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Bug 547443

Summary:	Plug-in oracle.eclipse.tools.webtier.ui was unable to load class oracle.eclipse.tools.webtier.ui.internal.WebtierUIStartup.
Product:	[Eclipse Project] JDT	Reporter:	Moise Ndala <moise.ndala>
Component:	UI	Assignee:	Stephan Herrmann <stephan.herrmann>
Status:	CLOSED NOT_ECLIPSE	QA Contact:
Severity:	major
Priority:	P3	CC:	stephan.herrmann
Version:	4.12
Target Milestone:	4.12 M3
Hardware:	PC
OS:	Windows 10
Whiteboard:

Description Moise Ndala

2019-05-17 18:17:22 EDT

Hi,
I have installed Eclipse Oxygen to build and run an J2EE application.
However I constantly have this issue showing in the Error section: Plug-in oracle.eclipse.tools.webtier.ui was unable to load class oracle.eclipse.tools.webtier.ui.internal.WebtierUIStartup.

The pug-in is: org.eclipse.equinox.registry

Please let me know what I should do in the next step.

Here is the full error stack trace:

eclipse.buildId=4.11.0.I20190307-0500
java.version=1.8.0_212
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_CA
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product

org.eclipse.equinox.registry
Error
Fri May 17 14:53:06 MDT 2019
Plug-in oracle.eclipse.tools.webtier.ui was unable to load class oracle.eclipse.tools.webtier.ui.internal.WebtierUIStartup.

java.lang.ClassNotFoundException: An error occurred while automatically activating bundle oracle.eclipse.tools.webtier.ui (1163).
	at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:126)
	at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:331)
	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:473)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:414)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:153)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:612)
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:196)
	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:934)
	at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:246)
	at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:63)
	at org.eclipse.ui.internal.WorkbenchPlugin.lambda$0(WorkbenchPlugin.java:291)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:55)
	at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:288)
	at org.eclipse.ui.internal.EarlyStartupRunnable.run(EarlyStartupRunnable.java:56)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.Workbench$39.run(Workbench.java:2707)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.osgi.framework.BundleException: Error starting module.
	at org.eclipse.osgi.container.Module.doStart(Module.java:598)
	at org.eclipse.osgi.container.Module.start(Module.java:457)
	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:471)
	at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117)
	... 20 more
Caused by: java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/corext/template/java/CodeTemplateContextType
	at java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
	at java.lang.Class.getConstructor0(Class.java:3075)
	at java.lang.Class.getConstructor(Class.java:1825)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.loadBundleActivator(BundleContextImpl.java:799)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:752)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1005)
	at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:357)
	at org.eclipse.osgi.container.Module.doStart(Module.java:589)
	... 23 more
Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.internal.corext.template.java.CodeTemplateContextType cannot be found by oracle.eclipse.tools.webtier.ui_17.3.0.201903121357
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:511)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:414)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:153)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 32 more

Comment 1 Stephan Herrmann

2019-05-18 13:17:38 EDT

The bugreport tells me: you have installed a plug-in oracle.eclipse.tools.webtier.ui, which tries to illegally access an internal class from JDT, without ensuring version compatibility. Class CodeTemplateContextType was moved from org.eclipse.jdt.ui to org.eclipse.jdt.core.manipulation.

Either update the oracle plug-in to a compatible version or report this as a bug to them (that plug-in is not maintained at eclipse.org).