[GitHub] [pulsar] rfuerst87 opened a new issue #4724: New schemas should overwrite deleted schemas

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

rfuerst87 opened a new issue #4724: New schemas should overwrite deleted schemas
URL: https://github.com/apache/pulsar/issues/4724
 
 
   **Describe the bug**
   For what I observed deleting schemas currently just marks a schema deleted rather than actually delete it. Now for some reason schemas are simply ignored writing to a once-existing-but-now-deleted topic. Querying a schema for such a topic always returns a 404. The only workaround I found so far is to manually delete the schema in zookeeper. 
   
   **To Reproduce**
   1. Write some messages to topic `tenant/ns/topic` using an AvroSchema for example
   2. Query schema: `pulsar-admin schemas get persistent://tenant/ns/topic` -> Result ok
   3. Delete topic including schema: `pulsar-admin topics delete persistent://tenant/ns/topic -d`
   4. Again write messages to `tenant/ns/topic` with same AvroSchema as above
   5.  Query schema: `pulsar-admin schemas get persistent://tenant/ns/topic` -> Error 404 Not Found 
   
   **Expected behavior**
   Deleted schemas should be overwritten by new schemas.
   
   **Desktop (please complete the following information):**
    - Pulsar version 2.4.0
   
   **Additional context**
   The same behavior can be observed when a topic is deleted automatically due to inactivity.
   

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