fix: fix invalid dist count

source/dnode/vnode/src/tsdb/tsdbRead.c

@@ -488,7 +488,7 @@ static int32_t initFilesetIterator(SFilesetIter* pIter, SArray* aDFileSet, STsdb
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t filesetIteratorNext(SFilesetIter* pIter, STsdbReader* pReader, bool *hasNext) {
+static int32_t filesetIteratorNext(SFilesetIter* pIter, STsdbReader* pReader, bool* hasNext) {
   bool    asc = ASCENDING_TRAVERSE(pIter->order);
   int32_t step = asc ? 1 : -1;
   pIter->index += step;
@@ -4688,6 +4688,11 @@ int32_t tsdbGetFileBlocksDistInfo(STsdbReader* pReader, STableBlockDistInfo* pTa
   pTableBlockInfo->numOfVgroups = 1;
 
   // find the start data block in file
+
+  tsdbAcquireReader(pReader);
+  if (pReader->suspended) {
+    tsdbReaderResume(pReader);
+  }
   SReaderStatus* pStatus = &pReader->status;
 
   STsdbCfg* pc = &pReader->pTsdb->pVnode->config.tsdbCfg;
@@ -4749,7 +4754,7 @@ int32_t tsdbGetFileBlocksDistInfo(STsdbReader* pReader, STableBlockDistInfo* pTa
     //    tsdbDebug("%p %d blocks found in file for %d table(s), fid:%d, %s", pReader, numOfBlocks, numOfTables,
     //              pReader->pFileGroup->fid, pReader->idStr);
   }
-
+  tsdbReleaseReader(pReader);
   return code;
 }