lhotari edited a comment on issue #10433:
URL: https://github.com/apache/pulsar/issues/10433#issuecomment-831885032


   When looking more at the possible race condition, the previous explained 
scenario seems to be possible with a slight variation to it. It seems that 
invalidation while the entry is in use is possible, but the remaining steps are 
different. It seems that is would require 2 concurrent invalidations so that 
the problem would manifest itself. 
   
   It might sound like a very unlikely situation, but it seems that the problem 
of this issue is also very rare. With enough operations, a very unlikely call 
path will eventually get executed.


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