Postmortem: UI Reactivity Breakdown in Vue 3 Notification System Summary When users clicked new notifications in a Vue 3 application, some notifications failed to immediately disappear visually after backend updates. Despite successful backend updates via Axios, frontend state changes didn’t trigger reactive UI updates consistently, requiring page reloads to reflect changes. Root Cause Non-reactive parent … Read more
Postmortem: Unanimated Progress Bar Transition in TailwindCSS Summary During progress bar implementation using TailwindCSS, setting transition-duration concurrently with width changes prevented smooth animation. The duration-3000 CSS class was applied simultaneously with the 100% width update, causing the transition effect to be bypassed. Root Cause CSS transitions require persistent timing configuration during state changes transition-duration: 0s … Read more
Postmortem: Inline Datepicker Styling Failures in Flowbite + Tailwind CSS Project Summary Customizations to Flowbite’s inline datepicker failed because Tailwind’s CDN version doesn’t support arbitrary variants or complex selectors. Styles targeting nested elements were ignored, causing borders, colors, and date states to remain unchanged despite extensive CSS overrides. Root Cause Flowbite generates DOM elements dynamically … Read more
Issue Analysis: Arabic Hyperlinks Render Bold in Word Despite Missing OpenXML Bold Tag Summary Run properties Character styles (“Hyperlink”) Base styles (“DefaultParagraphFont”) Paragraph styles The system failed to reconstruct the bold rendering during document regeneration. Root Cause The bold appearance originates from Word’s locale-specific defaults for complex scripts: 2. Word internally applies bold formatting to … Read more
Production Postmortem: Tag-Based Task Execution Failure in Ansible Molecule Scenario Summary Root Cause Molecule applies –tags/–skip-tags globally to both role tasks and its internal action playbooks (create.yml/destroy.yml). The role’s always-tagged task (Make preparations) runs indiscriminately due to Ansible’s built-in always tag behavior. Tag inheritance wasn’t isolated to the role. Action playbooks lacking explicit tagging inherited … Read more
Postmortem: Docker Networking Failure in Canton Blockchain Setup Summary User attempted to deploy Canton blockchain components (Participant, Sequencer, Mediator) as separate Docker containers. Remote connections between containers failed despite individual components running. Core issue: Containers couldn’t establish network communication due to misconfigured Docker networking. Root Cause Missing Docker network bridge: Containers deployed without explicit Docker … Read more
Incident Report: ArrayIndexOutOfBoundsException When Synchronizing JTable Sort Order to JList in Java File Browser Summary A developer attempted to synchronize sorting between a JTable and a JList by capturing the sorted view indices via TableRowSorter during a sort event. They encountered an ArrayIndexOutOfBoundsException when iterating over row indices, preventing the synchronization of the file browser … Read more
Production Incident: Flash Memory Performance Degradation Due to Disabled ART Prefetch on STM32F4 Summary During hardware initialization, prefetching was inadvertently disabled in the STM32F4 memory subsystem. This caused severe performance degradation during peak traffic when instruction fetches from Flash couldn’t be anticipated by the ART Accelerator, leading to CPU stalls and unresponsive systems. Root Cause … Read more
Postmortem: Misconfiguration of NTAG213 Password Protection in Android NFC Summary A developer attempted to enable password protection on NTAG213 NFC tags using Android’s NfcA technology. After configuring the PWD, PACK, and ACCESS bytes, tags either remained unlocked or became inaccessible. The issue stemmed from incomplete configuration sequences and misunderstanding of NTAG213 authentication requirements. Root Cause … Read more
Why i = i++ Doesn’t Increment the Variable Summary Root Cause Operator precedence: Post-increment (i++) returns the original value before incrementing the variable Execution order: Why This Happens in Real Systems Attempts to compact code into fewer lines Accidental refactoring where increment logic gets merged with assignment Misunderstanding of operator behavior during quick fixes Copy-pasting … Read more