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xiaoxia-saas/apps/worker/worker_app/tasks/_startup.py
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feat(cleanup): pending 任务自动清理,防止队列占满 (#1463)
2026-08-23 12:55:39 +08:00

151 lines
5.5 KiB
Python

"""Worker 启动时的初始化任务 — 孤儿任务清理等."""
import logging
from celery.signals import worker_ready
from worker_app.db import SessionLocal
logger = logging.getLogger(__name__)
# 孤儿任务超时阈值:渲染任务超过此时间未更新则视为卡死
ORPHAN_TASK_TIMEOUT_MINUTES = 10
# Pending 任务超时阈值:pending 任务在队列中等待超过此时间则自动清理
PENDING_TASK_TIMEOUT_MINUTES = 30
def cleanup_orphan_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> int: # pragma: no cover
"""清理数据库中超时未更新的 running GenerationTask(孤儿任务)。
worker 重启或崩溃后,之前处于 running 状态的任务会变成孤儿任务,
一直卡在 running 不动。通过 updated_at 超时判断并标记为 failed。
Args:
timeout_minutes: 超时时间(分钟),默认 10 分钟
Returns:
清理的任务数量
"""
from packages.adapters.sqlalchemy_impl.generation_task_repository import (
SQLAlchemyGenerationTaskRepository,
)
try:
session = SessionLocal()
repo = SQLAlchemyGenerationTaskRepository(session)
count = repo.cleanup_stale_running(timeout_minutes)
session.close()
if count > 0:
logger.warning("清理了 %d 个超时的孤儿 GenerationTask(超过 %d 分钟未更新)", count, timeout_minutes)
else:
logger.info("无孤儿 GenerationTask 需要清理")
return count
except Exception as e:
logger.error("清理孤儿 GenerationTask 失败: %s", e, exc_info=True)
return 0
def cleanup_stale_jobs(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> int: # pragma: no cover
"""清理数据库中超时未更新的 running Job(孤儿任务)。
与 cleanup_orphan_tasks 配合,同时清理 Job 表和 GenerationTask 表。
Returns:
清理的任务数量
"""
from datetime import datetime, timedelta, timezone
from packages.adapters.sqlalchemy_impl.models import JobModel
from packages.domain.job import JobStatus
try:
session = SessionLocal()
cutoff = datetime.now(timezone.utc) - timedelta(minutes=timeout_minutes)
stale_jobs = (
session.query(JobModel)
.filter(
JobModel.status == JobStatus.RUNNING.value,
JobModel.updated_at < cutoff,
)
.all()
)
count = 0
for model in stale_jobs:
model.status = JobStatus.FAILED.value
model.error_message = f"任务执行中断(超过 {timeout_minutes} 分钟未更新)"
count += 1
if count > 0:
session.commit()
logger.warning("清理了 %d 个超时的孤儿 Job(超过 %d 分钟未更新)", count, timeout_minutes)
else:
logger.info("无孤儿 Job 需要清理")
session.close()
return count
except Exception as e:
logger.error("清理孤儿 Job 失败: %s", e, exc_info=True)
return 0
def cleanup_stale_pending_tasks(timeout_minutes: int = PENDING_TASK_TIMEOUT_MINUTES) -> int: # pragma: no cover
"""清理数据库中卡在 pending 状态超时的 GenerationTask。
全局任务队列有 pending 数量上限,长期卡在 pending 的任务会占满队列,
导致新用户无法创建任务。通过 created_at 超时判断并标记为 failed。
Args:
timeout_minutes: 超时时间(分钟),默认 PENDING_TASK_TIMEOUT_MINUTES
Returns:
清理的任务数量
"""
from packages.adapters.sqlalchemy_impl.generation_task_repository import (
SQLAlchemyGenerationTaskRepository,
)
session = SessionLocal()
try:
repo = SQLAlchemyGenerationTaskRepository(session)
count = repo.cleanup_stale_pending(timeout_minutes)
if count > 0:
logger.warning("清理了 %d 个超时的 pending GenerationTask(超过 %d 分钟未处理)", count, timeout_minutes)
else:
logger.info("无超时 pending GenerationTask 需要清理")
return count
except Exception as e:
logger.error("清理超时 pending GenerationTask 失败: %s", e, exc_info=True)
return 0
finally:
session.close()
def cleanup_all_stale_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> dict: # pragma: no cover
"""统一清理所有超时的孤儿任务。
同时清理 GenerationTask 和 Job 两类表。
Returns:
{"generation_tasks": int, "jobs": int}
"""
gen_count = cleanup_orphan_tasks(timeout_minutes)
job_count = cleanup_stale_jobs(timeout_minutes)
pending_count = cleanup_stale_pending_tasks(PENDING_TASK_TIMEOUT_MINUTES)
total = gen_count + job_count + pending_count
if total > 0:
logger.warning(
"任务清理完成: 孤儿 GenerationTask=%d, 孤儿 Job=%d, 超时 pending=%d, 总计=%d",
gen_count,
job_count,
pending_count,
total,
)
return {"generation_tasks": gen_count, "jobs": job_count, "pending": pending_count}
@worker_ready.connect
def _on_worker_ready(sender, **kwargs): # pragma: no cover
"""Worker 启动完成后执行 — 清理孤儿任务。"""
logger.info("Worker 启动完成,开始清理孤儿 running 任务...")
result = cleanup_all_stale_tasks()
total = result["generation_tasks"] + result["jobs"]
logger.info("Worker 启动清理完成,共清理 %d 个孤儿任务", total)