{"id":"ac2f7f71a7eb4636","repo":"go-redis/redis","slug":"csc-a-different-invalidate-push-handler-is-alre","errorCode":null,"errorMessage":"csc: a different \"invalidate\" push handler is already registered","messagePattern":"csc: a different \"invalidate\" push handler is already registered","errorType":"error_code","errorClass":null,"httpStatus":null,"severity":"error","filePath":"csc_integration.go","lineNumber":156,"sourceCode":"\treturn typ == reflect.TypeOf(b) && typ.Comparable() && a == b\n}\n\nfunc isNilCache(cache Cache) bool {\n\tif cache == nil {\n\t\treturn true\n\t}\n\tv := reflect.ValueOf(cache)\n\tswitch v.Kind() {\n\tcase reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:\n\t\treturn v.IsNil()\n\tdefault:\n\t\treturn false\n\t}\n}\n\n// errInvalidateHandlerBound: piggybacking on a handler bound to a live\n// different cache would leave the new cache uninvalidated.\nvar errInvalidateHandlerBound = errors.New(`csc: a different \"invalidate\" push handler is already registered`)\n\n// bindTo binds the handler to (cache, keyPrefix). Success when that is already the\n// binding (a derived Client.Conn sharing the parent's processor and cache) or\n// when the handler was released by a previous owner's teardown (rebind);\n// errInvalidateHandlerBound otherwise.\nfunc (h *invalidateHandler) bindTo(cache Cache, keyPrefix string) error {\n\th.mu.Lock()\n\tdefer h.mu.Unlock()\n\tswitch {\n\tcase sameCache(h.cache, cache) && h.keyPrefix == keyPrefix:\n\t\th.users++\n\t\treturn nil\n\tcase h.cache == nil:\n\t\th.cache, h.keyPrefix = cache, keyPrefix\n\t\th.users = 1\n\t\treturn nil\n\tdefault:\n\t\treturn errInvalidateHandlerBound","sourceCodeStart":138,"sourceCodeEnd":174,"githubUrl":"https://github.com/go-redis/redis/blob/36d97525cd8076aed67cddf54778e9ea84550929/csc_integration.go#L138-L174","documentation":"Error \"csc: a different \"invalidate\" push handler is already registered\" thrown in go-redis/redis.","triggerScenarios":"Thrown at csc_integration.go:156 when the library encounters an invalid state.","commonSituations":"Centralize push handler registration behind a sync.Once-style guard to prevent double registration.","solutions":["Unregister the existing \"invalidate\" push handler before registering a new one","Reuse the already-registered handler instead of registering a replacement"],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"36d97525cd8076aed67cddf54778e9ea84550929","analyzedAt":"2026-08-06T01:08:27.376Z","schemaVersion":2}