HBASE-17460 enable_table_replication can not perform cyclic replication of a table - addendum removes replication check (Janos Gub)

hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java

@@ -1038,31 +1038,6 @@ public class HTableDescriptor implements Comparable<HTableDescriptor> {
     return compareTo((HTableDescriptor)obj) == 0;
   }
 
-  /**
-   * Detects whether replication has been already enabled on any of the column families of this
-   * table descriptor.
-   * @return true if any of the column families has replication enabled.
-   */
-  public boolean isReplicationEnabled() {
-    // Go through each Column-Family descriptor and check if the
-    // Replication has been enabled already.
-    // Return 'true' if replication has been enabled on any CF,
-    // otherwise return 'false'.
-    //
-    boolean result = false;
-    Iterator<HColumnDescriptor> it = this.families.values().iterator();
-
-    while (it.hasNext()) {
-      HColumnDescriptor tempHcd = it.next();
-      if (tempHcd.getScope() != HConstants.REPLICATION_SCOPE_LOCAL) {
-        result = true;
-        break;
-      }
-    }
-
-    return result;
-  }
-
   /**
    * @see java.lang.Object#hashCode()
    */

hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java

@@ -4185,16 +4185,7 @@ public class HBaseAdmin implements Admin {
             if (peerHtd == null) {
               throw new IllegalArgumentException("Failed to get table descriptor for table "
                   + tableName.getNameAsString() + " from peer cluster " + peerDesc.getPeerId());
-            } else {
+            }
-              // To support cyclic replication (HBASE-17460), we need to match the
-              // REPLICATION_SCOPE of table on both the clusters. We should do this
-              // only when the replication is not already enabled on local HTD (local
-              // table on this cluster).
-              //
-              if (localHtd.isReplicationEnabled()) {
-                throw new IllegalArgumentException("Table " + tableName.getNameAsString()
-                    + " has replication already enabled for at least one Column Family.");
-              } else {
             if (!compareForReplication(peerHtd, localHtd)) {
               throw new IllegalArgumentException("Table " + tableName.getNameAsString()
                   + " exists in peer cluster " + peerDesc.getPeerId()
@@ -4206,8 +4197,6 @@ public class HBaseAdmin implements Admin {
       }
     }
   }
-    }
-  }
 
   /**
    * Decide whether the table need replicate to the peer cluster according to the peer config