hanishakoneru opened a new pull request #1002:
URL: https://github.com/apache/hadoop-ozone/pull/1002


   ## What changes were proposed in this pull request?
   
   When a follower OM needs to replace its DB with a checkpoint from Leader (to 
catch up on the transactions), it should pause or stop services which read/ 
write to the DB. 
   
   During OM HA testing, found that OM could crash with JVM error on RocksDB. 
This happened because KeyDeletingService was trying to access a memory which is 
already freed up.
   
   Please see Jira link below for error logs.
   
   ## What is the link to the Apache JIRA
   
   https://issues.apache.org/jira/browse/HDDS-3642
   
   ## How was this patch tested?
   
   Tested on a local docker cluster.
   


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