grpc type_error ai_generated true

INTERNAL: grpc: failed to unpack Any type: type URL not found in registry

ID: grpc/protobuf-any-type-mismatch

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
1Evidence
2024-02-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
protobuf 3.20+ active — — —
gRPC Go 1.50+ active — — —
gRPC Java 1.60+ active — — —

Root Cause

A protobuf Any field contains a type URL that is not registered in the server's or client's protobuf descriptor registry, often due to missing proto imports or mismatched versions.

generic

中文

protobuf Any字段包含的类型URL未在服务器或客户端的protobuf描述符注册表中注册，通常是由于缺少proto导入或版本不匹配。

Official Documentation

https://protobuf.dev/programming-guides/proto3/#any

Workarounds

  1. 90% success Register the missing type on server startup. In Go: import "google.golang.org/protobuf/reflect/protoreflect" and use proto.RegisterFile(descriptor) or ensure the proto file is imported in the main package. Example: _ "path/to/missing/proto" 
    Register the missing type on server startup. In Go: import "google.golang.org/protobuf/reflect/protoreflect" and use proto.RegisterFile(descriptor) or ensure the proto file is imported in the main package. Example: _ "path/to/missing/proto"
  2. 85% success Use a custom Any unpacker that fetches descriptors dynamically. In Python: from google.protobuf import any_pb2; from google.protobuf import symbol_database; db = symbol_database.Default(); msg = db.GetSymbol(type_url); any.Unpack(msg) 
    Use a custom Any unpacker that fetches descriptors dynamically. In Python: from google.protobuf import any_pb2; from google.protobuf import symbol_database; db = symbol_database.Default(); msg = db.GetSymbol(type_url); any.Unpack(msg)

中文步骤

  1. Register the missing type on server startup. In Go: import "google.golang.org/protobuf/reflect/protoreflect" and use proto.RegisterFile(descriptor) or ensure the proto file is imported in the main package. Example: _ "path/to/missing/proto"
  2. Use a custom Any unpacker that fetches descriptors dynamically. In Python: from google.protobuf import any_pb2; from google.protobuf import symbol_database; db = symbol_database.Default(); msg = db.GetSymbol(type_url); any.Unpack(msg)

Dead Ends

Common approaches that don't work:

  1. Manually parsing the type URL string 50% fail

    The Any type requires proper protobuf reflection; manual parsing is error-prone and may break with future protobuf versions.

  2. Adding all possible proto files to the binary 30% fail

    Increases binary size and may cause symbol conflicts.