Why is DDMS no longer opening?

Question

Android DDMS was working the other day, but today (after 1.1 update) it always pops up an error message, that says to check the log file. The end of the log file is:

!ENTRY org.eclipse.osgi 4 0 2015-02-23 20:36:49.944
!MESSAGE Application error
!STACK 1
java.lang.NullPointerException
    at org.eclipse.core.runtime.URIUtil.toURI(URIUtil.java:280)
    at org.eclipse.e4.ui.internal.workbench.ResourceHandler.loadMostRecentModel(ResourceHandler.java:127)
    at org.eclipse.e4.ui.internal.workbench.swt.E4Application.loadApplicationModel(E4Application.java:370)
    at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:220)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:557)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at com.android.ide.eclipse.monitor.MonitorApplication.start(MonitorApplication.java:86)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    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:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

The SDK seems up-to-date yet no ddms, Ubuntu 14.04. Is this a known bug or is there extra setup required for this update??

Answer 1

Check your processes, you likely have another instance of the monitor or ddms tool running. Pretty lame of Google not to expect that might happen and give a nice message about it.