diff --git a/packages/PrintRecommendationService/src/com/android/printservice/recommendation/RecommendationServiceImpl.java b/packages/PrintRecommendationService/src/com/android/printservice/recommendation/RecommendationServiceImpl.java
index 9ae31989eeb2b..5a756fe50209a 100644
--- a/packages/PrintRecommendationService/src/com/android/printservice/recommendation/RecommendationServiceImpl.java
+++ b/packages/PrintRecommendationService/src/com/android/printservice/recommendation/RecommendationServiceImpl.java
@@ -46,7 +46,7 @@ public class RecommendationServiceImpl extends RecommendationService
     private static final String LOG_TAG = "PrintServiceRecService";
 
     /** All registered plugins */
-    private ArrayList<RemotePrintServicePlugin> mPlugins;
+    private final ArrayList<RemotePrintServicePlugin> mPlugins = new ArrayList<>();
 
     /** Lock to keep multi-cast enabled */
     private WifiManager.MulticastLock mMultiCastLock;
@@ -62,8 +62,6 @@ public class RecommendationServiceImpl extends RecommendationService
             mMultiCastLock.acquire();
         }
 
-        mPlugins = new ArrayList<>();
-
         try {
             for (VendorConfig config : VendorConfig.getAllConfigs(this)) {
                 try {
@@ -138,6 +136,7 @@ public class RecommendationServiceImpl extends RecommendationService
                 Log.e(LOG_TAG, "Could not stop plugin", e);
             }
         }
+        mPlugins.clear();
 
         if (mMultiCastLock != null) {
             mMultiCastLock.release();