We saw a case where the recovery stats reported `recovered_bytes` greater than `length_in_bytes` for one file:

```
GET /_recovery?detailed

200 OK
...
{
  "name": "_buk.fdt",
  "length_in_bytes": 26891307173,
  "reused": false,
  "recovered_in_bytes": 35324928266,
  "recovered_from_snapshot_in_bytes": 8433621093
}
...
```

NB `35324928266 == 26891307173 + 8433621093`

This causes Elasticsearch to compute a negative value for the reserved space on the target node of this recovery, which prevents stats APIs from working. This appears to be caused by a network-level failure which triggers a retry without first cancelling an ongoing download of a different file with the same name from the snapshot repository.

---

### Workaround

Restart the target node to clear these stats.
server/src/main/java/org/elasticsearch/index/shard/IndexShard.java
boolean success = false;
        try {
            final Engine.Searcher newSearcher = wrapSearcher(searcher, fieldUsageTracker.createSession(), readerWrapper);
            assert newSearcher != null;
            success = true;
            return newSearcher;
        } catch (IOException ex) {
            throw new ElasticsearchException("failed to wrap searcher", ex);
        } finally {
            if (success == false) {
                Releasables.closeWhileHandlingException(searcher);
            }
        }
    }
    static Engine.Searcher wrapSearcher(
        Engine.Searcher engineSearcher,
        ShardFieldUsageTracker.FieldUsageStatsTrackingSession fieldUsageStatsTrackingSession,
        @Nullable CheckedFunction<DirectoryReader, DirectoryReader, IOException> readerWrapper
    ) throws IOException {
        final ElasticsearchDirectoryReader elasticsearchDirectoryReader = ElasticsearchDirectoryReader.getElasticsearchDirectoryReader(
            engineSearcher.getDirectoryReader()
        );
        if (elasticsearchDirectoryReader == null) {
            throw new IllegalStateException("Can't wrap non elasticsearch directory reader");
        }
        if (readerWrapper == null) {
            readerWrapper = r -> r;
        }
        NonClosingReaderWrapper nonClosingReaderWrapper = new NonClosingReaderWrapper(engineSearcher.getDirectoryReader());