abhishekrb19 opened a new pull request, #16684:
URL: https://github.com/apache/druid/pull/16684

   Currently, when retrieving an Avro schema from the registry and if the 
request fails with an `IOException` or a `RestClientException`, we bubble this 
generic error up to the user:
   
   ```
   "Failed to fetch Avro schema id[233323] from registry. Check if the schema 
exists in the registry. Otherwise it
   could mean that there is malformed data in the stream or data that doesn't 
conform to the schema"
   specified."
   ```
   
   However, this error message is however misleading in cases where the rest 
client is throwing unauthorized/forbidden error codes.  So we now handle 
`IOException` and `RestClientException` separately so that we can bubble up 
more specific errors rather than the common template.
   
   Added unit tests for the change and also cleaned up test annotations 
`@Test(expected = ParseException.class)` by adding better tests assertions.
   
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   This PR has:
   
   - [x] been self-reviewed.
   - [x] added unit tests or modified existing tests to cover new code paths, 
ensuring the threshold for [code 
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