#
# MDEV-21479 : Galera 4 unable to query cluster state if not primary component
#
--source include/galera_cluster.inc
--source include/have_innodb.inc


--echo # Lets first see that we can access wsrep schema tables
--echo # Node1
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
SELECT COUNT(*) AS EXPECT_1 from mysql.wsrep_cluster;
SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;

--connection node_2
--echo # Node2
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;

--connection node_1
# Make node 1 tolerate split-brain
SET GLOBAL wsrep_provider_options = 'pc.ignore_sb=true';
SET GLOBAL wsrep_provider_options = 'pc.weight=2';

# Desync and disconnect node 2 from the PC:
--connection node_2
--echo # Desync and disconnect node_2
SET @@global.wsrep_desync = 1;
SET SESSION wsrep_dirty_reads=1;
SET SESSION wsrep_sync_wait=0;
SET GLOBAL wsrep_provider_options = 'gmcast.isolate=1';
--let $wait_condition = SELECT VARIABLE_VALUE = 'non-Primary' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_status';
--source include/wait_condition.inc
SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_status';

# Wait until node 2 disappears from the PC:
--connection node_1
--echo # Waiting until node_2 is not part of cluster anymore
--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
--source include/wait_condition.inc
--let $wait_condition = SELECT VARIABLE_VALUE = 'Primary' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_status';
--source include/wait_condition.inc

--echo # Verify that we can access wsrep schema tables
--echo # Node1
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster_members;

--connection node_2
#
# Here node2 remembers old configuration even when we are non-Primary
#
--echo # Node2
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;

# Reconnect node 2 to the PC:
--connection node_2
--echo # Reconnect node_2 back to cluster
SET GLOBAL wsrep_provider_options = 'gmcast.isolate=0';
SET wsrep_dirty_reads=0;
--let $wait_condition = SELECT VARIABLE_VALUE = 'Primary' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_status';
--source include/wait_condition.inc
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
--source include/wait_condition.inc
--let $wait_condition = SELECT VARIABLE_VALUE = 'ON' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_ready';
--source include/wait_condition.inc

# Must return 0:
SHOW STATUS LIKE 'wsrep_desync_count';

# Resync node_2, should pass:
SET @@global.wsrep_desync = 0;

--let $wait_condition = SELECT VARIABLE_VALUE = 'Synced' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_state_comment';
--source include/wait_condition.inc

CALL mtr.add_suppression("WSREP: Protocol violation\\. JOIN message sender .+ ?is not in state transfer \\(SYNCED\\)\\. Message ignored\\.");

--connection node_1
--echo # Wait until both nodes are back to cluster
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
--source include/wait_condition.inc
SET GLOBAL wsrep_provider_options = 'pc.ignore_sb=false';
SET GLOBAL wsrep_provider_options = 'pc.weight=1';

--echo # Verify that we can access wsrep schema tables
--echo # Node1
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;

--connection node_2
--echo # Node2
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;