On 2021/08/03 11:12:34, Ivan Kelly <iv...@apache.org> wrote:
> > Creating a topic will first check whether the topic already exists.
> > The verification will read all topics under the namespace, and then
> > traverse these topics to see if the topic already exists.
> > When there are a large number of topics under the namespace(about 300,000
> > topics),
> > less than 10 topics can be created in one second.
> Why do we need to read all topics at all? We really just need to check
> whether TOPIC or TOPIC-partition-0 exist.
>
> Even if they do not exist, is there anything to stop one client
> creating TOPIC and another creating TOPIC-partition-0?
>
> -Ivan
>
Such as the test case
"testCreatePartitionedTopicHavingNonPartitionTopicWithPartitionSuffix". Some
non partition topic has the partition suffix. In this case, we can not use the
cache to check anymore. And we have to traverse
