NullPionterException in VPE Preview Editor initialization --------------------------------------------------------- Key: JBIDE-18055 URL: https://issues.jboss.org/browse/JBIDE-18055 Project: Tools (JBoss Tools) Issue Type: Bug Components: visual-page-editor-core Affects Versions: 4.2.0.Beta3 Reporter: Denis Golovin Assignee: Konstantin Marmalyukov Priority: Minor Fix For: 4.3.0.Alpha2 Exception below can happen sometimes in case re-sizing visual preview part while preview server serving the editor is not started yet. {code}java.lang.NullPointerException at org.jboss.tools.vpe.preview.core.server.VpvServer.getPort(VpvServer.java:66) at org.jboss.tools.vpe.preview.editor.VpvEditor.formRequestToServer(VpvEditor.java:503) at org.jboss.tools.vpe.preview.editor.VpvEditor.reload(VpvEditor.java:494) at org.jboss.tools.vpe.preview.editor.VpvEditorPart.updateVisualEditorVisibility(VpvEditorPart.java:769) at org.jboss.tools.vpe.preview.editor.VpvEditorPart$5.controlResized(VpvEditorPart.java:386) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:235) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1412) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1393) at org.eclipse.swt.widgets.Control.setBounds(Control.java:1042) at org.eclipse.swt.widgets.Composite.setBounds(Composite.java:1435) at org.eclipse.swt.widgets.Control.setBounds(Control.java:851) at org.eclipse.swt.custom.SashForm.onDragSash(SashForm.java:288) at org.eclipse.swt.custom.SashForm$1.handleEvent(SashForm.java:90) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1412) at org.eclipse.swt.widgets.Widget.sendSelectionEvent(Widget.java:1526) at org.eclipse.swt.widgets.Sash.gtk_motion_notify_event(Sash.java:396) at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2104) at org.eclipse.swt.widgets.Control.windowProc(Control.java:5510) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4700) at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method) at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9074) at org.eclipse.swt.widgets.Display.eventProc(Display.java:1253) at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method) at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2473) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3439) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135) 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:382) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) {code}