ChenSammi commented on issue #1469: HDDS-2034. Async RATIS pipeline creation 
and destroy through heartbea…
URL: https://github.com/apache/hadoop/pull/1469#issuecomment-539294113
 
 
   > > I think the purpose of safemode is to guarantee that Ozone cluster is 
ready to provide service to Ozone client once safemode is exited.
   > 
   > @ChenSammi I agree with that. I think the problem occurs with 
OneReplicaPipelineSafeModeRule. This rule makes sure that atleast one datanode 
in the old pipeline is reported so that reads for OPEN containers can go 
through. Here I think that old pipelines need to be tracked separately.
   
   OK, I will try to separate the olds from the new ones. 

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