# Verify deadlock between XA-PREPARE and BACKUP on the optimistic slave
--source include/have_debug.inc
--source include/have_debug_sync.inc
--source include/have_innodb.inc
# The test is not format specific, MIXED is required to optimize testing time
--source include/have_binlog_format_mixed.inc
--source include/master-slave.inc

--connection master
CREATE TABLE t (a INT) ENGINE = innodb;

--sync_slave_with_master
--source include/stop_slave.inc
SET STATEMENT sql_log_bin= 0 FOR ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
SET @old_parallel_threads= @@GLOBAL.slave_parallel_threads;
SET @old_parallel_mode   = @@GLOBAL.slave_parallel_mode;
SET @@global.slave_parallel_threads= 2;
SET @@global.slave_parallel_mode   = 'optimistic';

--connection master
--echo # MDEV-35110
SET @@gtid_seq_no=100;
insert into t set a=1;
xa start 'x';
  insert into t set a=2;
xa end 'x';
xa prepare 'x';

--connection slave
SET @@global.debug_dbug="+d,hold_worker_on_schedule";
start slave;
SET debug_sync = 'now WAIT_FOR reached_pause';
--let $wait_condition= SELECT count(*) = 1 FROM information_schema.processlist WHERE state LIKE "Waiting for prior transaction to commit"
--source include/wait_condition.inc

--connection slave1
backup stage start;
backup stage block_commit;

--connection slave
--let $wait_condition= SELECT count(*) = 1 FROM information_schema.processlist WHERE state LIKE "Waiting for backup lock"
SET debug_sync = 'now SIGNAL continue_worker';
--source include/wait_condition.inc
SET debug_sync = RESET;

--connection slave1
backup stage end;

--connection master
xa rollback 'x';

--sync_slave_with_master

--echo # Clean up.
--connection slave
--source include/stop_slave.inc
SET @@global.debug_dbug="";
SET @@global.slave_parallel_threads= @old_parallel_threads;
SET @@global.slave_parallel_mode   = @old_parallel_mode;

--source include/start_slave.inc

--connection server_1
DROP TABLE t;

--source include/rpl_end.inc