How did you fix the hardest bug that you have ever seen?

"Holy shit"

Have you ever fixed a feature that has a lot of issues? I had met this situation. I would like to tell you my process to deal with it.

My problem: Fixing the wrong validation after hitting the F5 on a page.

Step 1. List out all of issues that I met on this feature.

Yeah, after hitting F5, I got:
- The validation dialog could not be closed.
- The data of the page could not be reverted the previous data.
- I wonder why it automatically called the new select event on the combobox on the page?

Step 2. Fix the problem: issue by issue, simple to complicated.

- Try to close the dialog -> solved
- Try to revert the previous data -> solved
- Try to fix the last issue -> I was so confused about this case. I spent haft day find the root caused but I could not solve it. I decided go to step 3.

Step 3. Tell to other members about my problems. Discussing for the win!

There are six people in the discussing. We had a lot of guessing, a lot of investigating, a lot of ideas, so on. And..., we finally figured out the root cause is related to the "focusing" and "focusing out".

In my opinion, the key for solving this problem is keeping our mind calm during the time fixing and listening to someone when we get stuck at some items.

How do you think about that?

Comments

BIRT - Fix the size of an image

I use a dynamic image as a logo my report in pdf. At the beginning, I use table to align the logo in left or right. I meet a problem with some images with a large width or height. My customer requires that the logo should be displayed in original size. These following steps solves my problem: 1. Use Grid instead of Table 2. Set Grid "Height" is 100% and "Width" is blank 3. Set "Fit to container" for images are "true". Download the the template here .

Make simple music program with beep(freq, duration) with Pascal

Pascal is my first programing language when I have studied in high school. It was really exciting for me. :) The Pascal programming language was created by Niklaus Wirth in 1970. It was named after Blaise Pascal, a famous French Mathematician. It was made as a language to teach programming and to be reliable and efficient. Pascal has since become more than just an academic language and is now used commercially . I tried to make a simple music program by using Lazarus IDE on MS Window 7, 64-bit. It frustrated me a few times how difficulty to use Sound command to make a sound. Sound did not work on my compiler and my platform anymore. So far, I just could use beep(freq, duration) from window unit to implement my work. Here is my code. ;) program mysong; uses Windows, crt; const C: Integer = 512; { x = A * EXP(LN(2)/12)} C_: Integer = 542; D: Integer = 574; D_: Integer = 608; E: Integer = 644; F: Integer = 682; F_: Integer = 723; G: Integer = ...

Styling Sort Icons Using Font Awesome for Primefaces' Data Table

So far, Primefaces has used image sprites for displaying the sort icons. This leads to a problem if we want to make a different style for these icons; for example, I would make the icon "arrow up" more blurry at the first time the table loading because I want to highlight the icon "arrow down". I found a way that I can replace these icons with Font Awesome icons. We will use "CSS Pseudo-classes" to achieve it. The hardest thing here is that we should handle displaying icons in different cases. There is a case both "arrow up" and "arrow down" showing and other case is only one of these icons is shown. .ui-sortable-column-icon.ui-icon.ui-icon-carat-2-n-s { background-image: none; margin-left: 5px; font-size: 1.1666em; position: relative; } .ui-sortable-column-icon.ui-icon.ui-icon-carat-2-n-s:not(.ui-icon-triangle-1-s)::before { content: "\f106"; font-family: "FontAwesome"; position: ...

The HelloWorld example of JSF 2.2 with Myfaces

I just did by myself create a very simple app "HelloWorld" of JSF 2.2 with a concrete implementation Myfaces that we can use it later on for our further JSF trying out. I attached the source code link at the end part. Just follow these steps below: 1. Create a Maven project in Eclipse (Kepler) with a simple Java web application archetype "maven-archetype-webapp". Maven should be the best choice for managing the dependencies , so far. JSF is a web framework that is the reason why I chose the mentioned archetype for my example. 2. Import dependencies for JSF implementation - Myfaces (v2.2.10) into file pom.xml . The following code that is easy to find from http://mvnrepository.com/ with key words "myfaces". <dependency> <groupId>org.apache.myfaces.core</groupId> <artifactId>myfaces-api</artifactId> <version>2.2.10</version> </dependency> <dependency> <groupId>org.apache.myfaces.core<...

Quiz Marker - Chấm điểm AI (Beta) Available Now!

My Fansipanio Team has just launched our first product #QuizMarker, an efficient AI assistant for Vietnamese school teachers to mark their students' quizzes today. Visit Quiz Maker - Chấm điểm AI: Trợ lý chấm thi trắc nghiệm đắc lực của giáo viên for the detail.

vhandit

Search This Blog