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Home » Newcomers » Newcomers » Eclipse RCP-Plug-in "com.masterdemo" was unable to instantiate class com.master.rcp.Master(org.eclipse.core.runtime.CoreException: Plug-in "com.masterdemo" was unable to instantiate class "com.master.rcp.MasterApplication".)

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Eclipse RCP-Plug-in "com.masterdemo" was unable to instantiate class com.master.rcp.Master [message #1816102]

Mon, 21 October 2019 09:20

Soumali Chatterjee

Messages: 1
Registered: October 2019

Junior Member

Getting following exception while executing plugin, using eclipse rcp:

org.eclipse.core.runtime.CoreException: Plug-in "com.masterdemo" was unable to instantiate class "com.master.rcp.MasterApplication".
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:212)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:206)
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.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:198)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:660)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
at org.eclipse.equinox.launcher.Main.run(Main.java:1468)
at org.eclipse.equinox.launcher.Main.main(Main.java:1441)
Caused by: java.lang.NoClassDefFoundError: com/container/ContainerException
at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3138)
at java.base/java.lang.Class.getConstructor0(Class.java:3343)
at java.base/java.lang.Class.getDeclaredConstructor(Class.java:2554)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:204)
... 16 more
Caused by: java.lang.ClassNotFoundException: com.container.ContainerException cannot be found by com.master.masterdemo_6.0.3
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:514)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:425)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:155)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 21 more

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Re: Eclipse RCP-Plug-in "com.masterdemo" was unable to instantiate class com.master.rcp.Ma [message #1816112 is a reply to message #1816102]

Mon, 21 October 2019 11:59

Ed Merks

Messages: 33147
Registered: July 2009

Senior Member

These are all confusing class names. It impossible to comment without seeing what you've all put in your plugin.xmls and what class names you're all using, but it looks like a mess...

Ed Merks
Professional Support: https://www.macromodeling.com/

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