tree c9f6716cb2b27abcf03721e5d8b2a2c681c15ce9
parent 017e8145a0186f00d23b4226381d1d5b747de7d8
author Yong Zhang <zhangyong1025.zy@gmail.com> 1640258843 +0800
committer GitHub <noreply@github.com> 1640258843 +0800
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Fixes the NPE in system topics policies service (#13469)

---

*Motivation*

The `namespaceEventsSystemTopicFactory` is created when you will
use it. But the `createSystemTopicFactoryIfNeeded()` may failed
which will cause the `namespaceEventsSystemTopicFactory` is null
and throw a NPE error from the method.

*Modifications*

- throw the error and failed the method when there has exceptions in
`createSystemTopicFactoryIfNeeded()`