fix: add log for snapshot writer rollback

source/dnode/vnode/src/meta/metaSnapshot.c

@@ -161,7 +161,10 @@ int32_t metaSnapWriterClose(SMetaSnapWriter** ppWriter, int8_t rollback) {
   SMetaSnapWriter* pWriter = *ppWriter;
 
   if (rollback) {
+    metaInfo("vgId:%d, meta snapshot writer close and rollback start ", TD_VID(pWriter->pMeta->pVnode));
     code = metaAbort(pWriter->pMeta);
+    metaInfo("vgId:%d, meta snapshot writer close and rollback finished, code:0x%x", TD_VID(pWriter->pMeta->pVnode),
+             code);
     if (code) goto _err;
   } else {
     code = metaCommit(pWriter->pMeta, pWriter->pMeta->txn);

source/dnode/vnode/src/meta/metaTable.c

@@ -710,6 +710,9 @@ int metaUpdateCtimeIdx(SMeta *pMeta, const SMetaEntry *pME) {
   if (metaBuildCtimeIdxKey(&ctimeKey, pME) < 0) {
     return 0;
   }
+  metaDebug("vgId:%d, start to save ctime:%" PRId64 " uid:%" PRId64 " ct:%" PRId64, TD_VID(pMeta->pVnode), pME->version,
+            pME->uid, ctimeKey.ctime);
+
   return tdbTbInsert(pMeta->pCtimeIdx, &ctimeKey, sizeof(ctimeKey), NULL, 0, pMeta->txn);
 }