Apache9 commented on issue #339: HBASE-22627 Port HBASE-22617 (Recovered WAL 
directories not getting cleaned up) to branch-1
URL: https://github.com/apache/hbase/pull/339#issuecomment-505681043
 
 
   > Latest patch drops the parts of the branch-2+ patch which automatically 
clean up the WAL dirs. To be conservative I worry about the potential impact to 
replication. We will still delete the wrong region dir upon open after replay. 
Only recovered edits files should have been written there.
   
   It should be safe as you said, only recovered edits will be rewritten there, 
and replication will not read recovered edits.

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