可以订阅的PubSub主题数量是否有限制？

I have created a dataflow with ~30 pipelines all of which subscribe to their own topics on PubSub. When I try to launch, a random subscription always fails. However if I split my pipelines between several dataflows all the subscriptions are successful.

我创建了一个包含~30个管道的数据流，所有这些管道都在PubSub上订阅了他们自己的主题。当我尝试启动时，随机订阅总是失败。但是，如果我在多个数据流之间拆分管道，则所有订阅都会成功。

Is there a limit to the number of topics a single dataflow can sub to or the number concurrent subscription requests that can be made?

单个数据流可以提交的主题数量是否有限制，或者可以进行的并发订阅请求数量是否有限制？

Failing job: 2016-06-03_07_27_29-2535656819775551181

失败的工作：2016-06-03_07_27_29-2535656819775551181

One of the succesful ones: 2016-06-03_07_37_20-7740562448710226511

其中一个成功的：2016-06-03_07_37_20-7740562448710226511

2 个解决方案

#1

Dataflow has a known bug that causes subscription creation to be flaky; we are working on fixing it. In the meantime, launching pipelines with fewer pubsub inputs should be less likely to exhibit the issue.

Dataflow有一个已知的错误，导致订阅创建不稳定;我们正在努力修复它。与此同时，启动具有较少pubsub输入的管道应该不太可能出现问题。

#2

The limits of topics per project and subscriptions per project are defined here. Dataflow does not enforce additional quotas; you can see details here.

此处定义每个项目的主题限制和每个项目的订阅。数据流不会强制执行其他配额;你可以在这里看到细节。