apurtell edited a comment on pull request #3234:
URL: https://github.com/apache/hbase/pull/3234#issuecomment-833127897


   > (I just noticed the wonky split message -- have started a bit of ITBLL 
over here...)
   
   I've committed a few changes over the past couple of days that address two 
issues here. One was an accumulation of SPLIT state regionStates for as long as 
CatalogJanitor is deferring cleanup, because daughters still have references, 
because compaction is backed up. The accumulation is fine but it caused 
concerning warnings at each balancer iteration. Another was a race condition 
between split handling and regionserver report handling that could cause 
multiple split procedures to get scheduled for the same split request. Only one 
could succeed. The others would cause log noise but their failures were 
harmless. Would be good to get a second opinion.


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