Program: 6115
Project: 6115
Buggy source:
public MessageInf execute() throws BasicException {
  try {
    if (externalsales == null) {
      externalsales=new ExternalSalesHelper(dlsystem);
    }
    Product[] products=externalsales.getProductsCatalog();
    Customer[] customers=externalsales.getCustomers();
    if (products == null || customers == null) {
      throw new BasicException(AppLocal.getIntString("String_Node_Str"));
    }
    if (products.length > 0) {
      dlintegration.syncProductsBefore();
      Date now=new Date();
      for (      Product product : products) {
        TaxCategoryInfo tc=new TaxCategoryInfo();
        tc.setID(Integer.toString(product.getTax().getId()));
        tc.setName(product.getTax().getName());
        dlintegration.syncTaxCategory(tc);
        TaxInfo t=new TaxInfo();
        t.setID(Integer.toString(product.getTax().getId()));
        t.setName(product.getTax().getName());
        t.setTaxCategoryID(tc.getID());
        t.setRate(product.getTax().getPercentage() / 100);
        t.setCascade(false);
        dlintegration.syncTax(t);
        CategoryInfo c=new CategoryInfo();
        c.setID(Integer.toString(product.getCategory().getId()));
        c.setName(product.getCategory().getName());
        c.setImage(null);
        dlintegration.syncCategory(c);
        ProductInfoExt p=new ProductInfoExt();
        p.setID(Integer.toString(product.getId()));
        p.setReference(Integer.toString(product.getId()));
        p.setCode(product.getEan() == null || product.getEan().equals("String_Node_Str") ? Integer.toString(product.getId()) : product.getEan());
        p.setName(product.getName());
        p.setCom(false);
        p.setScale(false);
        p.setPriceBuy(product.getPurchasePrice());
        p.setPriceSell(product.getListPrice());
        p.setCategoryID(c.getID());
        p.setTaxCategoryInfo(tc);
        p.setImage(ImageUtils.readImage(product.getImageUrl()));
        dlintegration.syncProduct(p);
        if (product instanceof ProductPlus) {
          ProductPlus productplus=(ProductPlus)product;
          double diff=productplus.getQtyonhand() - dlsales.findProductStock(p.getID(),warehouse);
          Object[] diary=new Object[7];
          diary[0]=UUID.randomUUID().toString();
          diary[1]=now;
          diary[2]=diff > 0.0 ? MovementReason.IN_MOVEMENT.getKey() : MovementReason.OUT_MOVEMENT.getKey();
          diary[3]=warehouse;
          diary[4]=p.getID();
          diary[5]=new Double(diff);
          diary[6]=new Double(p.getPriceBuy());
          dlsales.getStockDiaryInsert().exec(diary);
        }
      }
    }
    if (customers.length > 0) {
      dlintegration.syncCustomersBefore();
      for (      Customer customer : customers) {
        CustomerInfoExt cinfo=new CustomerInfoExt(Integer.toString(customer.getId()));
        cinfo.setSearchkey(customer.getSearchKey());
        cinfo.setName(customer.getName());
        cinfo.setNotes(customer.getDescription());
        dlintegration.syncCustomer(cinfo);
      }
    }
    if (products.length == 0 && customers.length == 0) {
      return new MessageInf(MessageInf.SGN_NOTICE,AppLocal.getIntString("String_Node_Str"));
    }
 else {
      return new MessageInf(MessageInf.SGN_SUCCESS,AppLocal.getIntString("String_Node_Str"),AppLocal.getIntString("String_Node_Str",products.length,customers.length));
    }
  }
 catch (  ServiceException e) {
    throw new BasicException(AppLocal.getIntString("String_Node_Str"),e);
  }
catch (  RemoteException e) {
    throw new BasicException(AppLocal.getIntString("String_Node_Str"),e);
  }
catch (  MalformedURLException e) {
    throw new BasicException(AppLocal.getIntString("String_Node_Str"),e);
  }
}

Fixed version (ground truth):
public MessageInf execute() throws BasicException {
  try {
    if (externalsales == null) {
      externalsales=new ExternalSalesHelper(dlsystem);
    }
    Product[] products=externalsales.getProductsCatalog();
    Customer[] customers=externalsales.getCustomers();
    if (products == null || customers == null) {
      throw new BasicException(AppLocal.getIntString("String_Node_Str"));
    }
    if (products.length > 0) {
      dlintegration.syncProductsBefore();
      Date now=new Date();
      for (      Product product : products) {
        TaxCategoryInfo tc=new TaxCategoryInfo();
        tc.setID(product.getTax().getId());
        tc.setName(product.getTax().getName());
        dlintegration.syncTaxCategory(tc);
        TaxInfo t=new TaxInfo();
        t.setID(product.getTax().getId());
        t.setName(product.getTax().getName());
        t.setTaxCategoryID(tc.getID());
        t.setRate(product.getTax().getPercentage() / 100);
        t.setCascade(false);
        dlintegration.syncTax(t);
        CategoryInfo c=new CategoryInfo();
        c.setID(product.getCategory().getId());
        c.setName(product.getCategory().getName());
        c.setImage(null);
        dlintegration.syncCategory(c);
        ProductInfoExt p=new ProductInfoExt();
        p.setID(product.getId());
        p.setReference(product.getId());
        p.setCode(product.getEan() == null || product.getEan().equals("String_Node_Str") ? product.getId() : product.getEan());
        p.setName(product.getName());
        p.setCom(false);
        p.setScale(false);
        p.setPriceBuy(product.getPurchasePrice());
        p.setPriceSell(product.getListPrice());
        p.setCategoryID(c.getID());
        p.setTaxCategoryInfo(tc);
        p.setImage(ImageUtils.readImage(product.getImageUrl()));
        dlintegration.syncProduct(p);
        if (product instanceof ProductPlus) {
          ProductPlus productplus=(ProductPlus)product;
          double diff=productplus.getQtyonhand() - dlsales.findProductStock(p.getID(),warehouse);
          Object[] diary=new Object[7];
          diary[0]=UUID.randomUUID().toString();
          diary[1]=now;
          diary[2]=diff > 0.0 ? MovementReason.IN_MOVEMENT.getKey() : MovementReason.OUT_MOVEMENT.getKey();
          diary[3]=warehouse;
          diary[4]=p.getID();
          diary[5]=new Double(diff);
          diary[6]=new Double(p.getPriceBuy());
          dlsales.getStockDiaryInsert().exec(diary);
        }
      }
    }
    if (customers.length > 0) {
      dlintegration.syncCustomersBefore();
      for (      Customer customer : customers) {
        CustomerInfoExt cinfo=new CustomerInfoExt(customer.getId());
        cinfo.setSearchkey(customer.getSearchKey());
        cinfo.setName(customer.getName());
        cinfo.setNotes(customer.getDescription());
        dlintegration.syncCustomer(cinfo);
      }
    }
    if (products.length == 0 && customers.length == 0) {
      return new MessageInf(MessageInf.SGN_NOTICE,AppLocal.getIntString("String_Node_Str"));
    }
 else {
      return new MessageInf(MessageInf.SGN_SUCCESS,AppLocal.getIntString("String_Node_Str"),AppLocal.getIntString("String_Node_Str",products.length,customers.length));
    }
  }
 catch (  ServiceException e) {
    throw new BasicException(AppLocal.getIntString("String_Node_Str"),e);
  }
catch (  RemoteException e) {
    throw new BasicException(AppLocal.getIntString("String_Node_Str"),e);
  }
catch (  MalformedURLException e) {
    throw new BasicException(AppLocal.getIntString("String_Node_Str"),e);
  }
}