yyqdbngt opened a new issue, #2195:
URL: https://github.com/apache/rocketmq-dashboard/issues/2195

   ## Problem
   
   `TencentClientFactory` creates cached SDK clients with 
`ConcurrentHashMap.computeIfAbsent`, while credential updates invalidate cached 
entries by scanning the map keys.
   
   If invalidation runs while a client is still being created, the invalidation 
can finish before the new mapping is visible. The client built from the 
previous credential is then inserted after invalidation and remains cached for 
later requests.
   
   ## Expected behavior
   
   Once credential invalidation returns, an in-flight cache miss must not be 
able to install a client created before that invalidation. Existing cache hits 
should remain inexpensive.
   
   ## Scope
   
   Coordinate cache-miss creation with credential invalidation and add a 
deterministic concurrency regression test.


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