Re: [Tarantool-patches] [PATCH 2/2] vinyl: clean-up read views if *_build_history() fails

[Vladislav Shpilevoy <v.shpilevoy@tarantool.org>]

On 10/04/2020 23:45, Nikita Pettik wrote:
> On 10 Apr 15:47, Nikita Pettik wrote:
> 
> I've also found that vy_read_view_merge() can fail as well during
> processing array of read views. Thus, we should clean-up unprocessed
> read views as well. Diff:
> 
> diff --git a/src/box/vy_write_iterator.c b/src/box/vy_write_iterator.c
> index 7d8c60d73..165b422fd 100644
> --- a/src/box/vy_write_iterator.c
> +++ b/src/box/vy_write_iterator.c
> @@ -986,8 +986,11 @@ vy_write_iterator_build_read_views(struct vy_write_iterator *stream, int *count)
>                 if (rv->history == NULL)
>                         continue;
>                 if (vy_read_view_merge(stream, hint, rv,
> -                                      is_first_insert) != 0)
> +                                      is_first_insert) != 0) {
> +                       while (rv >= &stream->read_views[0]) {
> +                               rv->history = NULL;
> +                               rv--;
> +                       }
>                         goto error;

The same question as to the previous fix - shouldn't that be
cleaned by the function, which created the mess, by
vy_read_view_merge() internally?

> +               }
>                 assert(rv->history == NULL);
>                 if (rv->tuple == NULL)
>                         continue;
>