[GitHub] [pulsar] merlimat opened a new pull request #5230: Allow for topic deletions with regex consumers

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

merlimat opened a new pull request #5230: Allow for topic deletions with regex consumers
URL: https://github.com/apache/pulsar/pull/5230
 
 
   ### Motivation
   
   Currently it's not possible to delete topics when there is a regex consumer attached to them. The reason is that the regex consumer will immediately reconnect and cause the topic to be re-created.
   
   ### Modifications
   
    * Added a flag in CommandSubscribe so that a regex consumer will never trigger the creation of a topic.
    * Subscribing to a non-existing topic, will give a specific error, that the consumer will interpret as a permanent failure and thus will stop retrying.
   

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