Program: 118846
Project: 118846
Buggy source:
@Override public Object execute(ExecutionEvent event) throws ExecutionException {
  String eventType=event.getParameter(EVENT_TYPE);
  if (EVENT_TYPE_ON_OPEN.equals(eventType)) {
    boolean isNotFirstTimeShow=OnBoardingResourceUtil.getPreferenceStore().getBoolean(PREFERENCE_ONBOARDING_RESOURCE_NOT_FIRSTTIME_SHOW);
    if (!isNotFirstTimeShow) {
      OnBoardingResourceUtil.getPreferenceStore().setValue(PREFERENCE_ONBOARDING_RESOURCE_NOT_FIRSTTIME_SHOW,true);
synchronized (lockThread) {
        if (lockThread.isAlive()) {
          CommonExceptionHandler.process(new Throwable("String_Node_Str"));
        }
 else {
          lockThread=createLockThread();
          lockThread.start();
        }
      }
    }
    Display.getDefault().syncExec(new Runnable(){
      @Override public void run(){
        IWorkbenchWindow workbenchWindow=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        IIntroManager introManager=workbenchWindow.getWorkbench().getIntroManager();
        if (introManager.hasIntro()) {
          IIntroPart introPart=introManager.getIntro();
          if (introPart != null) {
            introManager.showIntro(workbenchWindow,true);
            introManager.closeIntro(introManager.getIntro());
          }
        }
      }
    }
);
  }
  if (EVENT_TYPE_ON_CLOSE.equals(eventType)) {
synchronized (lockThread) {
      lockThread.interrupt();
    }
  }
  if (EVENT_TYPE_ON_STEP.equals(eventType)) {
    String pluginId=event.getParameter(PARAM_PLUGIN_ID);
    String zipPath=event.getParameter(PARAM_ZIP_PATH);
    String jobName=event.getParameter(PARAM_JOB_NAME);
    doImport(pluginId,zipPath,jobName);
  }
  return null;
}

Fixed version (ground truth):
@Override public Object execute(ExecutionEvent event) throws ExecutionException {
  String eventType=event.getParameter(EVENT_TYPE);
  if (EVENT_TYPE_ON_OPEN.equals(eventType)) {
    boolean isNotFirstTimeShow=OnBoardingResourceUtil.getPreferenceStore().getBoolean(PREFERENCE_ONBOARDING_RESOURCE_NOT_FIRSTTIME_SHOW);
    if (!isNotFirstTimeShow) {
      OnBoardingResourceUtil.getPreferenceStore().setValue(PREFERENCE_ONBOARDING_RESOURCE_NOT_FIRSTTIME_SHOW,true);
synchronized (lockThread) {
        if (lockThread.isAlive()) {
          CommonExceptionHandler.process(new Throwable("String_Node_Str"));
        }
 else {
          lockThread=createLockThread();
          lockThread.start();
        }
      }
    }
    Display.getDefault().syncExec(new Runnable(){
      @Override public void run(){
        IWorkbenchWindow workbenchWindow=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        IIntroManager introManager=workbenchWindow.getWorkbench().getIntroManager();
        if (introManager.hasIntro()) {
          IIntroPart introPart=introManager.getIntro();
          if (introPart != null) {
            introManager.showIntro(workbenchWindow,true);
            introManager.closeIntro(introManager.getIntro());
          }
        }
      }
    }
);
    initializeParameters();
  }
  if (EVENT_TYPE_ON_CLOSE.equals(eventType)) {
synchronized (lockThread) {
      lockThread.interrupt();
    }
  }
  if (EVENT_TYPE_ON_STEP.equals(eventType)) {
    String pluginId=event.getParameter(PARAM_PLUGIN_ID);
    String zipPath=event.getParameter(PARAM_ZIP_PATH);
    String jobName=event.getParameter(PARAM_JOB_NAME);
    doImport(pluginId,zipPath,jobName);
  }
  return null;
}