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MDEV-23080: desync and pause node on BACKUP STAGE BLOCK_DDL

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make BACKUP STAGE behave as FTWRL, desyncing and pausing the node
to prevent BF threads (appliers) from interfering with blocking stages.
This is needed because BF threads don't respect BACKUP MDL locks.

Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
This commit is contained in:
Leandro Pacheco
2021-07-20 12:45:00 -03:00
committed by Jan Lindström
parent 389f5cf76f
commit 2b84e1c966
8 changed files with 231 additions and 5 deletions
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sql/sql_class.cc
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@@ -1281,6 +1281,7 @@ void THD::init()
m_wsrep_next_trx_id = WSREP_UNDEFINED_TRX_ID;
wsrep_replicate_GTID = false;
wsrep_aborter = 0;
wsrep_desynced_backup_stage= false;
#endif /* WITH_WSREP */
if (variables.sql_log_bin)