Code RoomSession eviction concurrent modification

MediumPrep Room Coding #2170

Session eviction concurrent modification

Code reviewCode quality & reviewMid–Senior~16 min

Review this Java method that evicts expired sessions from a shared map.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 16 min

Mark a line and say what kind of problem it is.0 findings

1void evictExpired(Map<String, Session> sessions, long nowMs) {

2 for (Map.Entry<String, Session> e : sessions.entrySet()) {

3 if (e.getValue().expiresAt < nowMs) {

4 sessions.remove(e.getKey());

5 }

6 }

7}

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.