jojochuang opened a new pull request, #7329:
URL: https://github.com/apache/ozone/pull/7329

   ## What changes were proposed in this pull request?
   HDDS-11558. HBase RegionServer crashes due to inconsistency caused by Ozone 
client failover handling
   
   Please describe your PR in detail:
   * Please see the jira for the reproduction steps.
   * This PR proposes to add a check before OM preExecute() step, such that if 
OM (inside its Hadoop RPC handler) receives a request that has been executed 
before, return its cached result.
   
   ## What is the link to the Apache JIRA
   
   https://issues.apache.org/jira/browse/HDDS-11558
   
   ## How was this patch tested?
   
   The reproduction is complex. It involves pausing multiple OMs in specific 
lock steps. So I'm not able to write a test. It might be possible to write 
Docker-based acceptance test to simulate node pause though.
   I manually repeated the steps described in the jira several times to confirm 
the change fixed the problem.


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