dailz
408138b3c8
Put/Delete checked writeStopped then called queue.Submit (which sends on a channel). Close set writeStopped then closed the channel. With no synchronization between the check and Submit, a concurrent Close could close the channel during the window, causing "send on closed channel" panic in Put/Delete. The CommitQueue.Close comment said "Callers must stop submitting before Close" but Put/Delete didn't enforce this. Changes: - wal/writer.go: add submitMu sync.RWMutex. Put/Delete construct entry outside the lock, then hold RLock during writeStopped check + Submit; release before <-req.Result. Close holds write lock during writeStopped.Store + queue.Close, guaranteeing no Submit is in progress when the channel is closed. - wal/writer_test.go: add TestConcurrentPutCloseNoPanic and TestConcurrentDeleteCloseNoPanic. 100 goroutines + 1 closer, recover panics. Run with -count=50 for regression detection. Verified: all existing tests pass. New concurrent tests pass with -count=50 (0 panics). go test -race ./... green. Audit context: docs/audit-3.2.md C7.
The file is empty.