diff --git a/core/src/main/java/org/apache/druid/data/input/impl/LocalInputSource.java b/core/src/main/java/org/apache/druid/data/input/impl/LocalInputSource.java
index 04b7dc7b2cd9..c765717b3a1a 100644
--- a/core/src/main/java/org/apache/druid/data/input/impl/LocalInputSource.java
+++ b/core/src/main/java/org/apache/druid/data/input/impl/LocalInputSource.java
@@ -40,6 +40,7 @@
 import org.apache.druid.data.input.InputSplit;
 import org.apache.druid.data.input.SplitHintSpec;
 import org.apache.druid.java.util.common.IAE;
+import org.apache.druid.java.util.common.logger.Logger;
 import org.apache.druid.utils.CollectionUtils;
 import org.apache.druid.utils.Streams;
 
@@ -56,6 +57,8 @@
 
 public class LocalInputSource extends AbstractInputSource implements SplittableInputSource<List<File>>
 {
+  private static final Logger log = new Logger(LocalInputSource.class);
+
   @Nullable
   private final File baseDir;
   @Nullable
@@ -151,11 +154,17 @@ private Iterator<File> getDirectoryListingIterator()
             )
         );
       }
-      return FileUtils.iterateFiles(
+      Iterator<File> fileIterator = FileUtils.iterateFiles(
           baseDir.getAbsoluteFile(),
           fileFilter,
           TrueFileFilter.INSTANCE
       );
+      if (!fileIterator.hasNext()) {
+        // base dir & filter are guaranteed to be non-null here
+        // (by construction and non-null check of baseDir a few lines above):
+        log.info("Local inputSource filter [%s] for base dir [%s] did not match any files", filter, baseDir);
+      }
+      return fileIterator;
     }
   }