#34 Cannot start Tomcat

[Brian Wood]

I updated to Eclipse Oxygen - never had any issue before when upgrading Eclipse. Verified Tomcat settings - Tomcat home, server config file.

!ENTRY net.sf.eclipse.tomcat 4 4 2017-10-25 15:49:18.535
!MESSAGE Impossible to start Tomcat
Check home directory setup in Tomcat preference page/n

!ENTRY net.sf.eclipse.tomcat 4 4 2017-10-25 15:49:18.536
!MESSAGE java.lang.NullPointerException
at org.eclipse.jdt.launching.JavaLaunchDelegate.launch(JavaLaunchDelegate.java:87)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:885)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:739)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:731)
at net.sf.eclipse.tomcat.VMLauncherUtility.runVM(VMLauncherUtility.java:92)
at net.sf.eclipse.tomcat.TomcatBootstrap.runTomcatBootsrap(TomcatBootstrap.java:229)
at net.sf.eclipse.tomcat.TomcatBootstrap.start(TomcatBootstrap.java:109)
at net.sf.eclipse.tomcat.actions.StartActionDelegate.run(StartActionDelegate.java:43)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:247)
at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:219)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
at org.eclipse.jface.action.ActionContributionItem.lambda$5(ActionContributionItem.java:436)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4257)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1502)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1525)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1510)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1314)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4081)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3698)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1044)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
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:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1499)

[Tilman Neumann]

Hi Brian,
I ggogled the error and found https://bugs.eclipse.org/bugs/show_bug.cgi?id=520672 and
https://bugs.eclipse.org/bugs/show_bug.cgi?id=519984.
Are you using Exclipse Oxygen and/or Java 9 ?
Then an update to Oxygen.1a might solve the issue.

[Brian Wood]

Yes, as I indicated, I am using Oxygen. I am on Java 8. How can you know what version you are installing? I cannot update - I am forced to use the new Eclipse installer - I opened another bug with that. Why can't you just download versions of Eclipse anymore? They have this fancy installer which doesn't work.

[Tilman Neumann]

On http://www.eclipse.org/downloads/eclipse-packages/ they say that the installer will install Eclipse Oxygen.1a (4.7.1a). And if you have an older Eclipse Oxygen installed, you should be able to update it via Help > Check for updates, I think?

[Brian Wood]

I have 4.7.0. check for updates fails with proxy authentication required - but my proxy settings are correct.

[Brian Wood]

Finally found the DMG file for download - bypassing the installer applicaiton. Installed Oxygen 1a (4.7.1a), and installed the plugin, and it works.

[Tilman Neumann]

Fine. Ticket closed.