fix sync bug

src/tsdb/src/tsdbFile.c

@@ -86,7 +86,7 @@ void *tsdbDecodeSMFileEx(void *buf, SMFile *pMFile) {
 }
 
 int tsdbApplyMFileChange(SMFile *from, SMFile *to) {
-  ASSERT(from != NULL || to != NULL);
+  if (from == NULL && to == NULL) return 0;
 
   if (from != NULL) {
     if (to == NULL) {

src/tsdb/src/tsdbSync.c

@@ -238,7 +238,7 @@ static int32_t tsdbSendMetaInfo(SSyncH *pSynch) {
     tlen = tlen + tsdbEncodeSMFileEx(NULL, pMFile) + sizeof(TSCKSUM);
   }
 
-  if (tsdbMakeRoom((void **)(&SYNC_BUFFER(pSynch)), tlen) < 0) {
+  if (tsdbMakeRoom((void **)(&SYNC_BUFFER(pSynch)), tlen + sizeof(tlen)) < 0) {
     tsdbError("vgId:%d, failed to makeroom while send metainfo since %s", REPO_ID(pRepo), tstrerror(terrno));
     return -1;
   }