Tell about your failure at work.

One of my work mistakes was related to improper transaction management in a Java application. I encountered a situation where a transaction was not properly completed (neither commit nor rollback was called), which led to resource locking and decreased database performance.

As a result, some users experienced delays when using the application. After identifying the problem, I:

• Analyzed the code and identified places where transactions could remain open.
• Made corrections by adding proper transaction management using try-with-resources and explicit commit/rollback.
• Added logging for transaction monitoring.
• Conducted code reviews and wrote tests to prevent similar errors in the future.

This experience taught me to be more attentive to resource management and the importance of thorough testing of critical code sections.