在 Google App Engine 开发服务器中组合 --backends 和事务任务队列时出现问题？

发布于 2024-12-27 18:40:55 字数 583 浏览 2 评论 0原文

我正在将相当大的 App Engine 应用程序上的一些功能移动到后端，突然在通过 dev_appserver.py 运行时使用事务的地方开始出现许多错误：

ApplicationError: ApplicationError: 10001 Transaction(<handle: 0x1, app: "dev~MYAPPNAME", >) not found

我意识到只有当我通过以下方式运行应用程序时才会出现问题： --后端。我猜测问题的发生是因为我有一个事务使用“transactional=True”将任务添加到队列中，即：

def txn():

    # make model changes

    taskqueue.add(url='/models/processupdate', params=my_params, transactional=True, queue_name='not_the_default_q')
  db.run_in_transaction(txn)

这是 dev_appserver 的“单线程”性质的结果？有解决办法吗？

原文

I was moving some functionality on a fairly sizeable App Engine application to a backend, and suddenly started getting a number of errors in places where I was using transactions while running via dev_appserver.py:

ApplicationError: ApplicationError: 10001 Transaction(<handle: 0x1, app: "dev~MYAPPNAME", >) not found

I realized the problem only occurs when I run the app via --backends. And I'm guessing the problem is occurring because I have a transaction that adds a task to a queue using "transactional=True", i.e.:

def txn():

    # make model changes

    taskqueue.add(url='/models/processupdate', params=my_params, transactional=True, queue_name='not_the_default_q')
  db.run_in_transaction(txn)

Is this a result of the 'single threaded' nature of dev_appserver? Is there a work around for this?

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