Program: 45262
Project: 45262
Buggy source:
public String execute(){
  _user=getSessionUser();
  int catID=-1;
  int start=-1;
  int count=-1;
  long gCatKey=(long)-1;
  String issueName=null;
  List<Long> keys=new ArrayList<Long>();
  try {
    for (    Object pn : _params.keySet()) {
      String paramName=(String)pn;
      if (paramName.startsWith("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         keys.add(Long.valueOf(pv));
 else         continue;
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         gCatKey=Long.parseLong(pv);
      }
 else       if (paramName.equals("String_Node_Str")) {
        issueName=getParamValue(paramName);
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         catID=Integer.parseInt(pv);
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         start=Integer.parseInt(pv);
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         count=Integer.parseInt(pv);
      }
    }
    addActionMessage(getText("String_Node_Str"));
  }
 catch (  Exception e) {
    _log.error("String_Node_Str",e);
    addActionError(getText("String_Node_Str"));
  }
  if (gCatKey != -1)   Category.deleteNewsItems(gCatKey,keys);
  java.util.Date ldt=newsrack.archiver.DownloadNewsTask.getLastDownloadTime();
synchronized (GlobalConstants.DF) {
    _lastDownloadTime=GlobalConstants.DF.format(ldt);
  }
  if (issueName != null) {
    _issue=_user.getIssue(issueName);
    if (_issue != null) {
      if (catID > 0) {
        _currCat=_issue.getCategory(catID);
        if (_currCat != null) {
          LinkedList<Category> ancestors=new LinkedList<Category>();
          Category cat=_currCat;
          while (cat != null) {
            cat=cat.getParent();
            if (cat != null)             ancestors.addFirst(cat);
          }
          _catAncestors=ancestors;
        }
      }
    }
  }
  return Action.SUCCESS;
}

Fixed version (ground truth):
public String execute(){
  _user=getSessionUser();
  int catID=-1;
  int start=-1;
  int count=-1;
  long gCatKey=(long)-1;
  String issueName=null;
  List<Long> keys=new ArrayList<Long>();
  try {
    for (    Object pn : _params.keySet()) {
      String paramName=(String)pn;
      if (paramName.startsWith("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         keys.add(Long.valueOf(pv));
 else         continue;
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         gCatKey=Long.parseLong(pv);
      }
 else       if (paramName.equals("String_Node_Str")) {
        issueName=getParamValue(paramName);
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         catID=Integer.parseInt(pv);
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         start=Integer.parseInt(pv);
      }
 else       if (paramName.equals("String_Node_Str")) {
        String pv=getParamValue(paramName);
        if (pv != null)         count=Integer.parseInt(pv);
      }
    }
    addActionMessage(getText("String_Node_Str"));
  }
 catch (  Exception e) {
    _log.error("String_Node_Str",e);
    addActionError(getText("String_Node_Str"));
  }
  if (gCatKey != -1) {
    Category.deleteNewsItems(gCatKey,keys);
    _user=getSessionUser();
  }
  java.util.Date ldt=newsrack.archiver.DownloadNewsTask.getLastDownloadTime();
synchronized (GlobalConstants.DF) {
    _lastDownloadTime=GlobalConstants.DF.format(ldt);
  }
  if (issueName != null) {
    _issue=_user.getIssue(issueName);
    if (_issue != null) {
      if (catID > 0) {
        _currCat=_issue.getCategory(catID);
        if (_currCat != null) {
          LinkedList<Category> ancestors=new LinkedList<Category>();
          Category cat=_currCat;
          while (cat != null) {
            cat=cat.getParent();
            if (cat != null)             ancestors.addFirst(cat);
          }
          _catAncestors=ancestors;
        }
      }
    }
  }
  return Action.SUCCESS;
}