Summary This incident stemmed from a type‑mismatch bug in a PHP cURL integration with Google’s computeRoutes API. A developer attempted to pass a stdClass object directly into CURLOPT_POSTFIELDS, which only accepts strings, arrays, or URL‑encoded form data. The result was the runtime error: “Object of class stdClass could not be converted to string.” Root Cause … Read more
Summary In C, the difference between typedef struct {} Node and typedef struct _node{} Node lies in the struct tag and forward declaration. Using a tagged struct (_node) allows for forward referencing, enabling the compiler to recognize the struct before its full definition. This is crucial for self-referential structures like linked lists. Root Cause The … Read more
Summary The PCF control build failed with error [pcf-1014] [Error] Manifest validation problem: instance requires property “manifest”. This issue arose due to incorrect configuration in the pcfconfig.json file, specifically the missing or misnamed “manifest” property under the control definition. Root Cause Misconfiguration in pcfconfig.json: The “manifest” property was either missing or incorrectly named under the … Read more
Summary Google Play flagged our React Native app for misuse of FOREGROUND_SERVICE permissions, despite functional push notifications. The app received notifications post-termination due to a foreground service, violating Play Store policies. Key issue: improper permission declaration and overuse of foreground services. Root Cause Unnecessary FOREGROUND_SERVICE_DATA_SYNC permission included in AndroidManifest.xml. Foreground service misuse: Used for push … Read more
Summary This postmortem explains why JavaScript treats object as a data type, and why the infamous typeof null === “object” behavior exists. These behaviors often confuse developers coming from class‑based languages like Java, but they stem from historical design decisions and how JavaScript represents values internally. Root Cause The root causes are twofold: JavaScript’s type … Read more
Summary This postmortem analyzes a common architectural decision gone wrong: relying on SAP HANA as an unnecessary replication layer for MySQL and MSSQL reporting workloads, then later attempting to migrate those reports into Metabase with embedded dashboards. The core issue was assuming that HANA would simplify reporting, when in reality it introduced latency, cost, and … Read more
Summary An API was designed to return a list of stock names based on a provided sector name. However, it failed to handle edge cases, such as invalid sector names or sectors with no associated stocks, leading to unexpected 500 Internal Server Errors. Root Cause Lack of input validation: The API did not validate sector … Read more
Summary Deploying a Vite + React app on Plesk resulted in a 404 error on route refresh due to missing history fallback configuration. The issue arose from treating the app as static files without proper client-side routing support. Root Cause Missing History Fallback: React Router’s client-side routing requires a fallback to index.html for non-root routes, … Read more
Summary A long‑running Dagster deployment using DockerRunLauncher began failing with ConnectionRefusedError when attempting to talk to the host Docker daemon through /var/run/docker.sock. The host daemon had been restarted, but the Dagster container continued using a stale bind‑mounted socket inode, causing all Docker API calls to fail until the container itself was restarted. Root Cause The … Read more
Summary In a recent simulation of a distribution center using AnyLogic, a critical issue arose where trucks were only assigned to a single dock, causing inefficiencies in pallet handling. The root cause was the lack of dynamic dock assignment logic, leading to underutilized resources and delayed shipments. Root Cause Fixed Dock Assignment: Trucks were hardcoded … Read more