[jboss-jira] [JBoss JIRA] (DROOLS-1511) NullPointerException when running sample projects

Tomas David created DROOLS-1511: ----------------------------------- Summary: NullPointerException when running sample projects Key: DROOLS-1511 URL: https://issues.jboss.org/browse/DROOLS-1511 Project: Drools Issue Type: Bug Components: eclipse plugin Environment: 7.0.0-SNAPSHOT Reporter: Tomas David Assignee: Robert (Bob) Brodt Priority: Blocker NullPointerException is thrown when running sample project using Drools and Java Runtime classes because KieSession is not created. {{!SESSION 2017-04-04 12:39:38.638 ----------------------------------------------- eclipse.buildId=4.6.3.M20170301-0400 java.version=1.8.0_121 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.jee.product !ENTRY org.drools.eclipse 4 120 2017-04-04 12:41:31.737 !MESSAGE Internal error in Drools Plugin: !STACK 1 Java Model Exception: Java Model Status [Build path contains duplicate entry: 'DROOLS/Drools' for project 'TestProject'] at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:786) at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3097) at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3059) at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3112) at org.drools.eclipse.util.DroolsRuntimeManager.addBuilder(DroolsRuntimeManager.java:122) at org.drools.eclipse.action.ConvertToDroolsProjectAction.run(ConvertToDroolsProjectAction.java:45) at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:247) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565) at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5227) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1340) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4561) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4151) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610) at org.eclipse.equinox.launcher.Main.run(Main.java:1519) at org.eclipse.equinox.launcher.Main.main(Main.java:1492) !SUBENTRY 1 org.eclipse.jdt.core 4 977 2017-04-04 12:41:31.739 !MESSAGE Build path contains duplicate entry: 'DROOLS/Drools' for project 'TestProject' }} -- This message was sent by Atlassian JIRA (v7.2.3#72005)