Type:
Priority:
Resolution:
Fixed
Affects Version/s:
10.5 , 10.6 , 10.8(EOL) , 10.9(EOL) , 10.10(EOL) , 10.11 , 11.0(EOL)
From knielsen :
There is a small window between when the SQL thread reports itself running, and when it clears any error set by a previous error stop. Thus a race exists where include/rpl_end.inc can see the previous error being set, causing it to fail the test.
This can be observed by the following test failure with rpl.rpl_xa_prepare_gtid_fail:
https://buildbot.mariadb.org/#/builders/208/builds/12453
10.6 fe89df426
rpl.rpl_xa_prepare_gtid_fail 'innodb,row' w17 [ fail ]
Test ended at 2023-05-02 10:11:23
CURRENT_TEST: rpl.rpl_xa_prepare_gtid_fail
mysqltest: In included file "./include/check_slave_param.inc":
included from ./include/check_slave_no_error.inc at line 24:
included from ./include/rpl_end.inc at line 74:
included from /home/buildbot/amd64-ubuntu-1804-bigtest/build/mysql-test/suite/rpl/t/rpl_xa_prepare_gtid_fail.test at line 106:
At line 31: Wrong value for slave parameter Last_SQL_Errno
The result from queries just before the failure was:
< snip >
master-bin.000001 590 Table_map 1 636 table_id: 32 (test.t1)
master-bin.000001 636 Write_rows_v1 1 678 table_id: 32 flags: STMT_END_F
master-bin.000001 678 Xid 1 709 COMMIT /* xid=154 */
master-bin.000001 709 Gtid 1 754 XA START X'31',X'',1 GTID 0-1-100
master-bin.000001 754 Annotate_rows 1 807 update t1 set b=b+10 where a=1
master-bin.000001 807 Table_map 1 853 table_id: 32 (test.t1)
master-bin.000001 853 Update_rows_v1 1 905 table_id: 32 flags: STMT_END_F
master-bin.000001 905 Query 1 990 XA END X'31',X'',1
master-bin.000001 990 XA_prepare 1 1027 XA PREPARE X'31',X'',1
master-bin.000001 1027 Gtid 1 1070 GTID 0-1-101
master-bin.000001 1070 Query 1 1158 XA COMMIT X'31',X'',1
master-bin.000001 1158 Gtid 1 1200 GTID 0-1-102
master-bin.000001 1200 Query 1 1317 use `test`; DROP TABLE `t1` /* generated by server */
**** SHOW RELAYLOG EVENTS on server_1 ****
relaylog_name = 'No such row'
SHOW RELAYLOG EVENTS IN 'No such row';
Log_name Pos Event_type Server_id End_log_pos Info
connection server_2;
Wrong value for Last_SQL_Errno. Expected '0', got '1942'
The slave error log shows an abnormal server shutdown with "initiated by: unknown":
2023-05-02 10:11:23 0 [Note] /home/buildbot/amd64-ubuntu-1804-bigtest/build/sql/mariadbd (initiated by: unknown): Normal shutdown
2023-05-02 10:11:23 24 [Note] Error reading relay log event: slave SQL thread was killed
2023-05-02 10:11:23 24 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 1317; GTID position '0-1-102', master: 127.0.0.1:16300
2023-05-02 10:11:23 23 [Note] Slave I/O thread killed during or after a reconnect done to recover from failed read
2023-05-02 10:11:23 23 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 1317; GTID position 0-1-102, master 127.0.0.1:16300
2023-05-02 10:11:23 0 [Note] InnoDB: FTS optimize thread exiting.
2023-05-02 10:11:23 0 [Note] InnoDB: Starting shutdown...
causes
MDEV-32651
Lost Debug_sync signal in rpl_sql_thd_start_errno_cleared
Closed
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Bug
Critical
