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/indices/recovery/RecoveryTarget.java
state().getIndex().setFileDetailsComplete(); 
            state().getTranslog().totalOperations(totalTranslogOps);
            indexShard().openEngineAndSkipTranslogRecovery();
            return null;
        });
    }
    @Override
    public void finalizeRecovery(final long globalCheckpoint, final long trimAboveSeqNo, ActionListener<Void> listener) {
        ActionListener.completeWith(listener, () -> {
            indexShard.updateGlobalCheckpointOnReplica(globalCheckpoint, "finalizing recovery");
            
            indexShard.sync();
            indexShard.persistRetentionLeases();
            if (trimAboveSeqNo != SequenceNumbers.UNASSIGNED_SEQ_NO) {
                
                
                
                
                
                indexShard.rollTranslogGeneration();
                
                indexShard.afterWriteOperation();
                indexShard.trimOperationOfPreviousPrimaryTerms(trimAboveSeqNo);
            }
            if (hasUncommittedOperations()) {
                indexShard.flush(new FlushRequest().force(true).waitIfOngoing(true));
            }
            indexShard.finalizeRecovery();
            return null;
        });