[GitHub] [pulsar] shibd commented on pull request #15139: [fix][broker]Fix create topic fail deadlock

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

shibd commented on PR #15139:
URL: https://github.com/apache/pulsar/pull/15139#issuecomment-1097939550

   In order to avoid the same problem, do we need to improve `ConcurrentOpenHashMap`?
   
   In `ConcurrentHashMap`, The same operation throws an exception, which makes it easier to spot the problem.
   
   For example below:
   ```        
   Map<String, String> map = new ConcurrentHashMap<>();
   
   map.computeIfAbsent("test", (key) -> {
       map.remove("test");
       return "ok";
   });
   ```
   
   It will throw `java.lang.IllegalStateException: Recursive update`


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