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

AngularJS - Build a custom validation directive for using multiple emails in textarea

AngularJS already supports the built-in validation with text input with type email. Something simple likes the following:
<input name="input" ng-model="email.text" required="" type="email" /> <span class="error" ng-show="myForm.input.$error.email"> Not valid email!</span>
However, I used a text area and I wanted to enter some email addresses that's saparated by a comma (,). I had a short research and it looked like AngualarJS has not supported this functionality so far. Therefore, I needed to build a custom directive that I could add my own validation functions. My validation was done only on client side, so I used the $validators object.

Note that, there is the $asyncValidators object which handles asynchronous validation, such as making an $http request to the backend.

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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</groupId&g…

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1. Dowload autoNumeric.js file from https://github.com/BobKnothe/autoNumeric
2. Import to project
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Attribute 'for' of label component with id xxxx is not defined

I got the warning in the log file when I have used the tag <h:outputLabel> without attribute "for" in xhtml file. It was really polluting my server log files.

The logged information actually makes sense anyway! We could find an answer as the following:

"Having h:outputLabel without a "for" attribute is meaningless. If you are not attaching the label, you should be using h:outputText instead of h:outputLabel."

However, these solutions are not possible just for my situation. Instead of using h:outputText for only displaying text, my team has used h:outputLabel too many places. We were nearly in our release time (next day) so it is quite risky and takes much efforts if we try to correct it. Because the style (with CSS) is already done with h:ouputLabel. The alternative by adding attribute "for" the existing h:outputLabel is not reasonable either. I really need to find another solution.
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