NealSun96 opened a new issue #1075:
URL: https://github.com/apache/helix/issues/1075


   Previously, the workflow garbage collection logic was removed in fear of 
race conditions (PR: #803 ). As we see value in bringing back workflow garbage 
collection, we are getting rid of the race conditions and bringing back the 
logic. 
   
   Specifically, two items need to be completed:
   1. Avoid direct dependency of garbage collection stage on the cache. We can 
instead deliver the relevant content of the cache into the stage during sync 
time, and use it during async time. This way the race condition with cache is 
no longer an issue. 
   2. We are getting rid of an unnecessary JobConfig write that serves no 
purpose to avoid possible race conditions.  


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