fix: return error on failing to truncate raft log

source/libs/sync/src/syncRaftLog.c

@@ -316,29 +316,6 @@ static int32_t raftLogTruncate(struct SSyncLogStore* pLogStore, SyncIndex fromIn
   SSyncLogStoreData* pData = pLogStore->data;
   SWal*              pWal = pData->pWal;
 
-  // need not truncate
-  SyncIndex wallastVer = walGetLastVer(pWal);
-  if (fromIndex > wallastVer) {
-    return 0;
-  }
-
-  // need not truncate
-  SyncIndex walCommitVer = walGetCommittedVer(pWal);
-  if (fromIndex <= walCommitVer) {
-    return 0;
-  }
-
-  // delete from cache
-  for (SyncIndex index = fromIndex; index <= wallastVer; ++index) {
-    SLRUCache* pCache = pData->pSyncNode->pLogStore->pCache;
-    LRUHandle* h = taosLRUCacheLookup(pCache, &index, sizeof(index));
-    if (h) {
-      sNTrace(pData->pSyncNode, "cache delete index:%" PRId64, index);
-
-      taosLRUCacheRelease(pData->pSyncNode->pLogStore->pCache, h, true);
-    }
-  }
-
   int32_t code = walRollback(pWal, fromIndex);
   if (code != 0) {
     int32_t     err = terrno;

source/libs/wal/src/walWrite.c

@@ -105,7 +105,7 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   wInfo("vgId:%d, wal rollback for version %" PRId64, pWal->cfg.vgId, ver);
   int64_t code;
   char    fnameStr[WAL_FILE_LEN];
-  if (ver > pWal->vers.lastVer || ver < pWal->vers.commitVer || ver <= pWal->vers.snapshotVer) {
+  if (ver > pWal->vers.lastVer || ver <= pWal->vers.commitVer || ver <= pWal->vers.snapshotVer) {
     terrno = TSDB_CODE_WAL_INVALID_VER;
     taosThreadMutexUnlock(&pWal->mutex);
     return -1;