mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2026-09-05 23:57:10 +00:00
Chris Lu
ccc0a20dbf
Critical fix for gRPC port allocation safety across multiple services: Problem: When multiple services need gRPC port fallback allocation in sequence (e.g., Master gRPC unavailable → finds alternative, then Filer gRPC unavailable → searches from calculated port), there was no tracking of previously allocated gRPC ports. This could allow two services to claim the same port. Scenario that is now prevented: - Master gRPC: calculated 19333 unavailable → finds 19334 → assigns 19334 - Filer gRPC: calculated 18888 unavailable → searches from 18889, might land on 19334 if consecutive ports in range are unavailable (especially with custom port configurations or in high-port-contention environments) Solution: - Add allocatedGrpcPorts map to track gRPC ports allocated within the function - Check allocatedGrpcPorts before using calculated port for each service - Pass allocatedGrpcPorts to findAvailablePortOnIP when finding fallback ports - Add allocatedGrpcPorts[port] = true after each successful allocation - This ensures no two services can allocate the same gRPC port The fix handles both: 1. Calculated gRPC ports (when grpcPort == 0) 2. Explicitly set gRPC ports (when user provides -service.port.grpc value) While default port spacing makes collision unlikely, this fix is essential for: - Custom port configurations - High-contention environments - Edge cases with many unavailable consecutive ports - Correctness and safety guarantees