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
"expected warn log about restore failure",
                    RecoverySourceHandler.class.getName(),
                    Level.WARN,
                    "failed to recover file [*] from snapshot, will recover from primary instead"
                )
            );
            targetNode = internalCluster().startDataOnlyNode();
            assertAcked(
                client().admin()
                    .indices()
                    .prepareUpdateSettings(indexName)
                    .setSettings(Settings.builder().put("index.routing.allocation.require._name", targetNode))
                    .get()
            );
            ensureGreen();
            mockLogAppender.assertAllExpectationsMatched();
        } finally {
            Loggers.removeAppender(recoverySourceHandlerLogger, mockLogAppender);
            mockLogAppender.stop();
        }
        RecoveryState recoveryState = getLatestPeerRecoveryStateForShard(indexName, 0);
        assertPeerRecoveryWasSuccessful(recoveryState, sourceNode, targetNode);
        assertDocumentsAreEqual(indexName, numDocs);
    }
    public void testRateLimitingIsEnforced() throws Exception {
        try {
            updateSetting(INDICES_RECOVERY_MAX_BYTES_PER_SEC_SETTING.getKey(), "50k");
            String sourceNode = internalCluster().startDataOnlyNode();
            String indexName = randomAlphaOfLength(10).toLowerCase(Locale.ROOT);
            createIndex(