diff --git a/source/dnode/mnode/impl/src/mndMnode.c b/source/dnode/mnode/impl/src/mndMnode.c
index c89fc26fb5..ee899fa833 100644
--- a/source/dnode/mnode/impl/src/mndMnode.c
+++ b/source/dnode/mnode/impl/src/mndMnode.c
@@ -920,7 +920,9 @@ static int32_t mndRetrieveMnodes(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pB
     SColumnInfoData *pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     code = colDataSetVal(pColInfo, numOfRows, (const char *)&pObj->id, false);
     if (code != 0) {
-      mError("mnode:%d, failed to set col data val since %s", pObj->id, terrstr());
+      mError("mnode:%d, failed to set col data val since %s", pObj->id, tstrerror(code));
+      sdbCancelFetch(pSdb, pShow->pIter);
+      sdbRelease(pSdb, pObj);
       goto _out;
     }
 
@@ -930,7 +932,9 @@ static int32_t mndRetrieveMnodes(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pB
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     code = colDataSetVal(pColInfo, numOfRows, b1, false);
     if (code != 0) {
-      mError("mnode:%d, failed to set col data val since %s", pObj->id, terrstr());
+      mError("mnode:%d, failed to set col data val since %s", pObj->id, tstrerror(code));
+      sdbCancelFetch(pSdb, pShow->pIter);
+      sdbRelease(pSdb, pObj);
       goto _out;
     }
 
@@ -951,7 +955,9 @@ static int32_t mndRetrieveMnodes(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pB
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     code = colDataSetVal(pColInfo, numOfRows, (const char *)b2, false);
     if (code != 0) {
-      mError("mnode:%d, failed to set col data val since %s", pObj->id, terrstr());
+      mError("mnode:%d, failed to set col data val since %s", pObj->id, tstrerror(code));
+      sdbCancelFetch(pSdb, pShow->pIter);
+      sdbRelease(pSdb, pObj);
       goto _out;
     }
     const char *status = "ready";
@@ -963,14 +969,18 @@ static int32_t mndRetrieveMnodes(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pB
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     code = colDataSetVal(pColInfo, numOfRows, (const char *)b3, false);
     if (code != 0) {
-      mError("mnode:%d, failed to set col data val since %s", pObj->id, terrstr());
+      mError("mnode:%d, failed to set col data val since %s", pObj->id, tstrerror(code));
+      sdbCancelFetch(pSdb, pShow->pIter);
+      sdbRelease(pSdb, pObj);
       goto _out;
     }
 
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     code = colDataSetVal(pColInfo, numOfRows, (const char *)&pObj->createdTime, false);
     if (code != 0) {
-      mError("mnode:%d, failed to set col data val since %s", pObj->id, terrstr());
+      mError("mnode:%d, failed to set col data val since %s", pObj->id, tstrerror(code));
+      sdbCancelFetch(pSdb, pShow->pIter);
+      sdbRelease(pSdb, pObj);
       goto _out;
     }
 
@@ -978,7 +988,9 @@ static int32_t mndRetrieveMnodes(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pB
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     code = colDataSetVal(pColInfo, numOfRows, (const char *)&roleTimeMs, false);
     if (code != 0) {
-      mError("mnode:%d, failed to set col data val since %s", pObj->id, terrstr());
+      mError("mnode:%d, failed to set col data val since %s", pObj->id, tstrerror(code));
+      sdbCancelFetch(pSdb, pShow->pIter);
+      sdbRelease(pSdb, pObj);
       goto _out;
     }