[PR] KAFKA-19899: Bumping group epoch when member regex subscription changes from non empty to empty [kafka]

[via GitHub]

AntonVasant opened a new pull request, #21075:
URL: https://github.com/apache/kafka/pull/21075

   This patch fixes a case in GroupMetadataManager where a member’s
   regular expression subscription transitions from a non-empty regex
   to an empty regex. In this scenario, maybeUpdateRegularExpressions
   should return true so that the group epoch is bumped.
   
   
[https://issues.apache.org/jira/projects/KAFKA/issues/KAFKA-19899?filter=allissues](url)
   
   Target branch: 4.1
   


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