title: Problems occurred when invoking code from plug-in: "org.eclipse.core.resources"
body: <p>How do I resolve the above reported error message?  Additional details are given below:</p>
  
  <p><strong>Exception Stack Trace</strong></p>
  
  <pre><code>java.lang.NullPointerException
      at org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer.initialize(MavenClasspathContainerInitializer.java:48)
      at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2843)
      at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:1878)
      at org.eclipse.jdt.core.JavaCore.getClasspathContainer(JavaCore.java:3128)
      at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2691)
      at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2855)
      at org.eclipse.jdt.internal.core.ClasspathChange.generateDelta(ClasspathChange.java:220)
      at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged(DeltaProcessor.java:2052)
      at org.eclipse.jdt.internal.core.DeltaProcessingState.resourceChanged(DeltaProcessingState.java:470)
      at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
      at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
      at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395)
      at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530)
      at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2353)
      at org.eclipse.wst.jsdt.internal.core.JavaModelManager.initializeAllContainers(JavaModelManager.java:2153)
      at org.eclipse.wst.jsdt.internal.core.JavaModelManager.getJsGlobalScopeContainer(JavaModelManager.java:1530)
      at org.eclipse.wst.jsdt.core.JavaScriptCore.getJsGlobalScopeContainer(JavaScriptCore.java:1319)
      at org.eclipse.wst.jsdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2740)
      at org.eclipse.wst.jsdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:2019)
      at org.eclipse.wst.jsdt.core.JavaScriptCore.initializeAfterLoad(JavaScriptCore.java:2655)
      at org.eclipse.wst.jsdt.internal.ui.InitializeAfterLoadJob$RealJob.run(InitializeAfterLoadJob.java:32)
      at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
  </code></pre>
  
  <p><strong>Session Data</strong></p>
  
  <pre><code>eclipse.buildId=I20120608-1400
  java.version=1.7.0_08-ea
  java.vendor=Oracle Corporation
  BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
  Framework arguments:  -product org.eclipse.epp.package.jee.product -keyring /Users/ravisankars/.eclipse_keyring -showlocation
  Command-line arguments:  -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.jee.product -keyring /Users/ravisankars/.eclipse_keyring -showlocation
  </code></pre>