Summary In 3D graphics, we typically move the world to the camera, not the camera to the world. The glm::lookAt function constructs a view matrix that transforms vertices from world space to camera space. To achieve this, the matrix must perform the inverse translation and rotation of the camera’s actual orientation. The confusion arises because … Read more
Summary The issue described is not a bandwidth or CPU resource constraint, but rather a network transport failure causing UDP packet loss. The Jitsi Meet system interprets 4–18% packet loss as a degraded connection and proactively disables video streams to preserve the audio channel and session stability. The root cause lies in the VPS network … Read more
Summary This postmortem details a deployment failure of a Next.js application within a pnpm workspace to Firebase App Hosting. The build process encountered two distinct phases of failure, leading to an incomplete build artifact and deployment termination. The root cause was a combination of a misconfigured build command order and missing Prisma client generation before … Read more
Summary Technical Postmortem: Resume Skills Storage Architecture for Analytics and Search The central issue is a database schema anti-pattern where skills are stored as a BLOB (binary large object) in a MySQL user_data table. This approach fundamentally breaks analytics, search performance, and scalability. The root cause is treating semi-structured data (skills) as an opaque binary … Read more
Summary The core issue is an attempt to perform client-side web scraping of a modern e-commerce platform (Wildberries) directly from an Android application. The user encountered immediate request blocking, likely due to sophisticated bot detection, WAF (Web Application Firewall) rules, and TLS fingerprinting. The root cause is a fundamental architectural mismatch: treating a complex, security-hardened … Read more
Summary This postmortem addresses a common operational gap: reconstructing historical pod lifecycles (start/end times) and resource requests in Kubernetes/OpenShift clusters using Prometheus and kube-state-metrics (KSM). The core issue is that while KSM provides real-time snapshots, historical queries for ephemeral resources require specific PromQL patterns and an understanding of metric cardinality lifecycles. The primary failure mode … Read more
Summary A developer attempted to create an inline button in a Telegram bot that would open a direct chat with a user using only their username. The implementation used a URL button pointing to https://t.me/Username. However, the button click resulted in an error message stating the user does not exist, despite the username being valid. … Read more
Summary Key takeaway: The statically.io CDN endpoint path /main/ was replaced with @main/ by the provider, breaking all existing references in code and websites. This is a classic dependency path change that requires an immediate update to the URL string in the source code. Action required: Search and replace all occurrences of cdn.statically.io/…/main/ with cdn.statically.io/…/@main/. … Read more
Summary A recent graduate from India, graduating in March 2026, is facing difficulties securing a software engineering job due to limited campus placement opportunities. The individual possesses a foundational technical stack including Linux, Python, SQL, Bash, AWS, Docker, and basic ML algorithms. The core issue is a lack of strategic direction on bridging the gap … Read more
Summary HTML emails fail to render in a Flutter email client app while plain text emails display correctly. The issue stems from using the flutter_html package for rendering, which relies on an outdated HTML engine (flutter-renderer) that does not support modern CSS and interactive features required by many HTML emails. The Html widget silently fails … Read more