macrozheng
Nov 27, 2024 · Backend Development
How a Tiny HashMap Bug Triggered a Massive Memory Leak in a High‑Traffic Microservice
A senior architect introduced a high‑concurrency monitoring feature that used a ConcurrentHashMap without proper equals/hashCode implementations, leading to duplicate keys, race conditions, and severe memory leaks, which were later resolved by correcting the key class and applying atomic map operations.
ConcurrentHashMapHashCodeJava
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