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From Krzysztof Sobkowiak <krzys.sobkow...@gmail.com>
Subject Java 6 support broken in Karaf 3.0.x
Date Wed, 06 Jul 2016 21:20:58 GMT
Hi

According to http://karaf.apache.org/download.html Karaf 3.0.x supports Java 6. I tried to
start it with 1.6.0_45 and got following error while starting the container

java.lang.UnsupportedClassVersionError: org/apache/felix/fileinstall/internal/FileInstall
: Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2279)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1501)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1374)
    at org.apache.felix.framework.Felix.createBundleActivator(Felix.java:4329)
    at org.apache.felix.framework.Felix.activateBundle(Felix.java:2141)
    at org.apache.felix.framework.Felix.startBundle(Felix.java:2064)
    at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1291)
    at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
    at java.lang.Thread.run(Thread.java:662)
[FelixStartLevel] ERROR org.apache.aries.blueprint.container.BlueprintContainerImpl - Unable
to start blueprint container for bundle org.apache.aries.blueprint.cm/1.0.8
java.lang.NoClassDefFoundError: java/lang/AutoCloseable
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2279)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1501)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.aries.blueprint.namespace.NamespaceHandlerRegistryImpl$NamespaceHandlerSetImpl.createSchema(NamespaceHandlerRegistryImpl.java:603)
    at org.apache.aries.blueprint.namespace.NamespaceHandlerRegistryImpl$NamespaceHandlerSetImpl.doGetSchema(NamespaceHandlerRegistryImpl.java:458)
    at org.apache.aries.blueprint.namespace.NamespaceHandlerRegistryImpl$NamespaceHandlerSetImpl.getSchema(NamespaceHandlerRegistryImpl.java:443)
    at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:343)
    at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:276)
    at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:300)
    at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:269)
    at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:265)
    at org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:255)
    at org.apache.aries.blueprint.container.BlueprintExtender.addingBundle(BlueprintExtender.java:218)
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerAdding(BundleHookBundleTracker.java:487)
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerAdding(BundleHookBundleTracker.java:433)
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.trackAdding(BundleHookBundleTracker.java:749)
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.trackInitial(BundleHookBundleTracker.java:674)
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker.open(BundleHookBundleTracker.java:159)
    at org.apache.aries.util.tracker.RecursiveBundleTracker.open(RecursiveBundleTracker.java:106)
    at org.apache.aries.blueprint.container.BlueprintExtender$2.serviceFound(BlueprintExtender.java:119)
    at org.apache.aries.util.tracker.SingleServiceTracker.update(SingleServiceTracker.java:174)
    at org.apache.aries.util.tracker.SingleServiceTracker.findMatchingReference(SingleServiceTracker.java:132)
    at org.apache.aries.util.tracker.SingleServiceTracker.open(SingleServiceTracker.java:100)
    at org.apache.aries.blueprint.container.BlueprintExtender.start(BlueprintExtender.java:137)
    at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:645)
    at org.apache.felix.framework.Felix.activateBundle(Felix.java:2146)
    at org.apache.felix.framework.Felix.startBundle(Felix.java:2064)
    at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1291)
    at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
    at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: java.lang.AutoCloseable
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1460)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 35 more

AutoCloseable has been introduced in Java 7.

I'm getting similar problems while starting ServiceMix

 19% [=============>                                                          ]ERROR: Bundle
org.apache.felix.fileinstall [7] Error starting mvn:org.apache.felix/org.apache.felix.fileinstall/3.5.2
(org.osgi.framework.BundleException: Activator start error in bundle org.apache.felix.fileinstall
[7].)
java.lang.UnsupportedClassVersionError: org/apache/felix/fileinstall/internal/FileInstall
: Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)


38% [===========================>                                            ][FelixStartLevel]
ERROR org.apache.aries.blueprint.container.BlueprintContainerImpl - Unable to start blueprint
container for bundle org.apache.karaf.deployer.spring/3.0.6
java.lang.UnsupportedClassVersionError: org/apache/felix/fileinstall/ArtifactUrlTransformer
: Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2279)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1501)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1374)


Caused by: java.lang.ClassNotFoundException: java.util.concurrent.ConcurrentLinkedDeque
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1460)


ConcurrentLinkedDeque introduced in Java 7.

I think Karaf 3.0.x no more supports Java 6 and we should remove this iformation from the
schedule matrix and update the supported target/source in pom.

Kindly regards
Krzysztof

-- 
Krzysztof Sobkowiak (@ksobkowiak)

JEE & OSS Architect, Integration Architect
Apache Software Foundation Member (http://apache.org/)
Apache ServiceMix Committer & PMC Member (http://servicemix.apache.org/)
Senior Solution Architect @ Capgemini SSC (http://www.capgeminisoftware.pl/)

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