Summary The question revolves around whether the FuncUnit object can be used with await to guarantee that a function is executed after all previous FuncUnit actions have completed. The FuncUnit object has a then method, which suggests it could be used with await, but its compatibility with Promises is unclear. Root Cause The root cause … Read more
Summary This incident examines a common architectural failure in JavaScript backends: long‑running device‑polling processes launched from HTTP handlers without a lifecycle management strategy. The system behaved unpredictably because the API attempted to start, track, and stop background processes using ad‑hoc references rather than a structured process manager. Root Cause The root cause was treating long‑running … Read more
Summary This incident stemmed from a malformed fscanf format string that attempted to “skip unwanted characters” before a comma using invalid scanset syntax. The result was undefined behavior, buffer corruption, and inconsistent parsing across lines with long fields. Root Cause The failure was caused by incorrect use of scansets in fscanf, specifically patterns like: *[^,] … Read more
Summary A build failure occurred when compiling a multi‑file C++ project on Compiler Explorer. The compiler reported that it could not locate the header file efanna2e/index_kdtree.h, even though the project used a namespace named efanna2e. The issue stemmed from incorrect include paths and mismatched directory structure, not from namespaces themselves. Root Cause The failure was … Read more
Summary This postmortem analyzes a common engineering debate inside WordPress/Elementor teams: Sections vs. Containers. The conflict arose when junior engineers proposed adopting Elementor’s newer Flexbox Containers, while senior engineers insisted on continuing with classic Sections due to historical usage and perceived responsiveness advantages. The disagreement exposed deeper issues in technical decision‑making, legacy inertia, and misunderstanding … Read more
Summary A PutDatabaseRecord failure in Apache NiFi occurred because incoming CSV records did not map correctly to the required PostgreSQL column name, causing NiFi to reject the insert with: “Record does not have a value for the Required column ‘name’.” Root Cause The failure was triggered by a mismatch between the CSV structure and the … Read more
Summary A recent WhatsApp Desktop update introduced a regression where the application no longer registers itself as a share target in Windows Explorer. As a result, WhatsApp Desktop disappears from the Windows “Share” menu, preventing users from sending files directly from File Explorer. Root Cause The underlying issue stems from WhatsApp Desktop failing to correctly … Read more
Summary The ‘incomplete type’ error in C++ arises from circular dependencies between classes or templates. In the given scenario, T::U depends on M::I, which in turn depends on M::V, derived from T::U, creating a cycle. This prevents the compiler from fully defining types, leading to errors. Root Cause Circular Dependency: T::U relies on M::I, which … Read more
Summary The issue occurs when applying display: flex; with justify-content: center; and align-items: center; to the <body> element, causing the page content to be vertically and horizontally centered, but also introducing unexpected vertical whitespace at the top. This results in the page appearing “cut off” on larger screens. Root Cause Flexbox on <body>: The <body> … Read more
Summary A production incident occurred in a Persian‑language financial application where informal Persian number words were parsed incorrectly, producing wrong integer Rial values. The failure stemmed from ambiguous colloquial forms, mixed units (تومان/ریال), and inconsistent tokenization rules. The system behaved unpredictably when users combined spoken‑style numerals, misspellings, and magnitude units in the same sentence. Root … Read more