[ShuweiShen772]

Description

When --enable_ha_rebuild_gate=true is enabled on v0.3.12_xllm_patch, the rebuild gate can transition the promoted WrappedMasterService to SERVING while MasterAdminServer remains in leader_warmup.

The /health endpoint then reports service_ready=true but ha_state=leader_warmup. Health checks that require ha_state=serving may consequently treat the active leader as unhealthy and time out or refuse to restart it.

Derive the health snapshot state from the service's actual serving state: while the runtime state is leader_warmup, report serving once the delegated service is serving. The endpoint continues to report leader_warmup while the rebuild gate is closed.

Suggested Merge Priority

• P2 — Normal: Routine bug fix for HA health reporting.

Module

• Mooncake Store

Type of Change

• Bug fix

How Has This Been Tested?

Test commands:

clang-format --dry-run --Werror \
  mooncake-store/src/master_admin_service.cpp \
  mooncake-store/tests/master_admin_server_test.cpp
git diff --check