageListenerWrapper.java:30)
        at oracle.security.am.foundation.mapimpl.coherence.events.MapListenerWrapper.notifyListener(MapListenerWrapper.java:174)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.dispatch(EventDispatcher.java:132)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.run(EventDispatcher.java:114)
Caused By: org.osgi.framework.BundleException: Activator start error in bundle GxOamResponsePlugin [2].
        at org.apache.felix.framework.Felix.activateBundle(Felix.java:2202)
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2070)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:976)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:963)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at oracle.security.am.plugin.internal.OSGIPluginService.installAndStartBundle(OSGIPluginService.java:179)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.installAndStartBundle(NodeMessageListener.java:66)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessage(NodeMessageListener.java:112)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessageList(NodeMessageListener.java:49)
        at oracle.security.am.extensibility.lifecycle.messaging.MessageListenerWrapper.objectCreated(MessageListenerWrapper.java:30)
        at oracle.security.am.foundation.mapimpl.coherence.events.MapListenerWrapper.notifyListener(MapListenerWrapper.java:174)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.dispatch(EventDispatcher.java:132)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.run(EventDispatcher.java:114)
Caused By: java.lang.UnsupportedClassVersionError: oam/plugin/GxOamResponsePlugin : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
        at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2313)
        at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1519)
        at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:77)
        at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1988)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1392)
        at org.apache.felix.framework.Felix.createBundleActivator(Felix.java:4335)
        at org.apache.felix.framework.Felix.activateBundle(Felix.java:2147)
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2070)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:976)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:963)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at oracle.security.am.plugin.internal.OSGIPluginService.installAndStartBundle(OSGIPluginService.java:179)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.installAndStartBundle(NodeMessageListener.java:66)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessage(NodeMessageListener.java:112)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessageList(NodeMessageListener.java:49)
        at oracle.security.am.extensibility.lifecycle.messaging.MessageListenerWrapper.objectCreated(MessageListenerWrapper.java:30)
        at oracle.security.am.foundation.mapimpl.coherence.events.MapListenerWrapper.notifyListener(MapListenerWrapper.java:174)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.dispatch(EventDispatcher.java:132)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.run(EventDispatcher.java:114)

I have tried to set the compatibility in Eclipse to 1.7 and even uninstalled all Java versions and Eclipse and also installed JDK 1.7 and re-installing Eclipse and then rebuilt the plugin, but still get the same error.

Also, I used javap -verbose to check the Java classes that got built and they are all "51" or Java 1.7.  From the logging above it seems like something to do with the classloader.  Is there some parameter I need to use in the MANIFEST.MF or something like that?

Thanks,
Jim

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Re: Getting "Unsupported major.minor version 52.0" when build using Eclipse

Posted by Bernd Eckenfels <ec...@zusammenkunft.net>.

The error means you compiled classes with Java 8, looks like OAM is Java 7 (or older?). This is not really related to Felix or OSGi

Gruss
Bernd
--
http://bernd.eckenfels.net
________________________________
From: o haya <oh...@yahoo.com.INVALID>
Sent: Tuesday, October 31, 2017 6:16:49 AM
To: users@felix.apache.org
Cc: ohaya@yahoo.com
Subject: Getting "Unsupported major.minor version 52.0" when build using Eclipse

Hi,

I am working on a plugin for Oracle Access Manager (OAM), which I believe uses Felix.

I originally built (compiled and JARed) the plugin using Netbeans 8.02 and got it working, but I was asked to now build this plugin using Eclipse.

I figured that shouldn't be a problem, but when I built the plugin, it would not "activate" and the logging showed:

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at oracle.security.am.plugin.internal.OSGIPluginService.installAndStartBundle(OSGIPluginService.java:179)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.installAndStartBundle(NodeMessageListener.java:66)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessage(NodeMessageListener.java:112)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessageList(NodeMessageListener.java:49)
        at oracle.security.am.extensibility.lifecycle.messaging.MessageListenerWrapper.objectCreated(MessageListenerWrapper.java:30)
        at oracle.security.am.foundation.mapimpl.coherence.events.MapListenerWrapper.notifyListener(MapListenerWrapper.java:174)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.dispatch(EventDispatcher.java:132)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.run(EventDispatcher.java:114)
Caused By: org.osgi.framework.BundleException: Activator start error in bundle GxOamResponsePlugin [2].
        at org.apache.felix.framework.Felix.activateBundle(Felix.java:2202)
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2070)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:976)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:963)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at oracle.security.am.plugin.internal.OSGIPluginService.installAndStartBundle(OSGIPluginService.java:179)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.installAndStartBundle(NodeMessageListener.java:66)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessage(NodeMessageListener.java:112)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessageList(NodeMessageListener.java:49)
        at oracle.security.am.extensibility.lifecycle.messaging.MessageListenerWrapper.objectCreated(MessageListenerWrapper.java:30)
        at oracle.security.am.foundation.mapimpl.coherence.events.MapListenerWrapper.notifyListener(MapListenerWrapper.java:174)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.dispatch(EventDispatcher.java:132)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.run(EventDispatcher.java:114)
Caused By: java.lang.UnsupportedClassVersionError: oam/plugin/GxOamResponsePlugin : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
        at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2313)
        at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1519)
        at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:77)
        at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1988)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1392)
        at org.apache.felix.framework.Felix.createBundleActivator(Felix.java:4335)
        at org.apache.felix.framework.Felix.activateBundle(Felix.java:2147)
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2070)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:976)
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:963)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at oracle.security.am.plugin.internal.OSGIPluginService.installAndStartBundle(OSGIPluginService.java:179)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.installAndStartBundle(NodeMessageListener.java:66)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessage(NodeMessageListener.java:112)
        at oracle.security.am.extensibility.lifecycle.messaging.NodeMessageListener.receiveMessageList(NodeMessageListener.java:49)
        at oracle.security.am.extensibility.lifecycle.messaging.MessageListenerWrapper.objectCreated(MessageListenerWrapper.java:30)
        at oracle.security.am.foundation.mapimpl.coherence.events.MapListenerWrapper.notifyListener(MapListenerWrapper.java:174)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.dispatch(EventDispatcher.java:132)
        at oracle.security.am.foundation.mapimpl.coherence.events.EventDispatcher.run(EventDispatcher.java:114)

I have tried to set the compatibility in Eclipse to 1.7 and even uninstalled all Java versions and Eclipse and also installed JDK 1.7 and re-installing Eclipse and then rebuilt the plugin, but still get the same error.

Also, I used javap -verbose to check the Java classes that got built and they are all "51" or Java 1.7.  From the logging above it seems like something to do with the classloader.  Is there some parameter I need to use in the MANIFEST.MF or something like that?

Thanks,
Jim

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