diff --git a/src/main/java/org/redkale/schedule/Scheduled.java b/src/main/java/org/redkale/schedule/Scheduled.java
index a524460f4..8d4264644 100644
--- a/src/main/java/org/redkale/schedule/Scheduled.java
+++ b/src/main/java/org/redkale/schedule/Scheduled.java
@@ -32,8 +32,9 @@ public @interface Scheduled {
 
     /**
      * cron表达式, 特殊值: <br>
-     * yearly、annually、monthly、weekly、daily、midnight、hourly、minutely
-     * 1m、2m、3m、5m、10m、15m、30m、1h、2h、3h、6h
+     * &#64;yearly、&#64;annually、&#64;monthly、&#64;weekly、&#64;daily、&#64;midnight、&#64;hourly、&#64;minutely
+     * &#64;1m、&#64;2m、&#64;3m、&#64;5m、&#64;10m、&#64;15m、&#64;30m、
+     * &#64;1h、&#64;2h、&#64;3h、&#64;6h
      * ${env.scheduling.cron}: 读取系统配置项
      *
      * @return cron表达式
diff --git a/src/main/java/org/redkale/schedule/spi/CronExpression.java b/src/main/java/org/redkale/schedule/spi/CronExpression.java
index baa0607b7..e7bfaa125 100644
--- a/src/main/java/org/redkale/schedule/spi/CronExpression.java
+++ b/src/main/java/org/redkale/schedule/spi/CronExpression.java
@@ -32,9 +32,33 @@ public class CronExpression {
         "@yearly", "0 0 0 1 1 *",
         "@annually", "0 0 0 1 1 *",
         "@monthly", "0 0 0 1 * *",
+        "@monthly10s", "10 0 0 1 * *",
+        "@monthly30s", "30 0 0 1 * *",
+        "@monthly1m", "0 1 0 1 * *",
+        "@monthly5m", "0 5 0 1 * *",
+        "@monthly15m", "0 15 0 1 * *",
+        "@monthly30m", "0 30 0 1 * *",
+        "@monthly1h", "0 0 1 1 * *",
+        "@monthly2h", "0 0 2 1 * *",
         "@weekly", "0 0 0 * * 0",
         "@daily", "0 0 0 * * *",
+        "@daily10s", "10 0 0 * * *",
+        "@daily30s", "30 0 0 * * *",
+        "@daily1m", "0 1 0 * * *",
+        "@daily5m", "0 5 0 * * *",
+        "@daily15m", "0 15 0 * * *",
+        "@daily30m", "0 30 0 * * *",
+        "@daily1h", "0 0 1 * * *",
+        "@daily2h", "0 0 2 * * *",
         "@midnight", "0 0 0 * * *",
+        "@midnight10s", "10 0 0 * * *",
+        "@midnight30s", "30 0 0 * * *",
+        "@midnight1m", "0 1 0 * * *",
+        "@midnight5m", "0 5 0 * * *",
+        "@midnight15m", "0 15 0 * * *",
+        "@midnight30m", "0 30 0 * * *",
+        "@midnight1h", "0 0 1 * * *",
+        "@midnight2h", "0 0 2 * * *",
         "@hourly", "0 0 * * * *",
         "@minutely", "0 0/1 * * * *",
         "@1m", "0 0/1 * * * *",
diff --git a/src/main/java/org/redkale/source/DataJdbcSource.java b/src/main/java/org/redkale/source/DataJdbcSource.java
index 6028dec5e..2b078586e 100644
--- a/src/main/java/org/redkale/source/DataJdbcSource.java
+++ b/src/main/java/org/redkale/source/DataJdbcSource.java
@@ -415,6 +415,7 @@ public class DataJdbcSource extends AbstractDataSqlSource {
             }
         } catch (SQLException se) {
             conn.rollback(prestmt, prestmts);
+            stmtsRef.clear();
             if (!isTableNotExist(info, se.getSQLState())) {
                 throw se;
             }
@@ -3033,14 +3034,13 @@ public class DataJdbcSource extends AbstractDataSqlSource {
                 return conn;
             } else {
                 offerConnection(conn);
-                conn = null;
             }
             return newConnection(this.queue);
         }
 
         //用于事务的连接
         public JdbcConnection pollTransConnection() {
-            return pollTransConnection();
+            return pollConnection();
         }
 
         private JdbcConnection newConnection(ArrayBlockingQueue<JdbcConnection> queue) {