diff --git a/reconstruction/dc/src/main/java/org/jlab/service/dc/DCHBPostClusterAI.java b/reconstruction/dc/src/main/java/org/jlab/service/dc/DCHBPostClusterAI.java
index 4651716770..c35b8d4a86 100644
--- a/reconstruction/dc/src/main/java/org/jlab/service/dc/DCHBPostClusterAI.java
+++ b/reconstruction/dc/src/main/java/org/jlab/service/dc/DCHBPostClusterAI.java
@@ -30,7 +30,7 @@
 
 /**
  *
- * @author ziegler
+ * @author ziegler, tongtong
  */
 public class DCHBPostClusterAI extends DCEngine {
 
@@ -126,7 +126,6 @@ public boolean processDataEvent(DataEvent event) {
             dcSwim, true);
 
         // track found
-        clusters = new ArrayList<>();
         int trkId = 1;
         if (trkcands.size() > 0) {
             // remove overlaps
@@ -311,7 +310,7 @@ public boolean processDataEvent(DataEvent event) {
         // the clusters, the segments, the crosses
         if (trkcands.isEmpty()) {
             event.appendBanks(
-                    writer.fillHBHitsBank(event, fhits),    
+                    writer.fillHBHitsBank(event, fhits),  
                     writer.fillHBSegmentsBank(event, segments),
                     writer.fillHBCrossesBank(event, crosses));
         }