nsivabalan opened a new pull request, #13064:
URL: https://github.com/apache/hudi/pull/13064

   ### Change Logs
   
   - If there are two concurrent rollback planning by 2 concurrent writers, 
each could write two rollback plans to timeline. We are fixing that in this 
patch. Also, following up on https://github.com/apache/hudi/pull/11580, we are 
adding locks to rollback planning as well. 
   This is targetted against 0.x branch. 
   
   ### Impact
   
   Robust rollback planning even in the event of concurrent writers/planners.
   
   ### Risk level (write none, low medium or high below)
   
   low
   
   ### Documentation Update
   
   _Describe any necessary documentation update if there is any new feature, 
config, or user-facing change. If not, put "none"._
   
   - _The config description must be updated if new configs are added or the 
default value of the configs are changed_
   - _Any new feature or user-facing change requires updating the Hudi website. 
Please create a Jira ticket, attach the
     ticket number here and follow the 
[instruction](https://hudi.apache.org/contribute/developer-setup#website) to 
make
     changes to the website._
   
   ### Contributor's checklist
   
   - [ ] Read through [contributor's 
guide](https://hudi.apache.org/contribute/how-to-contribute)
   - [ ] Change Logs and Impact were stated clearly
   - [ ] Adequate tests were added if applicable
   - [ ] CI passed
   


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