fix start/stop/restart udfd

source/dnode/mgmt/implement/src/dmHandle.c

@@ -220,13 +220,11 @@ static int32_t dmSpawnUdfd(SDnode *pDnode);
 
 void dmUdfdExit(uv_process_t *process, int64_t exitStatus, int termSignal) {
   dInfo("udfd process exited with status %" PRId64 ", signal %d", exitStatus, termSignal);
-  uv_close((uv_handle_t*)process, NULL);
   SDnode *pDnode = process->data;
-  SUdfdData *pData = &pDnode->udfdData;
-  if (atomic_load_8(&pData->stopping) != 0) {
-    dDebug("udfd process exit due to stopping");
+  if (exitStatus == 0 && termSignal == 0) {
+    dInfo("udfd process exit due to SIGINT");
   } else {
-    uv_close((uv_handle_t*)&pData->ctrlPipe, NULL);
+    dInfo("udfd process restart");
     dmSpawnUdfd(pDnode);
   }
 }
@@ -248,6 +246,7 @@ static int32_t dmSpawnUdfd(SDnode *pDnode) {
   options.file = path;
 
   options.exit_cb = dmUdfdExit;
+
   SUdfdData *pData = &pDnode->udfdData;
   uv_pipe_init(&pData->loop, &pData->ctrlPipe, 1);
 
@@ -260,6 +259,8 @@ static int32_t dmSpawnUdfd(SDnode *pDnode) {
   options.stdio_count = 3;
   options.stdio = child_stdio;
 
+  options.flags = UV_PROCESS_DETACHED;
+
   char dnodeIdEnvItem[32] = {0};
   char thrdPoolSizeEnvItem[32] = {0};
   snprintf(dnodeIdEnvItem, 32, "%s=%d", "DNODE_ID", pDnode->data.dnodeId);
@@ -284,24 +285,31 @@ static void dmUdfdCloseWalkCb(uv_handle_t* handle, void* arg) {
   }
 }
 
-void dmWatchUdfd(void *args) {
+static void dmUdfdStopAsyncCb(uv_async_t *async) {
+  SDnode *pDnode = async->data;
+  SUdfdData *pData = &pDnode->udfdData;
+  uv_stop(&pData->loop);
+}
+
+static void dmWatchUdfd(void *args) {
   SDnode *pDnode = args;
   SUdfdData *pData = &pDnode->udfdData;
   uv_loop_init(&pData->loop);
+  uv_async_init(&pData->loop, &pData->stopAsync, dmUdfdStopAsyncCb);
+  pData->stopAsync.data = pDnode;
   int32_t err = dmSpawnUdfd(pDnode);
   atomic_store_32(&pData->spawnErr, err);
   uv_barrier_wait(&pData->barrier);
   uv_run(&pData->loop, UV_RUN_DEFAULT);
-  err = uv_loop_close(&pData->loop);
-  while (err == UV_EBUSY) {
-    uv_walk(&pData->loop, dmUdfdCloseWalkCb, NULL);
-    uv_run(&pData->loop, UV_RUN_DEFAULT);
-    err = uv_loop_close(&pData->loop);
-  }
+  uv_loop_close(&pData->loop);
+
+  uv_walk(&pData->loop, dmUdfdCloseWalkCb, NULL);
+  uv_run(&pData->loop, UV_RUN_DEFAULT);
+  uv_loop_close(&pData->loop);
   return;
 }
 
-int32_t dmStartUdfd(SDnode *pDnode) {
+static int32_t dmStartUdfd(SDnode *pDnode) {
   SUdfdData *pData = &pDnode->udfdData;
   if (pData->startCalled) {
     dInfo("dnode-mgmt start udfd already called");
@@ -309,30 +317,27 @@ int32_t dmStartUdfd(SDnode *pDnode) {
   }
   pData->startCalled = true;
   uv_barrier_init(&pData->barrier, 2);
-  pData->stopping = 0;
   uv_thread_create(&pData->thread, dmWatchUdfd, pDnode);
   uv_barrier_wait(&pData->barrier);
   pData->needCleanUp = true;
   return pData->spawnErr;
 }
 
-int32_t dmStopUdfd(SDnode *pDnode) {
+static int32_t dmStopUdfd(SDnode *pDnode) {
   dInfo("dnode-mgmt to stop udfd. need cleanup: %d, spawn err: %d",
         pDnode->udfdData.needCleanUp, pDnode->udfdData.spawnErr);
   SUdfdData *pData = &pDnode->udfdData;
   if (!pData->needCleanUp) {
     return 0;
   }
-  atomic_store_8(&pData->stopping, 1);
 
   uv_barrier_destroy(&pData->barrier);
   if (pData->spawnErr == 0) {
     uv_process_kill(&pData->process, SIGINT);
   }
-  uv_stop(&pData->loop);
+  uv_async_send(&pData->stopAsync);
   uv_thread_join(&pData->thread);
 
-  atomic_store_8(&pData->stopping, 0);
   return 0;
 }
 

source/dnode/mgmt/interface/inc/dmDef.h

@@ -151,8 +151,8 @@ typedef struct SUdfdData {
   uv_barrier_t  barrier;
   uv_process_t  process;
   int           spawnErr;
-  int8_t        stopping;
   uv_pipe_t     ctrlPipe;
+  uv_async_t    stopAsync;
 } SUdfdData;
 
 typedef struct SDnode {

source/libs/function/src/udfd.c

@@ -586,7 +586,7 @@ static int32_t udfdRun() {
   udfdCloseClientRpc();
   uv_mutex_destroy(&global.udfsMutex);
   taosHashCleanup(global.udfsHash);
-  return code;
+  return 0;
 }
 
 int main(int argc, char *argv[]) {