Gooch0922 opened a new pull request, #534:
URL: https://github.com/apache/ranger/pull/534

   … version changes in scenarios with many plugin clients
   
   ## What changes were proposed in this pull request?
   
   The purpose of this change is to address the issue of redundant role cache 
modifications in concurrent scenarios, as described in [ranger - 5148]. After 
acquiring the lock, a check is performed to determine whether the role version 
number in the cache is already greater than or equal to the version number 
retrieved from the database. If this condition evaluates to true, the cached 
data can be directly returned.
   
   ## How was this patch tested?
   
   I manually tested this patch. Through means like debugging and with the help 
of tools such as JMeter, I simulated concurrent request scenarios. In these 
scenarios, threads competing for the lock will either directly access the cache 
or print the contents of the patch in the debug logs.
   


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