Guanghao Zhang created HBASE-20529:
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             Summary: Make sure that there are no remote wals when transit 
cluster from DA to A
                 Key: HBASE-20529
                 URL: https://issues.apache.org/jira/browse/HBASE-20529
             Project: HBase
          Issue Type: Sub-task
          Components: Replication
            Reporter: Guanghao Zhang


Consider we have two clusters in A and S state, and then we transit A to DA. 
And later we want to transit DA to A, since the remote cluster is in S, we 
should be able to do it. But there are some remote wals on the HDFS for the 
cluster in S state, so we need to wait the remote wals was removed first before 
transiting the cluster in DA state to A. Need add a check for this.



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