ClickHouse/docs/changelogs/v21.11.8.4-stable.md

ClickHouse release v21.11.8.4-stable FIXME as compared to v21.11.7.9-stable

Bug Fix (user-visible misbehaviour in official stable or prestable release)

• Backported in #32679: Fix unexpected projection removal when detaching parts. #32067 (Amos Bird).
• Backported in #32543: Some replication queue entries might hang for temporary_directories_lifetime (1 day by default) with Directory tmp_merge_<part_name> or Part ... (state Deleting) already exists, but it will be deleted soon or similar error. It's fixed. Fixes #29616. #32201 (Alexander Tokmakov).
• Backported in #32769: Fix sparse_hashed dict performance with sequential keys (wrong hash function). #32536 (Azat Khuzhin).
• Backported in #32635: Fix table lifetime (i.e. possible use-after-free) in case of parallel DROP TABLE and INSERT. #32572 (Azat Khuzhin).
• Backported in #32633: Fix possible exception at RabbitMQ storage startup by delaying channel creation. #32584 (Kseniia Sumarokova).
• Backported in #32891: Fix LOGICAL_ERROR when the target of a materialized view is a JOIN or a SET table. #32669 (Raúl Marín).
• Backported in #32792: fix crash when used fuzzBits with multiply same FixedString, Close #32737. #32755 (SuperDJY).