fix

pkg/channels/manager.go

@@ -21,6 +21,7 @@ type Manager struct {
 	bus          *bus.MessageBus
 	config       *config.Config
 	dispatchTask *asyncTask
+	dispatchSem  chan struct{}
 	mu           sync.RWMutex
 }
 
@@ -33,6 +34,8 @@ func NewManager(cfg *config.Config, messageBus *bus.MessageBus) (*Manager, error
 		channels: make(map[string]Channel),
 		bus:      messageBus,
 		config:   cfg,
+		// Limit concurrent outbound sends to avoid unbounded goroutine growth.
+		dispatchSem: make(chan struct{}, 32),
 	}
 
 	if err := m.initChannels(); err != nil {
@@ -239,11 +242,13 @@ func (m *Manager) dispatchOutbound(ctx context.Context) {
 				continue
 			}
 
-			// 使用 goroutine 实现并发消息分发，避免单个通道延迟阻塞全局 dispatcher
-			go func(c Channel, m bus.OutboundMessage) {
-				if err := c.Send(ctx, m); err != nil {
+			// Bound fan-out concurrency to prevent goroutine explosion under burst traffic.
+			m.dispatchSem <- struct{}{}
+			go func(c Channel, outbound bus.OutboundMessage) {
+				defer func() { <-m.dispatchSem }()
+				if err := c.Send(ctx, outbound); err != nil {
 					logger.ErrorCF("channels", "Error sending message to channel", map[string]interface{}{
-						"channel": m.Channel,
+						"channel": outbound.Channel,
 						"error":   err.Error(),
 					})
 				}