[GitHub] [pulsar] BewareMyPower commented on pull request #18594: [improve][broker] Add an option to return 0 when querying partitions of a nonexistent topic

[GitBox <gi...@apache.org>]

BewareMyPower commented on PR #18594:
URL: https://github.com/apache/pulsar/pull/18594#issuecomment-1326060550

   This PR also fixes the incompatibility issue of `allowAutoTopicCreationType`. Adding the following configs to run a standalone of 2.7.5.
   
   ```properties
   allowAutoTopicCreationType=partitioned
   defaultNumPartitions=4
   ```
   
   Then producing a message to a topic named "my-topic", you can see the created topic is still non-partitioned.
   
   ```bash
   $ ./bin/pulsar-admin topics list public/default
   "persistent://public/default/my-topic"
   ```
   
   However, with the standalone that includes this patch.
   
   ```properties
   checkTopicExistsWhenQueryPartitions=false
   allowAutoTopicCreationType=partitioned
   defaultNumPartitions=4
   ```
   
   The created topic is a partitioned topic:
   
   ```bash
   $ ./bin/pulsar-admin topics list public/default
   "persistent://public/default/my-topic-partition-0"
   "persistent://public/default/my-topic-partition-3"
   "persistent://public/default/my-topic-partition-1"
   "persistent://public/default/my-topic-partition-2"
   ```


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