{"record":{"id":"75f6602bc2f06554","repo":"googleapis/mcp-toolbox","slug":"unable-to-create-connection-client-w","errorCode":null,"errorMessage":"unable to create connection client: %w","messagePattern":"unable to create connection client: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/sources/falkordb/falkordb.go","lineNumber":129,"sourceCode":"\t//nolint:all // Reassigned ctx\n\tctx, span := sources.InitConnectionSpan(ctx, tracer, SourceType, r.Name)\n\tdefer span.End()\n\n\topts := &falkordb.ConnectionOption{\n\t\tAddr:     net.JoinHostPort(r.Host, r.Port),\n\t\tUsername: r.Username,\n\t\tPassword: r.Password,\n\t}\n\tif r.TLS.Enabled {\n\t\topts.TLSConfig = &tls.Config{\n\t\t\tMinVersion:         tls.VersionTLS12,\n\t\t\tInsecureSkipVerify: r.TLS.InsecureSkipVerify,\n\t\t}\n\t}\n\n\tclient, err := falkordb.FalkorDBNew(opts)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"unable to create connection client: %w\", err)\n\t}\n\treturn client, nil\n}\n\nvar _ sources.Source = &Source{}\n\ntype Source struct {\n\tConfig\n\tClient *falkordb.FalkorDB\n}\n\nfunc (s *Source) IsReadOnly() bool {\n\treturn false\n}\n\nfunc (s *Source) SourceType() string {\n\treturn SourceType\n}","sourceCodeStart":111,"sourceCodeEnd":147,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/internal/sources/falkordb/falkordb.go#L111-L147","documentation":"initFalkorDBClient returns this when falkordb.FalkorDBNew(opts) fails to construct the connection client; Initialize then re-wraps it as 'unable to create client'. It covers errors raised while setting up the Redis-protocol client (options parsing, network setup).","triggerScenarios":"Invalid ConnectionOption (malformed Addr from net.JoinHostPort, bad TLS config), or FalkorDBNew failing during dial/address resolution at construction time.","commonSituations":"Malformed host/port values in tools.yaml; IPv6 hosts combined with odd port strings; TLS options the client library rejects; internal falkordb-go version incompatibilities.","solutions":["Check the wrapped %w error from FalkorDBNew for the precise cause","Validate host and port fields in tools.yaml (port as a numeric string)","Ensure the address is resolvable from the machine running the toolbox","Verify the falkordb-go v2 client version matches your deployment"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"// Go: validate options the way FalkorDBNew will consume them\naddr := net.JoinHostPort(cfg.Host, cfg.Port)\nif cfg.Host == \"\" {\n    return fmt.Errorf(\"falkordb host is required\")\n}\nif p, err := strconv.Atoi(cfg.Port); err != nil || p <= 0 || p > 65535 {\n    return fmt.Errorf(\"falkordb port %q is not a valid port number\", cfg.Port)\n}","typeGuard":null,"tryCatchPattern":"// Go: surface the wrapped cause\nclient, err := initFalkorDBClient(ctx, tracer, cfg)\nif err != nil {\n    slog.ErrorContext(ctx, \"falkordb client construction failed\", \"cause\", err)\n    return err\n}","preventionTips":["Validate host/port fields in tools.yaml before startup","Ensure hostnames resolve from the toolbox's runtime environment","Pin a compatible falkordb-go v2 client version","Confirm TLS options only when tls.enabled is true"],"tags":["falkordb","client-init","network","configuration"],"backgroundTag":"client-initialization-failed","analyzedSha":"8cc6e09de2ad7b8bffc77751799585a1401a48eb","analyzedAt":"2026-09-05T01:10:36.887Z","contentChangedAt":"2026-09-05T01:10:36.887Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}