Program: 102091
Project: 102091
Buggy source:
/** 
 * @see org.eclipse.jface.action.IAction#run()
 * @since 5.0
 */
@Override public void run(){
  final IWorkbenchWindow iww=VdbUiPlugin.singleton.getCurrentWorkbenchWindow();
  IFile selectedVdb=null;
  if (!getSelection().isEmpty()) {
    selectedVdb=(IFile)SelectionUtilities.getSelectedObjects(getSelection()).get(0);
  }
  try {
    ITeiidServer teiidServer=cachedServer;
    if (teiidServer == null) {
      teiidServer=DqpPlugin.getInstance().getServerManager().getDefaultServer();
      if (teiidServer == null) {
        if (RuntimeAssistant.ensureServerConnection(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),getString("String_Node_Str"),true)) {
          teiidServer=DqpPlugin.getInstance().getServerManager().getDefaultServer();
          teiidServer.connect();
        }
 else {
          return;
        }
      }
 else {
        if (RuntimeAssistant.ensureServerConnection(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),getString("String_Node_Str"),false)) {
          teiidServer=DqpPlugin.getInstance().getServerManager().getDefaultServer();
          teiidServer.connect();
        }
 else {
          return;
        }
      }
    }
    String vdbName=cachedVdbName;
    if (vdbName == null) {
      vdbName=selectedVdb.getLocation().removeFileExtension().lastSegment();
    }
    ITeiidVdb deployedVDB=teiidServer.getVdb(vdbName);
    if (deployedVDB == null) {
      boolean result=MessageDialog.openQuestion(iww.getShell(),getString("String_Node_Str"),getString("String_Node_Str",vdbName));
      if (!result)       return;
    }
    doCreateDataSource(vdbName,teiidServer);
  }
 catch (  Exception e) {
    if (selectedVdb != null) {
      MessageDialog.openError(getShell(),getString("String_Node_Str",selectedVdb.getName()),e.getMessage());
      DqpUiConstants.UTIL.log(IStatus.ERROR,e,getString("String_Node_Str",selectedVdb.getName()));
    }
 else {
      MessageDialog.openError(getShell(),getString("String_Node_Str"),e.getMessage());
      DqpUiConstants.UTIL.log(IStatus.ERROR,e,getString("String_Node_Str"));
    }
  }
}

Fixed version (ground truth):
/** 
 * @see org.eclipse.jface.action.IAction#run()
 * @since 5.0
 */
@Override public void run(){
  final IWorkbenchWindow iww=VdbUiPlugin.singleton.getCurrentWorkbenchWindow();
  IFile selectedVdb=null;
  if (!getSelection().isEmpty()) {
    selectedVdb=(IFile)SelectionUtilities.getSelectedObjects(getSelection()).get(0);
  }
  try {
    ITeiidServer teiidServer=cachedServer;
    if (teiidServer == null) {
      teiidServer=DqpPlugin.getInstance().getServerManager().getDefaultServer();
      if (teiidServer == null) {
        if (RuntimeAssistant.ensureServerConnection(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),getString("String_Node_Str"),true)) {
          teiidServer=DqpPlugin.getInstance().getServerManager().getDefaultServer();
          teiidServer.connect();
        }
 else {
          return;
        }
      }
 else {
        if (RuntimeAssistant.ensureServerConnection(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),getString("String_Node_Str"),false)) {
          teiidServer=DqpPlugin.getInstance().getServerManager().getDefaultServer();
          teiidServer.connect();
        }
 else {
          return;
        }
      }
    }
    String vdbName=cachedVdbName;
    if (vdbName == null) {
      vdbName=selectedVdb.getLocation().removeFileExtension().lastSegment();
    }
    ITeiidVdb deployedVDB=teiidServer.getVdb(vdbName);
    if (deployedVDB == null) {
      boolean result=MessageDialog.openQuestion(iww.getShell(),getString("String_Node_Str"),getString("String_Node_Str",vdbName));
      if (!result)       return;
    }
    doCreateDataSource(vdbName,teiidServer,false);
  }
 catch (  Exception e) {
    if (selectedVdb != null) {
      MessageDialog.openError(getShell(),getString("String_Node_Str",selectedVdb.getName()),e.getMessage());
      DqpUiConstants.UTIL.log(IStatus.ERROR,e,getString("String_Node_Str",selectedVdb.getName()));
    }
 else {
      MessageDialog.openError(getShell(),getString("String_Node_Str"),e.getMessage());
      DqpUiConstants.UTIL.log(IStatus.ERROR,e,getString("String_Node_Str"));
    }
  }
}