fix(stream): fix memory leak.

source/dnode/snode/src/snode.c

@@ -186,9 +186,6 @@ int32_t sndProcessTaskDropReq(SSnode *pSnode, char *msg, int32_t msgLen) {
   }
 
   streamMetaUnregisterTask(pSnode->pMeta, pReq->taskId);
-  streamMetaRemoveTask(pSnode->pMeta, pReq->taskId);
-
-  streamMetaReleaseTask(pSnode->pMeta, pTask);
   streamMetaReleaseTask(pSnode->pMeta, pTask);
   return 0;
 }

source/dnode/vnode/src/tq/tq.c

@@ -1047,6 +1047,7 @@ int32_t tqProcessTaskDeployReq(STQ* pTq, int64_t sversion, char* msg, int32_t ms
   int32_t numOfTasks = streamMetaGetNumOfTasks(pStreamMeta);
   if (code < 0) {
     tqError("vgId:%d failed to add s-task:%s, total:%d", vgId, pTask->id.idStr, numOfTasks);
+    tFreeStreamTask(pTask);
     taosWUnLockLatch(&pStreamMeta->lock);
     return -1;
   }
@@ -1261,6 +1262,7 @@ int32_t tqProcessTaskTransferStateReq(STQ* pTq, SRpcMsg* pMsg) {
   int32_t remain = streamAlignTransferState(pTask);
   if (remain > 0) {
     tqDebug("s-task:%s receive upstream transfer state msg, remain:%d", pTask->id.idStr, remain);
+    streamMetaReleaseTask(pTq->pStreamMeta, pTask);
     return 0;
   }
 
@@ -1475,9 +1477,6 @@ int32_t tqProcessTaskDropReq(STQ* pTq, int64_t sversion, char* msg, int32_t msgL
   }
 
   streamMetaUnregisterTask(pTq->pStreamMeta, pReq->taskId);
-  streamMetaRemoveTask(pTq->pStreamMeta, pReq->taskId);
-
-  streamMetaReleaseTask(pTq->pStreamMeta, pTask);
   streamMetaReleaseTask(pTq->pStreamMeta, pTask);
   return 0;
 }

source/libs/stream/src/streamExec.c

@@ -408,14 +408,10 @@ static int32_t streamTransferStateToStreamTask(SStreamTask* pTask) {
   streamTaskResumeFromHalt(pStreamTask);
 
   qDebug("s-task:%s fill-history task set status to be dropping, save the state into disk", pTask->id.idStr);
-
   int32_t taskId = pTask->id.taskId;
-  pTask->status.taskStatus = TASK_STATUS__DROPPING;
 
   // free it and remove it from disk meta-store
-  streamMetaUnregisterTask(pMeta, pTask->id.taskId);
-  streamMetaRemoveTask(pMeta, taskId);
-  streamMetaReleaseTask(pMeta, pTask);
+  streamMetaUnregisterTask(pMeta, taskId);
 
   // save to disk
   taosWLockLatch(&pMeta->lock);

source/libs/stream/src/streamMeta.c

@@ -226,10 +226,7 @@ int32_t streamMetaSaveTask(SStreamMeta* pMeta, SStreamTask* pTask) {
 }
 
 int32_t streamMetaRemoveTask(SStreamMeta* pMeta, int32_t taskId) {
-  taosWLockLatch(&pMeta->lock);
   int32_t code = tdbTbDelete(pMeta->pTaskDb, &taskId, sizeof(taskId), pMeta->txn);
-  taosWUnLockLatch(&pMeta->lock);
-
   if (code != 0) {
     qError("vgId:%d failed to remove task:0x%x from metastore, code:%s", pMeta->vgId, taskId, tstrerror(terrno));
   } else {
@@ -248,6 +245,8 @@ int32_t streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTa
       return -1;
     }
 
+    taosArrayPush(pMeta->pTaskList, &pTask->id.taskId);
+
     if (streamMetaSaveTask(pMeta, pTask) < 0) {
       tFreeStreamTask(pTask);
       return -1;
@@ -257,8 +256,6 @@ int32_t streamMetaRegisterTask(SStreamMeta* pMeta, int64_t ver, SStreamTask* pTa
       tFreeStreamTask(pTask);
       return -1;
     }
-
-    taosArrayPush(pMeta->pTaskList, &pTask->id.taskId);
   } else {
     return 0;
   }
@@ -361,13 +358,15 @@ int32_t streamMetaUnregisterTask(SStreamMeta* pMeta, int32_t taskId) {
     ASSERT(pTask->status.timerActive == 0);
 
     int32_t num = taosArrayGetSize(pMeta->pTaskList);
-    qDebug("s-task:%s set the drop task flag, remain running s-task:%d", pTask->id.idStr, num - 1);
     doRemoveIdFromList(pMeta, num, pTask->id.taskId);
 
     // remove the ref by timer
     if (pTask->triggerParam != 0) {
       taosTmrStop(pTask->schedTimer);
     }
+
+    streamMetaRemoveTask(pMeta, taskId);
+    streamMetaReleaseTask(pMeta, pTask);
   } else {
     qDebug("vgId:%d failed to find the task:0x%x, it may have been dropped already", pMeta->vgId, taskId);
   }

source/libs/stream/src/streamTask.c

@@ -211,7 +211,7 @@ static void freeItem(void* p) {
 }
 
 void tFreeStreamTask(SStreamTask* pTask) {
-  qDebug("free s-task:%s", pTask->id.idStr);
+  qDebug("free s-task:%s, %p", pTask->id.idStr, pTask);
 
   int32_t status = atomic_load_8((int8_t*)&(pTask->status.taskStatus));
   if (pTask->inputQueue) {

tests/script/tsim/stream/basic3.sim

 system sh/stop_dnodes.sh
 system sh/deploy.sh -n dnode1 -i 1
-system sh/cfg.sh -n dnode1 -c debugflag -v 131
 system sh/cfg.sh -n dnode1 -c keepColumnName -v 1
 system sh/exec.sh -n dnode1 -s start
 
-sleep 5000
-
+sleep 1000
 sql connect
 
 print ========== interval\session\state window
@@ -32,7 +30,6 @@ sql create stream streamd6 into streamt6 as select ca, _wstart,_wend, count(*),
 
 
 sql alter local 'keepColumnName' '1'
-
 sql CREATE STABLE `meters_test_data` (`ts` TIMESTAMP, `close` FLOAT, `parttime` TIMESTAMP, `parttime_str` VARCHAR(32)) TAGS (`id` VARCHAR(32));
 
 sql_error create stream realtime_meters fill_history 1 into realtime_meters as select last(parttime),first(close),last(close) from meters_test_data partition by tbname state_window(parttime_str);
@@ -58,17 +55,13 @@ sql_error create stream streamd11 into streamd11 as select _wstart, _wend, count
 sql alter local 'keepColumnName' '0'
 
 sql create stream realtime_meters fill_history 1 into realtime_meters as select last(parttime),first(close),last(close) from meters_test_data partition by tbname state_window(parttime_str);
-
 sql desc realtime_meters;
-
 if $rows == 0 then
   return -1
 endi
 
-sql create stream streamd7 into streamt7 as select  _wstart, _wend, count(*), first(ca), last(ca) from t1 interval(10s);
-
+sql create stream streamd7 into streamt7 as select  _wstart t1, _wend t2, count(*), first(ca), last(ca) from t1 interval(10s);
 sql desc streamt7;
-
 if $rows == 0 then
   return -1
 endi
@@ -76,12 +69,11 @@ endi
 sql create stream streamd71 into streamt71 as select _wstart, _wend, count(*) as ca, first(ca), last(ca) as c2 from t1 interval(10s);
 
 sql desc streamt71;
-
 if $rows == 0 then
   return -1
 endi
 
-sleep 3000
+sleep 1000
 
 sql drop stream if exists streamd1;
 sql drop stream if exists streamd2;
@@ -93,23 +85,19 @@ sql drop stream if exists streamd6;
 sql create stream streamd10 into streamd10 as select _wstart, _wend, count(*), first(ca), last(cb) as c2 from t1 interval(10s);
 
 sql desc streamd10;
-
 if $rows == 0 then
   return -1
 endi
 
 sql_error create stream streamd11 into streamd11 as select _wstart, _wend, count(*), last(ca), last(ca) from t1 interval(10s);
 
-
 sql create stream streamd12 into streamd12 as select _wstart, _wend, count(*), last(ca), last(cb) as c2 from t1 interval(10s);
-
 sql desc streamd12;
 
 if $rows == 0 then
   return -1
 endi
 
-
 _OVER:
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 print =============== check