Reopen closed fabric peer sessions

agents/rap-node-agent/internal/mesh/fabric_session_manager.go

@@ -35,8 +35,12 @@ func (m *FabricSessionPeerManager) Get(ctx context.Context, target FabricSession
 	}
 	m.mu.Lock()
 	if pump := m.sessions[key]; pump != nil {
-		m.mu.Unlock()
-		return pump, nil
+		if pump.Closed() {
+			delete(m.sessions, key)
+		} else {
+			m.mu.Unlock()
+			return pump, nil
+		}
 	}
 	m.mu.Unlock()
 
@@ -48,9 +52,13 @@ func (m *FabricSessionPeerManager) Get(ctx context.Context, target FabricSession
 
 	m.mu.Lock()
 	if existing := m.sessions[key]; existing != nil {
-		m.mu.Unlock()
-		_ = pump.Close()
-		return existing, nil
+		if existing.Closed() {
+			delete(m.sessions, key)
+		} else {
+			m.mu.Unlock()
+			_ = pump.Close()
+			return existing, nil
+		}
 	}
 	if m.sessions == nil {
 		m.sessions = map[string]*FabricSessionPump{}