[jboss-jira] [JBoss JIRA] (DROOLS-4786) Support Java 11 projects
Reguel Wermelinger (Jira)
issues at jboss.org
Wed Nov 20 09:45:00 EST 2019
[ https://issues.jboss.org/browse/DROOLS-4786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Reguel Wermelinger updated DROOLS-4786:
---------------------------------------
Description:
NullPointer occures when using drools with java 11.
The eclipse DRL editor logs warning in 'Debug' perspective since an attempt to install breakpoint support for java 11 natured projects fails. As the integrated ASM libs support up to java 12, it seems like a false positive.
{{java.lang.RuntimeException: value '11' is not a valid language level
at org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:102)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:618)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:587)
at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:492)
at org.drools.eclipse.editors.DroolsLineBreakpointAdapter.canToggleLineBreakpoints(DroolsLineBreakpointAdapter.java:44)
at org.eclipse.debug.internal.ui.actions.breakpoints.RetargetToggleBreakpointAction.canPerformAction(RetargetToggleBreakpointAction.java:46)
at org.eclipse.debug.internal.ui.actions.RetargetAction.isTargetEnabled(RetargetAction.java:223)
at org.eclipse.debug.internal.ui.actions.RetargetAction.partActivated(RetargetAction.java:162)
at org.eclipse.debug.internal.ui.actions.RetargetAction.init(RetargetAction.java:94)
at org.eclipse.debug.internal.ui.actions.breakpoints.RetargetBreakpointAction.init(RetargetBreakpointAction.java:56)
at org.eclipse.ui.internal.WWinPluginAction.initDelegate(WWinPluginAction.java:175)
at org.eclipse.ui.internal.PluginAction.createDelegate(PluginAction.java:121)
at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:255)
at org.eclipse.ui.internal.WWinPluginAction.refreshSelection(WWinPluginAction.java:263)
at org.eclipse.ui.internal.WWinPluginAction.<init>(WWinPluginAction.java:111)
at org.eclipse.ui.internal.ActionDescriptor.createAction(ActionDescriptor.java:259)
at org.eclipse.ui.internal.ActionDescriptor.<init>(ActionDescriptor.java:177)
at org.eclipse.ui.internal.PluginActionSetBuilder.createActionDescriptor(PluginActionSetBuilder.java:130)
at org.eclipse.ui.internal.PluginActionBuilder.readElement(PluginActionBuilder.java:160)
at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:123)
at org.eclipse.ui.internal.registry.RegistryReader.readElementChildren(RegistryReader.java:112)
at org.eclipse.ui.internal.PluginActionBuilder.readElement(PluginActionBuilder.java:143)
at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:123)
at org.eclipse.ui.internal.PluginActionSetBuilder.readActionExtensions(PluginActionSetBuilder.java:248)
at org.eclipse.ui.internal.PluginActionSetBuilder.processActionSets(PluginActionSetBuilder.java:215)
at org.eclipse.ui.internal.ActionPresentation.setActionSets(ActionPresentation.java:190)
at org.eclipse.ui.internal.WorkbenchWindow.updateActionSets(WorkbenchWindow.java:2586)
at org.eclipse.ui.internal.WorkbenchPage.lambda$3(WorkbenchPage.java:2978)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:146)
at org.eclipse.swt.widgets.Display.syncExec_aroundBody16(Display.java:5728)
}}
*Another Exception is thrown when the switching from DRL edit to 'RETE TREE' tab.*
{{java.lang.Exception: Unable to parse rules to show RETE view! 2 parser errors
at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:161)
at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
java.lang.RuntimeException: unknown version 11
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.toNativeVersion(EclipseJavaCompilerSettings.java:101)
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.toNativeSettings(EclipseJavaCompilerSettings.java:112)
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.<init>(EclipseJavaCompilerSettings.java:73)
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:383)
at org.drools.compiler.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49)
at org.drools.compiler.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:420)
at org.drools.compiler.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:61)
at org.drools.compiler.compiler.PackageRegistry.compileAll(PackageRegistry.java:84)
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileAll(KnowledgeBuilderImpl.java:1442)
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.wireAllRules(KnowledgeBuilderImpl.java:925)
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addPackage(KnowledgeBuilderImpl.java:913)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:663)
at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:518)
at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:141)
at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
}}
was:
NullPointer occures when using drools with java 11.
The eclipse DRL editor logs warning in 'Debug' perspective since an attempt to install breakpoint support for java 11 natured projects fails. As the integrated ASM libs support up to java 12, it seems like a false positive.
{{java.lang.RuntimeException: value '11' is not a valid language level
at org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:102)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:618)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:587)
at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:492)
at org.drools.eclipse.editors.DroolsLineBreakpointAdapter.canToggleLineBreakpoints(DroolsLineBreakpointAdapter.java:44)
at org.eclipse.debug.internal.ui.actions.breakpoints.RetargetToggleBreakpointAction.canPerformAction(RetargetToggleBreakpointAction.java:46)
at org.eclipse.debug.internal.ui.actions.RetargetAction.isTargetEnabled(RetargetAction.java:223)
at org.eclipse.debug.internal.ui.actions.RetargetAction.partActivated(RetargetAction.java:162)
at org.eclipse.debug.internal.ui.actions.RetargetAction.init(RetargetAction.java:94)
at org.eclipse.debug.internal.ui.actions.breakpoints.RetargetBreakpointAction.init(RetargetBreakpointAction.java:56)
at org.eclipse.ui.internal.WWinPluginAction.initDelegate(WWinPluginAction.java:175)
at org.eclipse.ui.internal.PluginAction.createDelegate(PluginAction.java:121)
at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:255)
at org.eclipse.ui.internal.WWinPluginAction.refreshSelection(WWinPluginAction.java:263)
at org.eclipse.ui.internal.WWinPluginAction.<init>(WWinPluginAction.java:111)
at org.eclipse.ui.internal.ActionDescriptor.createAction(ActionDescriptor.java:259)
at org.eclipse.ui.internal.ActionDescriptor.<init>(ActionDescriptor.java:177)
at org.eclipse.ui.internal.PluginActionSetBuilder.createActionDescriptor(PluginActionSetBuilder.java:130)
at org.eclipse.ui.internal.PluginActionBuilder.readElement(PluginActionBuilder.java:160)
at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:123)
at org.eclipse.ui.internal.registry.RegistryReader.readElementChildren(RegistryReader.java:112)
at org.eclipse.ui.internal.PluginActionBuilder.readElement(PluginActionBuilder.java:143)
at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:123)
at org.eclipse.ui.internal.PluginActionSetBuilder.readActionExtensions(PluginActionSetBuilder.java:248)
at org.eclipse.ui.internal.PluginActionSetBuilder.processActionSets(PluginActionSetBuilder.java:215)
at org.eclipse.ui.internal.ActionPresentation.setActionSets(ActionPresentation.java:190)
at org.eclipse.ui.internal.WorkbenchWindow.updateActionSets(WorkbenchWindow.java:2586)
at org.eclipse.ui.internal.WorkbenchPage.lambda$3(WorkbenchPage.java:2978)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:146)
at org.eclipse.swt.widgets.Display.syncExec_aroundBody16(Display.java:5728)
at org.eclipse.swt.widgets.Display$AjcClosure17.run(Display.java:1)
at org.eclipse.rcptt.tesla.swt.aspects.DisplayAspect.ajc$around$org_eclipse_rcptt_tesla_swt_aspects_DisplayAspect$9$400dfa49proceed(DisplayAspect.aj:313)
at org.eclipse.rcptt.tesla.swt.aspects.DisplayAspect.ajc$around$org_eclipse_rcptt_tesla_swt_aspects_DisplayAspect$9$400dfa49(DisplayAspect.aj:330)
at org.eclipse.swt.widgets.Display.syncExec_aroundBody18(Display.java:5718)
at org.eclipse.swt.widgets.Display$AjcClosure19.run(Display.java:1)
at org.eclipse.rcptt.sherlock.aspects.swt.DisplayAspect.ajc$around$org_eclipse_rcptt_sherlock_aspects_swt_DisplayAspect$1$400dfa49proceed(DisplayAspect.aj:16)
at org.eclipse.rcptt.sherlock.aspects.swt.DisplayAspect.ajc$around$org_eclipse_rcptt_sherlock_aspects_swt_DisplayAspect$1$400dfa49(DisplayAspect.aj:28)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:5718)
at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:234)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
at org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveStackImpl.setSelectedElement(PerspectiveStackImpl.java:152)
at org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveStackImpl.setSelectedElement(PerspectiveStackImpl.java:1)
at org.eclipse.ui.internal.WorkbenchPage.setPerspective(WorkbenchPage.java:4041)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.openPerspective(ShowPerspectiveHandler.java:137)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.openOther(ShowPerspectiveHandler.java:112)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.execute_aroundBody0(ShowPerspectiveHandler.java:57)
at org.eclipse.ui.handlers.ShowPerspectiveHandler$AjcClosure1.run(ShowPerspectiveHandler.java:1)
at org.eclipse.rcptt.tesla.recording.aspects.WorkbenchRecordingAspect.ajc$around$org_eclipse_rcptt_tesla_recording_aspects_WorkbenchRecordingAspect$2$943c663bproceed(WorkbenchRecordingAspect.aj:55)
at org.eclipse.rcptt.tesla.recording.aspects.WorkbenchRecordingAspect.ajc$around$org_eclipse_rcptt_tesla_recording_aspects_WorkbenchRecordingAspect$2$943c663b(WorkbenchRecordingAspect.aj:67)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.execute(ShowPerspectiveHandler.java:48)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute_aroundBody0(HandlerProxy.java:283)
at org.eclipse.ui.internal.handlers.HandlerProxy$AjcClosure1.run(HandlerProxy.java:1)
at org.eclipse.rcptt.tesla.recording.aspects.WorkbenchRecordingAspect.ajc$around$org_eclipse_rcptt_tesla_recording_aspects_WorkbenchRecordingAspect$2$943c663bproceed(WorkbenchRecordingAspect.aj:55)
at org.eclipse.rcptt.tesla.recording.aspects.WorkbenchRecordingAspect.ajc$around$org_eclipse_rcptt_tesla_recording_aspects_WorkbenchRecordingAspect$2$943c663b(WorkbenchRecordingAspect.aj:67)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:277)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:95)
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.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:318)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:252)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:498)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:195)
at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher.selectPerspective(PerspectiveSwitcher.java:570)
at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher.access$1(PerspectiveSwitcher.java:566)
at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher$2.widgetSelected(PerspectiveSwitcher.java:316)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5618)
}}
Another Exception is thrown when the switching from DRL edit to 'RETE TREE' tab.
{{java.lang.Exception: Unable to parse rules to show RETE view! 2 parser errors
at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:161)
at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
java.lang.RuntimeException: unknown version 11
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.toNativeVersion(EclipseJavaCompilerSettings.java:101)
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.toNativeSettings(EclipseJavaCompilerSettings.java:112)
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.<init>(EclipseJavaCompilerSettings.java:73)
at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:383)
at org.drools.compiler.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49)
at org.drools.compiler.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:420)
at org.drools.compiler.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:61)
at org.drools.compiler.compiler.PackageRegistry.compileAll(PackageRegistry.java:84)
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileAll(KnowledgeBuilderImpl.java:1442)
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.wireAllRules(KnowledgeBuilderImpl.java:925)
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addPackage(KnowledgeBuilderImpl.java:913)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:663)
at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:518)
at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:141)
at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
}}
> Support Java 11 projects
> ------------------------
>
> Key: DROOLS-4786
> URL: https://issues.jboss.org/browse/DROOLS-4786
> Project: Drools
> Issue Type: Bug
> Affects Versions: 7.29.0.Final
> Reporter: Reguel Wermelinger
> Assignee: Mario Fusco
> Priority: Major
>
> NullPointer occures when using drools with java 11.
> The eclipse DRL editor logs warning in 'Debug' perspective since an attempt to install breakpoint support for java 11 natured projects fails. As the integrated ASM libs support up to java 12, it seems like a false positive.
> {{java.lang.RuntimeException: value '11' is not a valid language level
> at org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:102)
> at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:618)
> at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:587)
> at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:492)
> at org.drools.eclipse.editors.DroolsLineBreakpointAdapter.canToggleLineBreakpoints(DroolsLineBreakpointAdapter.java:44)
> at org.eclipse.debug.internal.ui.actions.breakpoints.RetargetToggleBreakpointAction.canPerformAction(RetargetToggleBreakpointAction.java:46)
> at org.eclipse.debug.internal.ui.actions.RetargetAction.isTargetEnabled(RetargetAction.java:223)
> at org.eclipse.debug.internal.ui.actions.RetargetAction.partActivated(RetargetAction.java:162)
> at org.eclipse.debug.internal.ui.actions.RetargetAction.init(RetargetAction.java:94)
> at org.eclipse.debug.internal.ui.actions.breakpoints.RetargetBreakpointAction.init(RetargetBreakpointAction.java:56)
> at org.eclipse.ui.internal.WWinPluginAction.initDelegate(WWinPluginAction.java:175)
> at org.eclipse.ui.internal.PluginAction.createDelegate(PluginAction.java:121)
> at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:255)
> at org.eclipse.ui.internal.WWinPluginAction.refreshSelection(WWinPluginAction.java:263)
> at org.eclipse.ui.internal.WWinPluginAction.<init>(WWinPluginAction.java:111)
> at org.eclipse.ui.internal.ActionDescriptor.createAction(ActionDescriptor.java:259)
> at org.eclipse.ui.internal.ActionDescriptor.<init>(ActionDescriptor.java:177)
> at org.eclipse.ui.internal.PluginActionSetBuilder.createActionDescriptor(PluginActionSetBuilder.java:130)
> at org.eclipse.ui.internal.PluginActionBuilder.readElement(PluginActionBuilder.java:160)
> at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:123)
> at org.eclipse.ui.internal.registry.RegistryReader.readElementChildren(RegistryReader.java:112)
> at org.eclipse.ui.internal.PluginActionBuilder.readElement(PluginActionBuilder.java:143)
> at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:123)
> at org.eclipse.ui.internal.PluginActionSetBuilder.readActionExtensions(PluginActionSetBuilder.java:248)
> at org.eclipse.ui.internal.PluginActionSetBuilder.processActionSets(PluginActionSetBuilder.java:215)
> at org.eclipse.ui.internal.ActionPresentation.setActionSets(ActionPresentation.java:190)
> at org.eclipse.ui.internal.WorkbenchWindow.updateActionSets(WorkbenchWindow.java:2586)
> at org.eclipse.ui.internal.WorkbenchPage.lambda$3(WorkbenchPage.java:2978)
> at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
> at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
> at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:146)
> at org.eclipse.swt.widgets.Display.syncExec_aroundBody16(Display.java:5728)
> }}
> *Another Exception is thrown when the switching from DRL edit to 'RETE TREE' tab.*
> {{java.lang.Exception: Unable to parse rules to show RETE view! 2 parser errors
> at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:161)
> at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
> at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
> java.lang.RuntimeException: unknown version 11
> at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.toNativeVersion(EclipseJavaCompilerSettings.java:101)
> at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.toNativeSettings(EclipseJavaCompilerSettings.java:112)
> at org.drools.compiler.commons.jci.compilers.EclipseJavaCompilerSettings.<init>(EclipseJavaCompilerSettings.java:73)
> at org.drools.compiler.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:383)
> at org.drools.compiler.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49)
> at org.drools.compiler.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:420)
> at org.drools.compiler.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:61)
> at org.drools.compiler.compiler.PackageRegistry.compileAll(PackageRegistry.java:84)
> at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileAll(KnowledgeBuilderImpl.java:1442)
> at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.wireAllRules(KnowledgeBuilderImpl.java:925)
> at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addPackage(KnowledgeBuilderImpl.java:913)
> at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:663)
> at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:518)
> at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:141)
> at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
> at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
> }}
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