3dd9298b18
Added a test that makes sure the transaction replay cap is respected. Also improved the logging to show how many transaction replay attemps have been done and to log if a replay is not done due to too many attempts.
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/**
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* MXS-2456: Cap transaction replay attempts
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* https://jira.mariadb.org/browse/MXS-2456
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*/
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#include "testconnections.h"
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#define EXPECT(a) test.expect(a, "%s", "Assertion failed: " #a)
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void test_replay_ok(TestConnections& test)
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{
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Connection c = test.maxscales->rwsplit();
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EXPECT(c.connect());
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EXPECT(c.query("BEGIN"));
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EXPECT(c.query("SELECT 1"));
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EXPECT(c.query("SELECT SLEEP(15)"));
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// Block the node where the transaction was started
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test.repl->block_node(0);
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test.maxscales->wait_for_monitor();
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sleep(5);
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// Then block the node where the transaction replay is attempted before the last statement finishes
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test.repl->block_node(1);
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test.maxscales->wait_for_monitor();
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sleep(5);
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// The next query should succeed as we do two replay attempts
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test.expect(c.query("SELECT 2"), "Two transaction replays should work");
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// Reset the replication
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test.repl->unblock_node(1);
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test.repl->unblock_node(0);
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test.maxscales->wait_for_monitor();
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test.check_maxctrl("call command mariadbmon reset-replication MariaDB-Monitor server1");
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test.maxscales->wait_for_monitor();
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}
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void test_replay_failure(TestConnections& test)
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{
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Connection c = test.maxscales->rwsplit();
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c.connect();
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c.query("BEGIN");
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c.query("SELECT 1");
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c.query("SELECT SLEEP(15)");
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// Block the node where the transaction was started
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test.repl->block_node(0);
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test.maxscales->wait_for_monitor();
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sleep(5);
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// Then block the node where the first transaction replay is attempted
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test.repl->block_node(1);
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test.maxscales->wait_for_monitor();
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sleep(5);
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// Block the final node before the replay completes
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test.repl->block_node(2);
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test.maxscales->wait_for_monitor();
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sleep(5);
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// The next query should fail as we exceeded the cap of two replays
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test.expect(!c.query("SELECT 2"), "Three transaction replays should NOT work");
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// Reset the replication
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test.repl->unblock_node(2);
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test.repl->unblock_node(1);
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test.repl->unblock_node(0);
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test.maxscales->wait_for_monitor();
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test.check_maxctrl("call command mariadbmon reset-replication MariaDB-Monitor server1");
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test.maxscales->wait_for_monitor();
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}
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int main(int argc, char* argv[])
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{
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Mariadb_nodes::require_gtid(true);
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TestConnections test(argc, argv);
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test_replay_ok(test);
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test_replay_failure(test);
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return test.global_result;
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}
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