diff --git a/source/client/src/clientTmq.c b/source/client/src/clientTmq.c
index 922cab23c8..73f7c2bcc4 100644
--- a/source/client/src/clientTmq.c
+++ b/source/client/src/clientTmq.c
@@ -966,14 +966,14 @@ int32_t tmq_subscribe(tmq_t* tmq, const tmq_list_t* topic_list) {
   SCMSubscribeReq req = {0};
   int32_t         code = -1;
 
+  tscDebug("call tmq subscribe, consumer: %ld, topic num %d", tmq->consumerId, sz);
+
   req.consumerId = tmq->consumerId;
   tstrncpy(req.clientId, tmq->clientId, 256);
   tstrncpy(req.cgroup, tmq->groupId, TSDB_CGROUP_LEN);
   req.topicNames = taosArrayInit(sz, sizeof(void*));
   if (req.topicNames == NULL) goto FAIL;
 
-  tscDebug("call tmq subscribe, consumer: %ld, topic num %d", tmq->consumerId, sz);
-
   for (int32_t i = 0; i < sz; i++) {
     char* topic = taosArrayGetP(container, i);
 
diff --git a/source/dnode/mnode/impl/src/mndScheduler.c b/source/dnode/mnode/impl/src/mndScheduler.c
index 511a84290d..1c8ec0a302 100644
--- a/source/dnode/mnode/impl/src/mndScheduler.c
+++ b/source/dnode/mnode/impl/src/mndScheduler.c
@@ -416,7 +416,7 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
       }
 
       SStreamTask* pTask = tNewSStreamTask(pStream->uid);
-      if (pInnerTask == NULL) {
+      if (pTask == NULL) {
         terrno = TSDB_CODE_OUT_OF_MEMORY;
         sdbRelease(pSdb, pVgroup);
         qDestroyQueryPlan(pPlan);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index e1578b37f1..aaa57d49ed 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1010,16 +1010,21 @@ int32_t tqProcessDelReq(STQ* pTq, void* pReq, int32_t len, int64_t ver) {
 
       if (streamTaskInput(pTask, (SStreamQueueItem*)pRefBlock) < 0) {
         qError("stream task input del failed, task id %d", pTask->taskId);
+
+        taosFreeQitem(pRefBlock);
         continue;
       }
+
       if (streamSchedExec(pTask) < 0) {
         qError("stream task launch failed, task id %d", pTask->taskId);
         continue;
       }
+
     } else {
       streamTaskInputFail(pTask);
     }
   }
+
   int32_t ref = atomic_sub_fetch_32(pRef, 1);
   ASSERT(ref >= 0);
   if (ref == 0) {
diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index 1e5c63fa8d..91fa49fce0 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -45,6 +45,7 @@ int32_t walRestoreFromSnapshot(SWal *pWal, int64_t ver) {
       if (taosRemoveFile(fnameStr) < 0) {
         terrno = TAOS_SYSTEM_ERROR(errno);
         wError("vgId:%d restore from snapshot, cannot remove file %s since %s", pWal->cfg.vgId, fnameStr, terrstr());
+        taosThreadMutexUnlock(&pWal->mutex);
         return -1;
       }
       wInfo("vgId:%d restore from snapshot, remove file %s", pWal->cfg.vgId, fnameStr);
@@ -53,6 +54,7 @@ int32_t walRestoreFromSnapshot(SWal *pWal, int64_t ver) {
       if (taosRemoveFile(fnameStr) < 0) {
         terrno = TAOS_SYSTEM_ERROR(errno);
         wError("vgId:%d cannot remove file %s since %s", pWal->cfg.vgId, fnameStr, terrstr());
+        taosThreadMutexUnlock(&pWal->mutex);
         return -1;
       }
       wInfo("vgId:%d restore from snapshot, remove file %s", pWal->cfg.vgId, fnameStr);