diff --git a/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/ReflectUtil.java b/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/ReflectUtil.java
index 1e18e84f..8f4fc5b4 100644
--- a/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/ReflectUtil.java
+++ b/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/ReflectUtil.java
@@ -147,8 +147,8 @@ public class ReflectUtil {
     }
 
     /**
-     * find the method associated with the method name<br>
-     * if find multiple, return the first, parameter is equivocal
+     * Find the method associated with the method name<br>
+     * if find multiple, return the first, parameter is equivocal.
      *
      * @param clazz      the class
      * @param methodName retrieves the method name
@@ -170,7 +170,7 @@ public class ReflectUtil {
     }
 
     /**
-     * find the method associated with the method name
+     * Find the method associated with the method name.
      *
      * @param clazz      the class
      * @param methodName retrieves the method name
@@ -190,7 +190,7 @@ public class ReflectUtil {
 
     /**
      * Cast the value to the type <br>
-     * If a ClassCastException occurs, return null
+     * If a ClassCastException occurs, return null.
      *
      * @param clazz Cast class
      * @param value The cast value
@@ -205,7 +205,7 @@ public class ReflectUtil {
     }
 
     /**
-     * the default value is obtained if it is a primitive type, and NULL if it is not
+     * The default value is obtained if it is a primitive type, and NULL if it is not.
      *
      * @param clazz clazz
      * @return default value
@@ -235,7 +235,7 @@ public class ReflectUtil {
     }
 
     /**
-     * invoke
+     * Invoke.
      *
      * @param obj       the obj
      * @param method    the method
@@ -252,7 +252,7 @@ public class ReflectUtil {
     }
 
     /**
-     * get instance
+     * Get instance.
      *
      * @param cls the class
      * @return new Instance
@@ -266,8 +266,9 @@ public class ReflectUtil {
     }
 
     /**
-     * find field by fieldName and fieldType
-     * @param obj target obj
+     * Find field by fieldName and field-type.
+     *
+     * @param obj       target obj
      * @param filedName filedName
      * @param fieldType fieldType
      * @return target field or null
diff --git a/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/adpter/DynamicThreadPoolAdapterChoose.java b/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/adpter/DynamicThreadPoolAdapterChoose.java
index 83ca0f63..39a4ba73 100644
--- a/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/adpter/DynamicThreadPoolAdapterChoose.java
+++ b/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/adpter/DynamicThreadPoolAdapterChoose.java
@@ -18,6 +18,7 @@
 package cn.hippo4j.core.executor.support.adpter;
 
 import cn.hippo4j.common.spi.DynamicThreadPoolServiceLoader;
+import cn.hippo4j.common.toolkit.CollectionUtil;
 import cn.hippo4j.core.executor.DynamicThreadPoolExecutor;
 import cn.hippo4j.core.executor.support.spi.DynamicThreadPoolAdapterSPI;
 
@@ -81,11 +82,14 @@ public class DynamicThreadPoolAdapterChoose {
     }
 
     /**
-     * load SPI customer adapter
+     * Load SPI customer adapter.
      */
     private static void loadCustomerAdapter() {
         DynamicThreadPoolServiceLoader.register(DynamicThreadPoolAdapterSPI.class);
         Collection<DynamicThreadPoolAdapterSPI> instances = DynamicThreadPoolServiceLoader.getSingletonServiceInstances(DynamicThreadPoolAdapterSPI.class);
+        if (CollectionUtil.isEmpty(instances)) {
+            return;
+        }
         for (DynamicThreadPoolAdapterSPI instance : instances) {
             DynamicThreadPoolAdapter adapter = instance.adapter();
             if (adapter != null) {
diff --git a/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/spi/DynamicThreadPoolAdapterSPI.java b/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/spi/DynamicThreadPoolAdapterSPI.java
index 9d0601c1..1fe5780d 100644
--- a/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/spi/DynamicThreadPoolAdapterSPI.java
+++ b/hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/spi/DynamicThreadPoolAdapterSPI.java
@@ -19,8 +19,18 @@ package cn.hippo4j.core.executor.support.spi;
 
 import cn.hippo4j.core.executor.support.adpter.DynamicThreadPoolAdapter;
 
+/**
+ * Dynamic thread-pool adapter SPI.
+ */
 public interface DynamicThreadPoolAdapterSPI {
 
+    /**
+     * Name.
+     */
     String name();
+
+    /**
+     * Adapter.
+     */
     DynamicThreadPoolAdapter adapter();
 }