[Tarantool-patches] [PATCH 0/6] Raft auto-commit

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

The patchset implements Raft auto-commit feature, so when a new
leader is elected, it clears the limbo queue after the old leader.

There are 4 preparatory patches for that, and 1 follow-up not
related to the auto-commit - the last commit fixes the issue 5395
about a crash in the limbo, which started failing on every run of
the tests now.

Branch: http://github.com/tarantool/tarantool/tree/gerold103/gh-5339-raft-auto-commit
Issue: https://github.com/tarantool/tarantool/issues/5339

@ChangeLog
* When election is enabled, a newly elected leader will automatically finish all the synchronous transactions, created by the old leader (gh-5339).

Vladislav Shpilevoy (6):
  test: add '_stress' suffix to election_qsync test
  raft: factor out the code to wakeup worker fiber
  raft: new candidate should wait for leader death
  raft: introduce on_update trigger
  raft: auto-commit transactions of the old leader
  qsync: reset confirmed lsn in limbo on owner change

 src/box/box.cc                                |  42 ++++-
 src/box/box.h                                 |   3 +-
 src/box/lua/ctl.c                             |   2 +-
 src/box/raft.c                                |  58 ++++--
 src/box/raft.h                                |  13 ++
 src/box/txn_limbo.c                           |   1 +
 test/replication/election_qsync.result        | 177 ++++++++++--------
 test/replication/election_qsync.test.lua      | 129 ++++++-------
 test/replication/election_qsync_stress.result | 127 +++++++++++++
 .../election_qsync_stress.test.lua            |  72 +++++++
 test/replication/suite.ini                    |   2 +-
 11 files changed, 460 insertions(+), 166 deletions(-)
 create mode 100644 test/replication/election_qsync_stress.result
 create mode 100644 test/replication/election_qsync_stress.test.lua

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