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
if (rawTimestampFieldRange == ShardLongFieldRange.EMPTY) {
            return ShardLongFieldRange.EMPTY;
        }
        return ShardLongFieldRange.of(rawTimestampFieldRange.getMin(), rawTimestampFieldRange.getMax());
    }
    /**
     * perform the last stages of recovery once all translog operations are done.
     * note that you should still call {@link #postRecovery(String)}.
     */
    public void finalizeRecovery() {
        recoveryState().setStage(RecoveryState.Stage.FINALIZE);
        Engine engine = getEngine();
        engine.refresh("recovery_finalization");
        engine.config().setEnableGcDeletes(true);
    }
    /**
     * Returns {@code true} if this shard can ignore a recovery attempt made to it (since the already doing/done it)
     */
    public boolean ignoreRecoveryAttempt() {
        IndexShardState state = state(); 
        return state == IndexShardState.POST_RECOVERY
            || state == IndexShardState.RECOVERING
            || state == IndexShardState.STARTED
            || state == IndexShardState.CLOSED;
    }
    public void readAllowed() throws IllegalIndexShardStateException {
        IndexShardState state = this.state; 
        if (readAllowedStates.contains(state) == false) {
            throw new IllegalIndexShardStateException(
                shardId,