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MDEV-18983 Port rpl_semi_sync_master_wait_for_slave_count from MySQL #4037

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MDEV-18983 Port rpl_semi_sync_master_wait_for_slave_count from MySQL #4037

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WIP

  • The Jira issue number for this PR is: MDEV-18983

An amazing description should answer some questions like:

  1. What problem is the patch trying to solve?
  2. If some output changed that is not visible in a test case, what was it looking like before the change and how it's looking with this patch applied?
  3. Do you think this patch might introduce side-effects in other parts of the server?

Description

TODO: fill description here

Release Notes

TODO
Include any changed system variables, status variables or behaviour. Optionally list any https://mariadb.com/kb/ pages that need changing.

How can this PR be tested?

TODO

PR quality check

  • This is a new feature or a refactoring, and the PR is based against the main branch.
  • This is a bug fix, and the PR is based against the earliest maintained branch in which the bug can be reproduced.
  • I checked the CODING_STANDARDS.md file and my PR conforms to this where appropriate.
  • For any trivial modifications to the PR, I am ok with the reviewer making the changes themselves.

ParadoxV5 added 2 commits May 6, 2025 20:31
@ParadoxV5
Deduplicate code in sql/semisync_master.cc
41ccf99 
* Create reüsable functions
  `is_no_slave()` & `Active_tranx::get_tranx_node()`
* Replace `Active_tranx::is_thd_waiter()`
  with equivalent method `is_tranx_end_pos()`
@ParadoxV5
MDEV-18983 Port rpl_semi_sync_master_wait_for_slave_count from MySQL
6cd2824 
WIP
@ParadoxV5 ParadoxV5 added MariaDB Corporation Replication Patches involved in replication labels May 7, 2025
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