diff --git a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/DatasetInfo.java b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/DatasetInfo.java
index 7483a17..d15d9be 100644
--- a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/DatasetInfo.java
+++ b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/DatasetInfo.java
@@ -195,12 +195,14 @@
     public synchronized void addIndex(long resourceID, IndexInfo indexInfo) {
         indexes.put(resourceID, indexInfo);
         partitionIndexes.computeIfAbsent(indexInfo.getPartition(), partition -> new HashSet<>()).add(indexInfo);
+        LOGGER.debug("registered reference to index {}", indexInfo);
     }
 
     public synchronized void removeIndex(long resourceID) {
         IndexInfo info = indexes.remove(resourceID);
         if (info != null) {
             partitionIndexes.get(info.getPartition()).remove(info);
+            LOGGER.debug("removed reference to index {}", info);
         }
     }
 
diff --git a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/IndexInfo.java b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/IndexInfo.java
index b094b6f..8b631c2 100644
--- a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/IndexInfo.java
+++ b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/context/IndexInfo.java
@@ -55,4 +55,10 @@
     public LocalResource getLocalResource() {
         return localResource;
     }
+
+    @Override
+    public String toString() {
+        return "IndexInfo{" + "index=" + index + ", datasetId=" + datasetId + ", resourceId=" + resourceId
+                + ", partition=" + partition + ", localResource=" + localResource + '}';
+    }
 }