diff --git a/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/ProcedureStoreTracker.java b/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/ProcedureStoreTracker.java
index 64479b220b2..9f99e266654 100644
--- a/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/ProcedureStoreTracker.java
+++ b/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/ProcedureStoreTracker.java
@@ -376,6 +376,24 @@ public class ProcedureStoreTracker {
   }
 
   private BitSetNode getOrCreateNode(long procId) {
+    // See HBASE-20973, grow or merge can lead to ArrayIndexOutOfBoundsException
+    // The root cause is not revealed yet, disable grow or merge for now
+    return getOrCreateNodeNoGrowOrMerge(procId);
+  }
+
+  private BitSetNode getOrCreateNodeNoGrowOrMerge(long procId) {
+    Map.Entry<Long, BitSetNode> entry = map.floorEntry(procId);
+    if (entry != null && entry.getValue().contains(procId)) {
+      return entry.getValue();
+    } else {
+      BitSetNode node = new BitSetNode(procId, partial);
+      assert !map.containsKey(node.getStart());
+      map.put(node.getStart(), node);
+      return node;
+    }
+  }
+
+  private BitSetNode getOrCreateNodeWithGrowOrMerge(long procId) {
     // If procId can fit in left node (directly or by growing it)
     BitSetNode leftNode = null;
     boolean leftCanGrow = false;