diff --git a/basic/checkpoint.md b/basic/checkpoint.md
index ccb149a..a17bb24 100644
--- a/basic/checkpoint.md
+++ b/basic/checkpoint.md
@@ -15,6 +15,9 @@
 
 ## Not all required tasks are currently running 
 
+部分算子任务已经完成，但是如果在维表join场景下，flink 1.13版本之前可能无法恢复checkpoint 
+
+
 
 ## An Exception occurred while triggering the checkpoint.