yyqdbngt opened a new pull request, #2921:
URL: https://github.com/apache/rocketmq-dashboard/pull/2921

   ## Summary
   - Parse `studio.alerting.snapshot-retention` defensively in 
`CollectorScheduler.cleanUpSnapshots()`, reusing the existing 
`parsePositiveDuration` helper (now parameterized with a setting name for 
accurate log messages)
   - A malformed or non-positive retention value falls back to the 24h default 
retention with a warning instead of throwing out of the scheduled task
   
   ## Why
   `cleanUpSnapshots()` ran `Duration.parse(properties.getSnapshotRetention())` 
without any guard, while its two sibling settings 
(`studio.alerting.collection-timeout` and 
`studio.alerting.collection-lease-duration`) already use defensive parsing. A 
typo in the retention value (e.g. `1h` instead of `PT1H`) made the hourly 
cleanup task throw a `DateTimeParseException` on every run, so the short-lived 
`rmq_metric_snapshot` table grew unbounded until the configuration was fixed.
   
   ## Testing
   - `mvn -Dtest=CollectorSchedulerTest test` → Tests run: 7, Failures: 0, 
Errors: 0 (1 new: a malformed retention value no longer throws and still 
deletes expired snapshots using the fallback)
   


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