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Code Activity

MDEV-24660 MYSQL_BIN_LOG::cleanup(): Assertion `b->xid_count == 0'

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The shutdown time assert was caused by untimely deactivation of
the binlog background thread and related structs destruction.
It could specifically occur when a transaction is replication unsafe
and has to be completed with a ROLLBACK event in binlog.

This gets fixed with the binlog background thread stop relocation
to a point and user transactions have been completed.
A test case is added to binlog.binlog_checkpoint which
also receives as a bonus a minor correction to reactivate a MDEV-4322 test
case that originally required a shutdown phase (that ceased to do).
This commit is contained in:
Andrei
2022-08-16 20:03:15 +03:00
parent 5563202089
commit bc12478a9a
4 changed files with 110 additions and 14 deletions
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52
mysql-test/suite/binlog/r/binlog_checkpoint.result
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@@ -129,6 +129,9 @@ master-bin.000004 #
master-bin.000005 #
master-bin.000006 #
SET debug_sync = 'reset';
SET GLOBAL max_binlog_size= @old_max_binlog_size;
SET GLOBAL innodb_flush_log_at_trx_commit= @old_innodb_flush_log_at_trx_commit;
# restart
*** MDEV-7402: 'reset master' hangs, waits for signalled COND_xid_list ***
connect con3,localhost,root,,;
SET debug_sync="reset_logs_after_set_reset_master_pending SIGNAL reset_master_ready WAIT_FOR reset_master_cont";
@@ -144,7 +147,48 @@ SET debug_sync="now SIGNAL reset_master_cont";
connection con3;
connection default;
SET debug_sync = 'reset';
DROP TABLE t1, t2;
SET GLOBAL max_binlog_size= @old_max_binlog_size;
SET GLOBAL innodb_flush_log_at_trx_commit= @old_innodb_flush_log_at_trx_commit;
SET debug_sync = 'reset';
*** MDEV-24660: MYSQL_BIN_LOG::cleanup(): Assertion `b->xid_count == 0' failed in MYSQL_BIN_LOG::cleanup
SET @old_max_binlog_size= @@global.max_binlog_size;
SET GLOBAL max_binlog_size= 4096;
connect con_24660,localhost,root,,;
FLUSH LOGS;
SET @@session.binlog_format = STATEMENT;
CREATE TABLE tm (a INT) ENGINE = myisam;
call mtr.add_suppression("Table './test/tm' is marked as crashed");
call mtr.add_suppression("Checking table");
XA START 'xa1';
INSERT INTO t1 VALUES (2, 1);
INSERT INTO tm SET a = 1;
XA END 'xa1';
connection default;
SET GLOBAL debug_dbug="+d,only_kill_system_threads_no_loop";
# restart
** Proof of shutdown caused ROLLBACK-completed transaction
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000002 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
master-bin.000002 # Gtid_list # # []
master-bin.000002 # Binlog_checkpoint # # master-bin.000001
master-bin.000002 # Binlog_checkpoint # # master-bin.000002
master-bin.000002 # Gtid # # GTID #-#-#
master-bin.000002 # Query # # use `test`; CREATE TABLE tm (a INT) ENGINE = myisam
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `mtr`; INSERT INTO test_suppressions (pattern) VALUES ( NAME_CONST('pattern',_latin1'Table \'./test/tm\' is marked as crashed' COLLATE 'latin1_swedish_ci'))
master-bin.000002 # Query # # COMMIT
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `mtr`; INSERT INTO test_suppressions (pattern) VALUES ( NAME_CONST('pattern',_latin1'Checking table' COLLATE 'latin1_swedish_ci'))
master-bin.000002 # Query # # COMMIT
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `test`; INSERT INTO tm SET a = 1
master-bin.000002 # Query # # COMMIT
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `test`; INSERT INTO t1 VALUES (2, 1)
master-bin.000002 # Query # # use `test`; INSERT INTO t1 VALUES (3, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
master-bin.000002 # Query # # ROLLBACK
master-bin.000002 # Rotate # # master-bin.000003;pos=POS
SELECT * FROM tm;
a
1
SELECT * FROM t1 WHERE a = 3;
a b
DROP TABLE t1, t2, tm;