[TD-4034]when config changed,apply a commit msg then config will be applied

src/tsdb/src/tsdbCommit.c

@@ -90,6 +90,9 @@ static int  tsdbApplyRtn(STsdbRepo *pRepo);
 static int  tsdbApplyRtnOnFSet(STsdbRepo *pRepo, SDFileSet *pSet, SRtn *pRtn);
 
 void *tsdbCommitData(STsdbRepo *pRepo) {
+  if (pRepo->imem == NULL) {
+    return NULL;
+  }
   tsdbStartCommit(pRepo);
 
   // Commit to update meta file

src/tsdb/src/tsdbMain.c

@@ -268,6 +268,12 @@ int32_t tsdbConfigRepo(STsdbRepo *repo, STsdbCfg *pCfg) {
   repo->config_changed = true;
 
   pthread_mutex_unlock(&repo->save_mutex);
+
+  // schedule a commit msg then the new config will be applyed immediatly
+  if (tsdbLockRepo(repo) < 0) return -1;
+  tsdbScheduleCommit(repo);
+  if (tsdbUnlockRepo(repo) < 0) return -1;
+
   return 0;
 #if 0
   STsdbRepo *pRepo = (STsdbRepo *)repo;