Botond Dénes 9e48237b86 evictable_reader_v2: terminate active range tombstones on reader recreation ...

Reader recreation messes with the continuity of the mutation fragment
stream because it breaks snapshot isolation. We cannot guarantee that a
range tombstone or even the partition started before will continue after
too. So we have to make sure to wrap up all loose threads when
recreating the reader. We already close uncontinued partitions. This
commit also takes care of closing any range tombstone started by
unconditionally emitting a null range tombstone. This is legal to do,
even if no range tombstone was in effect.

2022-02-21 12:29:24 +02:00

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