This article examines Java file change monitoring, explains the limitations of a simple timestamp‑polling approach, details a JDK bug that loses millisecond precision, explores the built‑in WatchService and its fallback to polling, and demonstrates how Linux inotify provides a more reliable solution.
To handle dynamic file changes such as rule updates, configuration reloads, or log monitoring, this article compares three Java approaches—simple polling with File#lastModified, the OS‑integrated WatchService API, and the Apache Commons‑IO monitor—detailing their implementations, advantages, drawbacks, and practical usage tips.
This article examines a real‑world file‑watching failure caused by a JDK bug, explains how Java's WatchService works (including its polling fallback), compares it with Linux's inotify mechanism, and presents practical work‑arounds for reliable configuration reloads in backend services.
This article examines a JDK bug that drops millisecond precision in file timestamps, explains why Java’s WatchService falls back to polling on macOS, contrasts it with Linux’s inotify‑based implementation, and shares practical workarounds for reliable file change detection.
An in‑depth look at a real‑world file‑watching failure caused by a JDK timestamp bug, exploring Java’s WatchService implementation, its reliance on polling versus Linux’s inotify, and practical workarounds to ensure reliable configuration reloads across platforms.
