{"record":{"id":"82473f0a536c0eed","repo":"apache/beam","slug":"unable-to-convert-logicaltype-v-using-provider-for-v","errorCode":null,"errorMessage":"unable to convert LogicalType[%v] using provider for %v","messagePattern":"unable to convert LogicalType\\[(.+?)\\] using provider for (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"sdks/go/pkg/beam/core/runtime/graphx/schema/schema.go","lineNumber":234,"sourceCode":"\t}\n\tseen[ut] = struct{}{}\n\n\t// Lets do some recursion to register fundamental type parts.\n\tt := ut\n\tif lID, ok := r.logicalTypeIdentifiers[t]; ok {\n\t\tlt := r.logicalTypes[lID]\n\t\tr.addToMaps(lt.StorageType(), t)\n\t\treturn nil\n\t}\n\n\tfor _, lti := range r.logicalTypeInterfaces {\n\t\tif !t.Implements(lti) {\n\t\t\tcontinue\n\t\t}\n\t\tp := r.logicalTypeProviders[lti]\n\t\tst, err := p(t)\n\t\tif err != nil {\n\t\t\treturn errors.Wrapf(err, \"unable to convert LogicalType[%v] using provider for %v\", t, lti)\n\t\t}\n\t\tif st == nil {\n\t\t\tcontinue\n\t\t}\n\t\tr.RegisterLogicalType(ToLogicalType(t.String(), t, st))\n\t\tr.addToMaps(st, t)\n\t\treturn nil\n\t}\n\n\tswitch t.Kind() {\n\tcase reflect.Map:\n\t\tif err := r.registerType(t.Key(), seen); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tfallthrough\n\tcase reflect.Array, reflect.Slice, reflect.Ptr:\n\t\tif err := r.registerType(t.Elem(), seen); err != nil {\n\t\t\treturn errors.Wrapf(err, \"type is of kind %v\", t.Kind())","sourceCodeStart":216,"sourceCodeEnd":252,"githubUrl":"https://github.com/apache/beam/blob/12126d8942aaf848030c478b4c6a28c6af861c66/sdks/go/pkg/beam/core/runtime/graphx/schema/schema.go#L216-L252","documentation":"registerType checks whether a type implements any registered LogicalType interface and, if so, invokes the corresponding provider function to convert it. If the provider returns an error, this error wraps it, naming the logical type and the provider interface.","triggerScenarios":"Registering a type that implements a registered logical-type interface whose provider callback p(t) fails — e.g. a custom logical type provider that cannot handle the specific type instance.","commonSituations":"User-registered logical type providers with incomplete handling logic; version mismatches where a provider expects a different underlying type shape; nil or misconfigured providers.","solutions":["Fix the logical type provider registered for that interface so it handles the type t or returns a nil schema to skip.","Return (nil, nil) from the provider for types it does not support instead of an error.","Check provider registration order and that the right provider is associated with the interface."],"exampleFix":"// before\nfunc provider(t reflect.Type) (*schema.Schema, error) { return nil, errors.New(\"unsupported\") }\n// after\nfunc provider(t reflect.Type) (*schema.Schema, error) {\n    if !supported(t) { return nil, nil } // skip, don't error\n    ...","handlingStrategy":"fallback","validationCode":"if !t.Implements(logicalTypeIface) {\n    return nil, nil // skip instead of erroring\n}","typeGuard":null,"tryCatchPattern":"if err != nil {\n    if strings.Contains(err.Error(), \"unable to convert LogicalType\") {\n        // fall back to RegisterLogicalType with a default representation\n    }\n}","preventionTips":["Make logical type providers tolerant: return nil for unsupported types","Cover every registered interface in provider switch logic","Unit-test providers against all registered logical types"],"tags":["go","beam","schema","logical-type"],"backgroundTag":"type-conversion-failed","analyzedSha":"12126d8942aaf848030c478b4c6a28c6af861c66","analyzedAt":"2026-09-13T01:50:10.254Z","contentChangedAt":"2026-09-13T01:50:10.254Z","schemaVersion":2},"datasetVersion":"2026-09-20T03:17:13.778Z"}