go-redis/redis · error

csc: a different "invalidate" push handler is already regist

Error message

csc: a different "invalidate" push handler is already registered

What it means

Error "csc: a different "invalidate" push handler is already registered" thrown in go-redis/redis.

Source

Thrown at csc_integration.go:156

	return typ == reflect.TypeOf(b) && typ.Comparable() && a == b
}

func isNilCache(cache Cache) bool {
	if cache == nil {
		return true
	}
	v := reflect.ValueOf(cache)
	switch v.Kind() {
	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
		return v.IsNil()
	default:
		return false
	}
}

// errInvalidateHandlerBound: piggybacking on a handler bound to a live
// different cache would leave the new cache uninvalidated.
var errInvalidateHandlerBound = errors.New(`csc: a different "invalidate" push handler is already registered`)

// bindTo binds the handler to (cache, keyPrefix). Success when that is already the
// binding (a derived Client.Conn sharing the parent's processor and cache) or
// when the handler was released by a previous owner's teardown (rebind);
// errInvalidateHandlerBound otherwise.
func (h *invalidateHandler) bindTo(cache Cache, keyPrefix string) error {
	h.mu.Lock()
	defer h.mu.Unlock()
	switch {
	case sameCache(h.cache, cache) && h.keyPrefix == keyPrefix:
		h.users++
		return nil
	case h.cache == nil:
		h.cache, h.keyPrefix = cache, keyPrefix
		h.users = 1
		return nil
	default:
		return errInvalidateHandlerBound

View on GitHub (pinned to 36d97525cd)

Solutions

1. Unregister the existing "invalidate" push handler before registering a new one
2. Reuse the already-registered handler instead of registering a replacement

When it happens

Trigger: Thrown at csc_integration.go:156 when the library encounters an invalid state.

Common situations: Centralize push handler registration behind a sync.Once-style guard to prevent double registration.

AI-assisted analysis of go-redis/redis@36d97525cd (2026-08-06). Data as JSON: /data/errors/ac2f7f71a7eb4636.json. Report an issue: GitHub.