diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/parallel/WhenFutureObj.java b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/parallel/WhenFutureObj.java
index f36859ebe..d997cc2ae 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/parallel/WhenFutureObj.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/parallel/WhenFutureObj.java
@@ -1,5 +1,9 @@
 package com.yomahub.liteflow.entity.flow.parallel;
 
+import cn.hutool.core.util.StrUtil;
+import com.yomahub.liteflow.exception.WhenTimeoutException;
+import com.yomahub.liteflow.property.LiteflowConfigGetter;
+
 /**
  * 并行异步CompletableFuture里的值对象
  * @author Bryan.Zhang
@@ -37,6 +41,11 @@ public class WhenFutureObj {
         result.setSuccess(false);
         result.setTimeout(true);
         result.setExecutorName(executorName);
+        result.setEx(new WhenTimeoutException(
+                StrUtil.format("Timed out when executing the component[{}],when-max-timeout-seconds config is:{}(s)",
+                        executorName,
+                        LiteflowConfigGetter.get().getWhenMaxWaitSeconds()))
+        );
         return result;
     }
 
diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/exception/WhenTimeoutException.java b/liteflow-core/src/main/java/com/yomahub/liteflow/exception/WhenTimeoutException.java
new file mode 100644
index 000000000..71f139165
--- /dev/null
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/exception/WhenTimeoutException.java
@@ -0,0 +1,21 @@
+package com.yomahub.liteflow.exception;
+
+
+public class WhenTimeoutException extends RuntimeException {
+    private static final long serialVersionUID = 1L;
+
+    /** 异常信息 */
+    private String message;
+
+    public WhenTimeoutException(String message) {
+        this.message = message;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+}