https://xuezhaojun.github.io/tags/map/Recent content in Map on Zhao XueHugoen-usSat, 18 Apr 2026 00:00:00 +0000https://xuezhaojun.github.io/collections/go-internals/go-map/Sat, 18 Apr 2026 00:00:00 +0000https://xuezhaojun.github.io/collections/go-internals/go-map/生产环境的 K8s controller 突然 fatal error: concurrent map read and map write 崩溃退出，不是 panic，recover 也救不了。从这个事故出发，搞清楚 map 的并发问题、遍历随机性、delete 不缩容等实战中真正会踩的坑。