diff --git a/source/dnode/mnode/impl/src/mndStreamTransAct.c b/source/dnode/mnode/impl/src/mndStreamTransAct.c
index 3ecd192222..4e0bf97587 100644
--- a/source/dnode/mnode/impl/src/mndStreamTransAct.c
+++ b/source/dnode/mnode/impl/src/mndStreamTransAct.c
@@ -234,6 +234,7 @@ static int32_t doSetUpdateTaskAction(SMnode *pMnode, STrans *pTrans, SStreamTask
   code = extractNodeEpset(pMnode, &epset, &hasEpset, pTask->id.taskId, pTask->info.nodeId);
   if (code != TSDB_CODE_SUCCESS || !hasEpset) {
     mError("failed to extract epset during create update epset, code:%s", tstrerror(code));
+    taosMemoryFree(pBuf);
     return code;
   }