fix: fix task sched crash issue

include/util/tsched.h

@@ -17,6 +17,7 @@
 #define _TD_UTIL_SCHED_H_
 
 #include "os.h"
+#include "tdef.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,6 +31,24 @@ typedef struct SSchedMsg {
   void *thandle;
 } SSchedMsg;
 
+
+typedef struct {
+  char          label[TSDB_LABEL_LEN];
+  tsem_t        emptySem;
+  tsem_t        fullSem;
+  TdThreadMutex queueMutex;
+  int32_t       fullSlot;
+  int32_t       emptySlot;
+  int32_t       queueSize;
+  int32_t       numOfThreads;
+  TdThread     *qthread;
+  SSchedMsg    *queue;
+  int8_t        stop;
+  void         *pTmrCtrl;
+  void         *pTimer;
+} SSchedQueue;
+
+
 /**
  * Create a thread-safe ring-buffer based task queue and return the instance. A thread
  * pool will be created to consume the messages in the queue.
@@ -38,7 +57,7 @@ typedef struct SSchedMsg {
  * @param label the label of the queue
  * @return the created queue scheduler
  */
-void *taosInitScheduler(int32_t capacity, int32_t numOfThreads, const char *label);
+void *taosInitScheduler(int32_t capacity, int32_t numOfThreads, const char *label, SSchedQueue* pSched);
 
 /**
  * Create a thread-safe ring-buffer based task queue and return the instance.

source/libs/index/src/index.c

@@ -62,7 +62,7 @@ static void indexDestroy(void* sIdx);
 
 void indexInit() {
   // refactor later
-  indexQhandle = taosInitScheduler(INDEX_QUEUE_SIZE, INDEX_NUM_OF_THREADS, "index");
+  indexQhandle = taosInitScheduler(INDEX_QUEUE_SIZE, INDEX_NUM_OF_THREADS, "index", NULL);
   indexRefMgt = taosOpenRef(1000, indexDestroy);
 }
 void indexCleanup() {

source/libs/qcom/src/queryUtil.c

@@ -96,12 +96,12 @@ bool tIsValidSchema(struct SSchema* pSchema, int32_t numOfCols, int32_t numOfTag
   return true;
 }
 
-static void* pTaskQueue = NULL;
+static SSchedQueue pTaskQueue = {0};
 
 int32_t initTaskQueue() {
   int32_t queueSize = tsMaxShellConns * 2;
-  pTaskQueue = taosInitScheduler(queueSize, tsNumOfTaskQueueThreads, "tsc");
-  if (NULL == pTaskQueue) {
+  void *p = taosInitScheduler(queueSize, tsNumOfTaskQueueThreads, "tsc", &pTaskQueue);
+  if (NULL == p) {
     qError("failed to init task queue");
     return -1;
   }
@@ -111,7 +111,7 @@ int32_t initTaskQueue() {
 }
 
 int32_t cleanupTaskQueue() {
-  taosCleanUpScheduler(pTaskQueue);
+  taosCleanUpScheduler(&pTaskQueue);
   return 0;
 }
 
@@ -134,7 +134,7 @@ int32_t taosAsyncExec(__async_exec_fn_t execFn, void* execParam, int32_t* code)
   schedMsg.thandle = execParam;
   schedMsg.msg = code;
 
-  taosScheduleTask(pTaskQueue, &schedMsg);
+  taosScheduleTask(&pTaskQueue, &schedMsg);
   return 0;
 }
 

source/util/src/tsched.c

@@ -22,30 +22,16 @@
 
 #define DUMP_SCHEDULER_TIME_WINDOW 30000  // every 30sec, take a snap shot of task queue.
 
-typedef struct {
-  char          label[TSDB_LABEL_LEN];
-  tsem_t        emptySem;
-  tsem_t        fullSem;
-  TdThreadMutex queueMutex;
-  int32_t       fullSlot;
-  int32_t       emptySlot;
-  int32_t       queueSize;
-  int32_t       numOfThreads;
-  TdThread     *qthread;
-  SSchedMsg    *queue;
-  bool          stop;
-  void         *pTmrCtrl;
-  void         *pTimer;
-} SSchedQueue;
-
 static void *taosProcessSchedQueue(void *param);
 static void  taosDumpSchedulerStatus(void *qhandle, void *tmrId);
 
-void *taosInitScheduler(int32_t queueSize, int32_t numOfThreads, const char *label) {
-  SSchedQueue *pSched = (SSchedQueue *)taosMemoryCalloc(sizeof(SSchedQueue), 1);
-  if (pSched == NULL) {
-    uError("%s: no enough memory for pSched", label);
-    return NULL;
+void *taosInitScheduler(int32_t queueSize, int32_t numOfThreads, const char *label, SSchedQueue *pSched) {
+  if (NULL == pSched) {
+    pSched = (SSchedQueue *)taosMemoryCalloc(sizeof(SSchedQueue), 1);
+    if (pSched == NULL) {
+      uError("%s: no enough memory for pSched", label);
+      return NULL;
+    }
   }
 
   pSched->queue = (SSchedMsg *)taosMemoryCalloc(sizeof(SSchedMsg), queueSize);
@@ -86,7 +72,7 @@ void *taosInitScheduler(int32_t queueSize, int32_t numOfThreads, const char *lab
     return NULL;
   }
 
-  pSched->stop = false;
+  atomic_store_8(&pSched->stop, 0);
   for (int32_t i = 0; i < numOfThreads; ++i) {
     TdThreadAttr attr;
     taosThreadAttrInit(&attr);
@@ -107,7 +93,7 @@ void *taosInitScheduler(int32_t queueSize, int32_t numOfThreads, const char *lab
 }
 
 void *taosInitSchedulerWithInfo(int32_t queueSize, int32_t numOfThreads, const char *label, void *tmrCtrl) {
-  SSchedQueue *pSched = taosInitScheduler(queueSize, numOfThreads, label);
+  SSchedQueue *pSched = taosInitScheduler(queueSize, numOfThreads, label, NULL);
 
   if (tmrCtrl != NULL && pSched != NULL) {
     pSched->pTmrCtrl = tmrCtrl;
@@ -131,7 +117,7 @@ void *taosProcessSchedQueue(void *scheduler) {
       uFatal("wait %s fullSem failed(%s)", pSched->label, strerror(errno));
       ASSERT(0);
     }
-    if (pSched->stop) {
+    if (atomic_load_8(&pSched->stop)) {
       break;
     }
 
@@ -172,6 +158,11 @@ void taosScheduleTask(void *queueScheduler, SSchedMsg *pMsg) {
     return;
   }
 
+  if (atomic_load_8(&pSched->stop)) {
+    uError("sched is already stopped, msg:%p is dropped", pMsg);
+    return;
+  }
+
   if ((ret = tsem_wait(&pSched->emptySem)) != 0) {
     uFatal("wait %s emptySem failed(%s)", pSched->label, strerror(errno));
     ASSERT(0);
@@ -202,7 +193,10 @@ void taosCleanUpScheduler(void *param) {
 
   uDebug("start to cleanup %s schedQsueue", pSched->label);
   
-  pSched->stop = true;
+  atomic_store_8(&pSched->stop, 1);
+
+  taosMsleep(200);
+  
   for (int32_t i = 0; i < pSched->numOfThreads; ++i) {
     if (taosCheckPthreadValid(pSched->qthread[i])) {
       tsem_post(&pSched->fullSem);
@@ -226,7 +220,7 @@ void taosCleanUpScheduler(void *param) {
 
   if (pSched->queue) taosMemoryFree(pSched->queue);
   if (pSched->qthread) taosMemoryFree(pSched->qthread);
-  taosMemoryFree(pSched);  // fix memory leak
+  //taosMemoryFree(pSched);
 }
 
 // for debug purpose, dump the scheduler status every 1min.

source/util/src/ttimer.c

@@ -555,7 +555,7 @@ static void taosTmrModuleInit(void) {
     return;
   }
 
-  tmrQhandle = taosInitScheduler(10000, taosTmrThreads, "tmr");
+  tmrQhandle = taosInitScheduler(10000, taosTmrThreads, "tmr", NULL);
   taosInitTimer(taosTimerLoopFunc, MSECONDS_PER_TICK);
 
   tmrDebug("timer module is initialized, number of threads: %d", taosTmrThreads);