A user (on 7.17.7) reported to me a situation where they were attempting to delete a snapshot and would get the log message `deleting snapshots [snapshot-test] from repository [my-snapshots]` but then no further messages at `INFO` or above; enabling some internal logging indicated some low-level timeouts:

```
[DEBUG][com.amazonaws.latency    ] [instance-0123456789] MaxRetriesExceeded=[true], ServiceName=[Amazon S3], ServiceEndpoint=[https://REDACTED/], Exception=[java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out],...
```

This was enough for the user to go and investigate some performance issues in their repository, but I find the lack of logging concerning. Eventually the cluster state contains no ongoing snapshot deletion, but there is nothing in the logs to indicate that anything didn't work. The deletion API request had already timed out by this point so we can't return an error that way either. I'm opening this issue to make sure we investigate the missing logging.
server/src/main/java/org/elasticsearch/snapshots/SnapshotsService.java
throw new SnapshotException(
                        targetSnapshot,
                        "Can't clone index [" + indexId + "] because its snapshot was not successful."
                    );
                }
            }
            
            repository.getRepositoryData(ActionListener.wrap(repositoryData -> {
                for (IndexId index : indices) {
                    executor.execute(ActionRunnable.supply(shardCountListener, () -> {
                        final IndexMetadata metadata = repository.getSnapshotIndexMetaData(repositoryData, sourceSnapshot, index);
                        return Tuple.tuple(index, metadata.getNumberOfShards());
                    }));
                }
            }, onFailure));
        }, onFailure));
        
        allShardCountsListener.addListener(
            ActionListener.wrap(counts -> executeConsistentStateUpdate(repository, repoData -> new ClusterStateUpdateTask() {
                private SnapshotsInProgress.Entry updatedEntry;
                @Override
                public ClusterState execute(ClusterState currentState) {
                    final SnapshotsInProgress snapshotsInProgress = SnapshotsInProgress.get(currentState);
                    final String repoName = cloneEntry.repository();
                    final List<SnapshotsInProgress.Entry> existingEntries = snapshotsInProgress.forRepo(repoName);
                    final List<SnapshotsInProgress.Entry> updatedEntries = new ArrayList<>(existingEntries.size());
                    final String localNodeId = currentState.nodes().getLocalNodeId();
                    final ShardGenerations shardGenerations = repoData.shardGenerations();
                    for (SnapshotsInProgress.Entry existing : existingEntries) {
                        if (cloneEntry.snapshot().getSnapshotId().equals(existing.snapshot().getSnapshotId())) {