diff --git a/paimon-common/src/main/java/org/apache/paimon/fs/FileIO.java b/paimon-common/src/main/java/org/apache/paimon/fs/FileIO.java
index bbc69d6f3c54..cd9022e232bf 100644
--- a/paimon-common/src/main/java/org/apache/paimon/fs/FileIO.java
+++ b/paimon-common/src/main/java/org/apache/paimon/fs/FileIO.java
@@ -335,6 +335,10 @@ default Optional<String> readOverwrittenFileUtf8(Path path) throws IOException {
      */
     static FileIO get(Path path, CatalogContext config) throws IOException {
         URI uri = path.toUri();
+        if (LOG.isDebugEnabled()) {
+            LOG.debug("Getting FileIO by scheme {}.", uri.getScheme());
+        }
+
         if (uri.getScheme() == null) {
             return new LocalFileIO();
         }
@@ -362,6 +366,12 @@ static FileIO get(Path path, CatalogContext config) throws IOException {
         FileIOLoader preferIOLoader = config.preferIO();
         try {
             loader = checkAccess(preferIOLoader, path, config);
+            if (loader != null && LOG.isDebugEnabled()) {
+                LOG.debug(
+                        "Found preferIOLoader {} with scheme {}.",
+                        loader.getClass().getName(),
+                        loader.getScheme());
+            }
         } catch (IOException ioException) {
             ioExceptionList.add(ioException);
         }
@@ -369,6 +379,18 @@ static FileIO get(Path path, CatalogContext config) throws IOException {
         if (loader == null) {
             Map<String, FileIOLoader> loaders = discoverLoaders();
             loader = loaders.get(uri.getScheme());
+            if (!loaders.isEmpty() && LOG.isDebugEnabled()) {
+                LOG.debug(
+                        "Discovered FileIOLoaders: {}.",
+                        loaders.entrySet().stream()
+                                .map(
+                                        e ->
+                                                String.format(
+                                                        "{%s,%s}",
+                                                        e.getKey(),
+                                                        e.getValue().getClass().getName()))
+                                .collect(Collectors.joining(",")));
+            }
         }
 
         // load fallbackIO
@@ -401,6 +423,11 @@ static FileIO get(Path path, CatalogContext config) throws IOException {
                                                 + "%s",
                                         String.join("\n", missOptions)));
                 ioExceptionList.add(exception);
+                if (LOG.isDebugEnabled()) {
+                    LOG.debug(
+                            "Got {} but miss options. Will try to get fallback IO and Hadoop IO respectively.",
+                            loader.getClass().getName());
+                }
                 loader = null;
             }
         }
@@ -408,6 +435,9 @@ static FileIO get(Path path, CatalogContext config) throws IOException {
         if (loader == null) {
             try {
                 loader = checkAccess(fallbackIO, path, config);
+                if (loader != null && LOG.isDebugEnabled()) {
+                    LOG.debug("Got fallback FileIOLoader: {}.", loader.getClass().getName());
+                }
             } catch (IOException ioException) {
                 ioExceptionList.add(ioException);
             }
@@ -417,6 +447,9 @@ static FileIO get(Path path, CatalogContext config) throws IOException {
         if (loader == null) {
             try {
                 loader = checkAccess(new HadoopFileIOLoader(), path, config);
+                if (loader != null && LOG.isDebugEnabled()) {
+                    LOG.debug("Got hadoop FileIOLoader: {}.", loader.getClass().getName());
+                }
             } catch (IOException ioException) {
                 ioExceptionList.add(ioException);
             }