diff --git a/src/expr/impl/src/udf/external.rs b/src/expr/impl/src/udf/external.rs
index 0d6ba0e409386..a98e8b5c705dd 100644
--- a/src/expr/impl/src/udf/external.rs
+++ b/src/expr/impl/src/udf/external.rs
@@ -183,6 +183,13 @@ fn get_or_create_flight_client(link: &str) -> Result<Arc<Client>> {
                 .expect("failed to build udf runtime")
         });
         // create new client
+        static RUNTIME: LazyLock<Runtime> = LazyLock::new(|| {
+            tokio::runtime::Builder::new_multi_thread()
+                .thread_name("rw-udf-client")
+                .enable_all()
+                .build()
+                .expect("failed to build rw-udf-client runtime")
+        });
         let client = Arc::new(tokio::task::block_in_place(|| {
             RUNTIME.block_on(async {
                 let channel = connect_tonic(link).await?;