diff --git a/docs/zh/12-taos-sql/20-keywords.md b/docs/zh/12-taos-sql/20-keywords.md
index 92c814067e..09fea45b7a 100644
--- a/docs/zh/12-taos-sql/20-keywords.md
+++ b/docs/zh/12-taos-sql/20-keywords.md
@@ -6,7 +6,8 @@ description: TDengine 保留关键字的详细列表
 
 ## 保留关键字
 
-目前 TDengine 有将近 200 个内部保留关键字，这些关键字无论大小写均不可以用作库名、表名、STable 名、数据列名及标签列名等。这些关键字列表如下：
+目前 TDengine 有将近 200 个内部保留关键字，这些关键字无论大小写如果需要用作库名、表名、STable 名、数据列名及标签列名等，需要使用符合``将关键字括起来使用，例如`ADD`。
+关键字列表如下：
 
 ### A
 
@@ -239,6 +240,7 @@ description: TDengine 保留关键字的详细列表
 - TOPICS
 - TRIGGER
 - TSERIES
+- TTL
 
 ### U
 
diff --git a/source/dnode/vnode/src/sma/smaRollup.c b/source/dnode/vnode/src/sma/smaRollup.c
index dc7244ef10..fdd173cdf7 100644
--- a/source/dnode/vnode/src/sma/smaRollup.c
+++ b/source/dnode/vnode/src/sma/smaRollup.c
@@ -1701,16 +1701,16 @@ static int32_t tdRSmaFetchAllResult(SSma *pSma, SRSmaInfo *pInfo) {
 
       int64_t curMs = taosGetTimestampMs();
       if ((pItem->nSkipped * pItem->maxDelay) > RSMA_FETCH_DELAY_MAX) {
-        smaInfo("vgId:%d, suid:%" PRIi64 " level:%" PRIi8 " nSkipped:%" PRIi8 " maxDelay:%d, fetch executed",
-                SMA_VID(pSma), pInfo->suid, i, pItem->nSkipped, pItem->maxDelay);
+        smaDebug("vgId:%d, suid:%" PRIi64 " level:%" PRIi8 " nSkipped:%" PRIi8 " maxDelay:%d, fetch executed",
+                 SMA_VID(pSma), pInfo->suid, i, pItem->nSkipped, pItem->maxDelay);
       } else if (((curMs - pInfo->lastRecv) < RSMA_FETCH_ACTIVE_MAX)) {
         ++pItem->nSkipped;
-        smaDebug("vgId:%d, suid:%" PRIi64 " level:%" PRIi8 " curMs:%" PRIi64 " lastRecv:%" PRIi64 ", fetch skipped ",
+        smaTrace("vgId:%d, suid:%" PRIi64 " level:%" PRIi8 " curMs:%" PRIi64 " lastRecv:%" PRIi64 ", fetch skipped ",
                  SMA_VID(pSma), pInfo->suid, i, curMs, pInfo->lastRecv);
         continue;
       } else {
-        smaInfo("vgId:%d, suid:%" PRIi64 " level:%" PRIi8 " curMs:%" PRIi64 " lastRecv:%" PRIi64 ", fetch executed ",
-                SMA_VID(pSma), pInfo->suid, i, curMs, pInfo->lastRecv);
+        smaDebug("vgId:%d, suid:%" PRIi64 " level:%" PRIi8 " curMs:%" PRIi64 " lastRecv:%" PRIi64 ", fetch executed ",
+                 SMA_VID(pSma), pInfo->suid, i, curMs, pInfo->lastRecv);
       }
 
       pItem->nSkipped = 0;
diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index 5de9c52cc1..5d894783fb 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -1183,7 +1183,9 @@ void onUdfcPipeClose(uv_handle_t *handle) {
     QUEUE_REMOVE(&task->procTaskQueue);
     uv_sem_post(&task->taskSem);
   }
-  conn->session->udfUvPipe = NULL;
+  if (conn->session != NULL) {
+    conn->session->udfUvPipe = NULL;
+  }
   taosMemoryFree(conn->readBuf.buf);
   taosMemoryFree(conn);
   taosMemoryFree((uv_pipe_t *) handle);
@@ -1821,7 +1823,10 @@ int32_t doTeardownUdf(UdfcFuncHandle handle) {
   udfcRunUdfUvTask(task, UV_TASK_DISCONNECT);
 
   fnInfo("tear down udf. udf name: %s, udf func handle: %p", session->udfName, handle);
-
+  if (session->udfUvPipe != NULL && session->udfUvPipe->data != NULL) {
+    SClientUvConn *conn = session->udfUvPipe->data;
+    conn->session = NULL;
+  }
   taosMemoryFree(session);
   taosMemoryFree(task);