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fix(dashboard): keep status responsive when session db locks

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This commit is contained in:
yoma 2026-07-04 19:30:10 +08:00
parent 09693cd3a3
commit a3454dd15d
2 changed files with 80 additions and 16 deletions
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58
hermes_cli/web_server.py
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@ -1100,6 +1100,8 @@ except (ValueError, TypeError):
)
_GATEWAY_HEALTH_TIMEOUT = 3.0
_STATUS_ACTIVE_SESSIONS_TIMEOUT = 0.75
# DEPRECATED (scheduled for removal): GATEWAY_HEALTH_URL / GATEWAY_HEALTH_TIMEOUT.
# Cross-container / cross-host gateway liveness detection will be folded into a
# first-class dashboard config key so it's no longer Docker-adjacent lore buried
@ -1150,6 +1152,45 @@ def _probe_gateway_health() -> tuple[bool, dict | None]:
return False, None
def _count_status_active_sessions() -> int:
"""Return the dashboard status active-session count.
This is best-effort status garnish, not a critical path. Use a read-only
connection so /api/status never tries to initialise or migrate state.db
while another Hermes process is writing to it.
"""
from hermes_state import SessionDB
db = SessionDB(read_only=True)
try:
sessions = db.list_sessions_rich(limit=50)
now = time.time()
return sum(
1 for s in sessions
if s.get("ended_at") is None
and (now - s.get("last_active", s.get("started_at", 0))) < 300
)
finally:
db.close()
async def _status_active_sessions() -> int:
loop = asyncio.get_running_loop()
try:
return await asyncio.wait_for(
loop.run_in_executor(None, _count_status_active_sessions),
timeout=_STATUS_ACTIVE_SESSIONS_TIMEOUT,
)
except asyncio.TimeoutError:
_log.debug(
"/api/status active session count exceeded %.2fs; returning 0",
_STATUS_ACTIVE_SESSIONS_TIMEOUT,
)
except Exception as exc:
_log.debug("/api/status active session count unavailable: %s", exc)
return 0
# Image MIME types this endpoint will serve. Extension-allowlisted so an
# authenticated caller can't pull non-image files through it.
_MEDIA_CONTENT_TYPES = {
@ -2264,22 +2305,7 @@ async def get_status(profile: Optional[str] = None):
if gateway_running and gateway_state is None and remote_health_body is not None:
gateway_state = "running"
active_sessions = 0
try:
from hermes_state import SessionDB
db = SessionDB()
try:
sessions = db.list_sessions_rich(limit=50)
now = time.time()
active_sessions = sum(
1 for s in sessions
if s.get("ended_at") is None
and (now - s.get("last_active", s.get("started_at", 0))) < 300
)
finally:
db.close()
except Exception:
pass
active_sessions = await _status_active_sessions()
# Busy/drainable readout (NAS lifecycle-safety gate). active_agents is
# the in-flight gateway-turn count the gateway now persists at every