nodece opened a new pull request #13809:
URL: https://github.com/apache/pulsar/pull/13809


   Signed-off-by: Zixuan Liu <[email protected]>
   
   Fixes #13211 
   
   ### Motivation
   
   When a method calls the zk metadata store API, this method will occupy zk 
callback thread, and this method thread will be changed from another 
thread(like web thread)  to the zk callback thread named main-EventGroup.
   
   ### Modifications
   
   - Use `Executors.newCachedThreadPool` executor to call the zk callback
   
   ### Documentation
   
   Need to update docs? 
   
   - [x] `no-need-doc` 
   
   
   


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