{"record":{"id":"8847f0393ae65057","repo":"redis/go-redis","slug":"failed-to-authenticate-w","errorCode":null,"errorMessage":"failed to authenticate: %w","messagePattern":"failed to authenticate: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"redis.go","lineNumber":928,"sourceCode":"\t\t// the server does not support the HELLO command.\n\t\t// The server may be a redis-server that does not support the HELLO command,\n\t\t// or it could be DragonflyDB or a third-party redis-proxy. They all respond\n\t\t// with different error string results for unsupported commands, making it\n\t\t// difficult to rely on error strings to determine all results.\n\t\tcn.GetStateMachine().Transition(pool.StateClosed)\n\t\treturn initErr\n\t} else {\n\t\thelloFallbackToRESP2 = c.opt.Protocol == 3\n\t\tif password != \"\" {\n\t\t\t// Try legacy AUTH command if HELLO failed.\n\t\t\tif username != \"\" {\n\t\t\t\tinitErr = conn.AuthACL(ctx, username, password).Err()\n\t\t\t} else {\n\t\t\t\tinitErr = conn.Auth(ctx, password).Err()\n\t\t\t}\n\t\t\tif initErr != nil {\n\t\t\t\tcn.GetStateMachine().Transition(pool.StateClosed)\n\t\t\t\treturn fmt.Errorf(\"failed to authenticate: %w\", initErr)\n\t\t\t}\n\t\t}\n\t}\n\tif helloFallbackToRESP2 {\n\t\tc.disableCSCServing(ctx, \"HELLO 3 was rejected and the connection negotiated RESP2\")\n\t}\n\n\t// trackingEnabled reports whether THIS pool connection must issue\n\t// CLIENT TRACKING ON during init. True when CSC (SharedTracking) is enabled:\n\t// the shared cache is fed by per-connection tracking + the background\n\t// drainer. Once CSC serving stops (owner Close, GC cleanup, or drainer\n\t// damping), new and re-inited conns skip tracking — nothing consumes the\n\t// pushes into the cache anymore.\n\t// Pipeline-pool connections are excluded from CLIENT TRACKING: pipelined\n\t// commands never consult or populate the client-side cache (only the\n\t// single-command cached path on main-pool connections does), so tracking\n\t// reads made on pipeline connections would only grow the server's tracking\n\t// table and produce invalidation pushes for keys the cache does not hold.","sourceCodeStart":910,"sourceCodeEnd":946,"githubUrl":"https://github.com/redis/go-redis/blob/c5cad058c72f58370553b48566302303cf8a2e89/redis.go#L910-L946","documentation":"Error \"failed to authenticate: %w\" thrown in redis/go-redis.","triggerScenarios":"Thrown at redis.go:928 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"c5cad058c72f58370553b48566302303cf8a2e89","analyzedAt":"2026-09-01T06:50:53.388Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}