diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
index d9345d8a5da..a039e6a6b85 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
@@ -1632,6 +1632,11 @@ public class AssignmentManager extends ZooKeeperListener {
    * @param regionInfo
    */
   public void regionOffline(final HRegionInfo regionInfo) {
+    if (regionStates.isRegionInState(regionInfo, State.MERGED, State.SPLIT)) {
+      LOG.info("Try to offline region " + regionInfo.getEncodedName() +
+          ", which is at state " + regionStates.getRegionState(regionInfo).getState() + ", skip");
+      return;
+    }
     regionOffline(regionInfo, null);
   }