mumrah opened a new pull request, #22442:
URL: https://github.com/apache/kafka/pull/22442

   Instead of changing `Uuid#randomUuid` to always have the new behavior 
introduced in #21313, this patch adds a separate `randomUuidNoDashes` method. 
   
   Since Uuid is a utility class, it is used widely throughout the broker and 
client (possibly even applications). In most cases, the presence of a dash is 
inconsequential. The new behavior, which comes with a small performance hit, 
should not affect these callers. The introduction of a new Uuid factory makes 
the new behavior opt-in.
   
   One caller is updated to use the new factory which is where the controller 
allocates topic IDs. This matches the intention of the original Jira.


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