diff --git a/datafusion/src/plugin/plugin_manager.rs b/datafusion/src/plugin/plugin_manager.rs
index 764e94157a00..f40fd3f33769 100644
--- a/datafusion/src/plugin/plugin_manager.rs
+++ b/datafusion/src/plugin/plugin_manager.rs
@@ -67,6 +67,7 @@ impl GlobalPluginManager {
         let plugin_files = self.get_all_plugin_files(plugin_path)?;
 
         for plugin_file in plugin_files {
+            println!("load library :{}", plugin_file.path().to_str().unwrap());
             let library = Library::new(plugin_file.path()).map_err(|e| {
                 DataFusionError::IoError(io::Error::new(
                     io::ErrorKind::Other,
@@ -90,9 +91,10 @@ impl GlobalPluginManager {
             // ersion checks to prevent accidental ABI incompatibilities
 
             if dec.rustc_version != RUSTC_VERSION || dec.core_version != CORE_VERSION {
+                println!("Version mismatch rustc_version:{}, core_version:{}", RUSTC_VERSION, CORE_VERSION);
                 return Err(DataFusionError::IoError(io::Error::new(
                     io::ErrorKind::Other,
-                    "Version mismatch",
+                    format!("Version mismatch rustc_version:{}, core_version:{}", RUSTC_VERSION, CORE_VERSION),
                 )));
             }
 
diff --git a/datafusion/src/plugin/udf.rs b/datafusion/src/plugin/udf.rs
index 7f223ee69570..2b87daa34ac5 100644
--- a/datafusion/src/plugin/udf.rs
+++ b/datafusion/src/plugin/udf.rs
@@ -63,14 +63,16 @@ impl PluginRegistrar for UDFPluginManager {
                     format!("not found fn registrar_udf_plugin in the library: {}", e),
                 ))
             })?;
-
+        println!("1111111111111111111111");
         let udf_plugin: Box<dyn UDFPlugin> = register_fun();
         udf_plugin
             .udf_names()
             .unwrap()
             .iter()
             .try_for_each(|udf_name| {
+                println!("udf_name: {}", udf_name);
                 if self.scalar_udfs.contains_key(udf_name) {
+                    println!("udf_name exists");
                     Err(DataFusionError::IoError(io::Error::new(
                         io::ErrorKind::Other,
                         format!("udf name: {} already exists", udf_name),
@@ -88,7 +90,9 @@ impl PluginRegistrar for UDFPluginManager {
             .unwrap()
             .iter()
             .try_for_each(|udaf_name| {
+                println!("udaf_name: {}", udaf_name);
                 if self.aggregate_udfs.contains_key(udaf_name) {
+                    println!("udaf_name exists");
                     Err(DataFusionError::IoError(io::Error::new(
                         io::ErrorKind::Other,
                         format!("udaf name: {} already exists", udaf_name),
@@ -124,6 +128,7 @@ macro_rules! declare_udf_plugin {
             // make sure the constructor is the correct type.
             let constructor: fn() -> $curr_plugin_type = $constructor;
             let object = constructor();
+            println!("I be called");
             Box::new(object)
         }