Add a hook for tracking inserts into the method cache and log whenever clone methods are added.

1 files changed, 1 insertions, 1 deletions

diff --git a/container-core/src/main/java/com/yahoo/processing/request/CloneHelper.java b/container-core/src/main/java/com/yahoo/processing/request/CloneHelper.java
index cf3ff7d3d66..4ee8df0c249 100644
--- a/container-core/src/main/java/com/yahoo/processing/request/CloneHelper.java
+++ b/container-core/src/main/java/com/yahoo/processing/request/CloneHelper.java
@@ -114,7 +114,7 @@ public class CloneHelper {
 
     private Object cloneByReflection(Object object) {
         try {
-            Method cloneMethod = cloneMethodCache.get(object);
+            Method cloneMethod = cloneMethodCache.get(object, name -> log.warning("Caching the clone method of '" + name + "'. Let it implement com.yahoo.lang.PublicCloneable instead"));
             if (cloneMethod == null) {
                 log.warning("'" + object + "' of class " + object.getClass() +
                             " is Cloneable, but has no clone method - will use the same instance in all requests");