mariadb/mysql-test/suite/galera_3nodes_sr/t/MDEV-26707.test

#
# MDEV-26707: SR transaction rolls back locally, but not in cluster
#
# This test excercises the following scenario:
# Initially we have a three node cluster where node 2 has an active
# SR transaction that has replicated one fragment.
# Node 3 disconnects from the cluster, followed by disconnect of node 2.
# Node 2 attempts to COMMIT its transaction, but fails because node 2 is
# non-primary. This failure causes the transaction to rolled back locally
# (node 2 can't communicate with the cluster at this point, so rollback
# fragment cannot be sent successfully)
# Node 3 joins back creating non-primary view (node 1, node 3).
# Then node 2 joins back creating primary view (node 1, node 1, node 3).
# If bug is present, we have that node 2 has rolled back locally, while
# the same transaction is still active nodes 1 and 3, leaving entries
# in their wsrep_streaming_log tables.
#

--source include/galera_cluster.inc
--source include/have_debug_sync.inc

--connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1
--connect node_2a, 127.0.0.1, root, , test, $NODE_MYPORT_2
--connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3
--connect node_3a, 127.0.0.1, root, , test, $NODE_MYPORT_3

# Save original auto_increment_offset values.
--let $node_1=node_1
--let $node_2=node_2
--let $node_3=node_3
--source ../galera/include/auto_increment_offset_save.inc

--connection node_1
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY);

--connection node_2
SET SESSION wsrep_trx_fragment_size=1;
BEGIN;
INSERT INTO t1 VALUES (21);

--connection node_1
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_streaming_log;

--connection node_2
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_streaming_log;

--connection node_3
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_streaming_log;

#
# Disconnect node 3 from cluster
#
--connection node_3a
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 1';
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SET SESSION wsrep_sync_wait = DEFAULT;

--connection node_1a
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SET SESSION wsrep_sync_wait = DEFAULT;

--connection node_2a
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SET SESSION wsrep_sync_wait = DEFAULT;

#
# Issue commit block COMMIT before certification on node 2
#
--connection node_2
SET DEBUG_SYNC = 'wsrep_before_certification SIGNAL before_cert WAIT_FOR continue';
--send COMMIT

--connection node_2a
SET DEBUG_SYNC = 'now WAIT_FOR before_cert';

#
# Disconnect node 2
#
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 1';
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SET SESSION wsrep_sync_wait = DEFAULT;


#
# Unblock COMMIT and expect it to fail
#
SET DEBUG_SYNC = 'now SIGNAL continue';

--connection node_2
--error ER_ERROR_DURING_COMMIT
--reap

--connection node_2a
SET DEBUG_SYNC = 'RESET';

--connection node_1a
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SET SESSION wsrep_sync_wait = DEFAULT;


#
# Reconnect node 3
#
--connection node_3a
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 0';
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_streaming_log;
SET SESSION wsrep_sync_wait = DEFAULT;

--connection node_1a
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_streaming_log;
SET SESSION wsrep_sync_wait = DEFAULT;


#
# Reconnect node 2
#
--connection node_2a
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 0';
--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
--source include/galera_wait_ready.inc
SET SESSION wsrep_sync_wait = DEFAULT;

--connection node_1a
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
--source include/galera_wait_ready.inc
SET SESSION wsrep_sync_wait = DEFAULT;

--connection node_3a
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
--source include/wait_condition.inc
--source include/galera_wait_ready.inc
SET SESSION wsrep_sync_wait = DEFAULT;


#
# Expect no entries in wsrep_streaming_log
#
--connection node_1a
--let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log
--source include/wait_condition.inc
SELECT COUNT(*) AS EXPECT_0 FROM  mysql.wsrep_streaming_log;
--connection node_2a
--let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log
--source include/wait_condition.inc
SELECT COUNT(*) AS EXPECT_0 FROM  mysql.wsrep_streaming_log;
--connection node_3a
--let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log
--source include/wait_condition.inc
SELECT COUNT(*) AS EXPECT_0 FROM  mysql.wsrep_streaming_log;


--connection node_1
DROP TABLE t1;

--source ../galera/include/auto_increment_offset_restore.inc