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.
x-pack/plugin/snapshot-based-recoveries/src/internalClusterTest/java/org/elasticsearch/xpack/snapshotbasedrecoveries/recovery/SnapshotBasedIndexRecoveryIT.java
recoverySnapshotFileRequests.add((RecoverySnapshotFileRequest) request);
                    recoverSnapshotFileRequestReceived.countDown();
                    respondToRecoverSnapshotFile.await();
                    handler.messageReceived(request, channel, task);
                }
            );
            testCase.execute(
                indices,
                sourceNode,
                targetNode,
                targetMockTransportService,
                recoverySnapshotFileRequests,
                recoverSnapshotFileRequestReceived::await,
                respondToRecoverSnapshotFile::countDown
            );
        } finally {
            updateSetting(INDICES_RECOVERY_MAX_CONCURRENT_SNAPSHOT_FILE_DOWNLOADS_PER_NODE.getKey(), null);
            updateSetting(INDICES_RECOVERY_MAX_CONCURRENT_SNAPSHOT_FILE_DOWNLOADS.getKey(), null);
        }
    }
    public void testFallbacksToSourceNodeWhenLicenseIsInvalid() throws Exception {
        ConfigurableMockSnapshotBasedRecoveriesPlugin.denyRecoveryFromSnapshot(this::checkRecoveryIsPerformedFromSourceNode);
    }
    private void checkRecoveryIsPerformedFromSourceNode() throws Exception {
        internalCluster().ensureAtLeastNumDataNodes(2);
        String indexName = randomAlphaOfLength(10).toLowerCase(Locale.ROOT);
        createIndex(
            indexName,
            Settings.builder()
                .put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)