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
* @param listener the listener to wrap
     * @return the wrapped listener
     */
    private ActionListener<Releasable> wrapPrimaryOperationPermitListener(final ActionListener<Releasable> listener) {
        return listener.delegateFailure((l, r) -> {
            if (replicationTracker.isPrimaryMode()) {
                l.onResponse(r);
            } else {
                r.close();
                l.onFailure(new ShardNotInPrimaryModeException(shardId, state));
            }
        });
    }
    private void asyncBlockOperations(ActionListener<Releasable> onPermitAcquired, long timeout, TimeUnit timeUnit) {
        final Releasable forceRefreshes = refreshListeners.forceRefreshes();
        final ActionListener<Releasable> wrappedListener = ActionListener.wrap(r -> {
            forceRefreshes.close();
            onPermitAcquired.onResponse(r);
        }, e -> {
            forceRefreshes.close();
            onPermitAcquired.onFailure(e);
        });
        try {
            indexShardOperationPermits.blockOperations(wrappedListener, timeout, timeUnit, ThreadPool.Names.GENERIC);
        } catch (Exception e) {
            forceRefreshes.close();
            throw e;
        }
    }
    /**