mirror of
https://github.com/MariaDB/server.git
synced 2025-11-27 05:41:41 +03:00
a97c190d95
When the semisync slave is being stopped with STOP SLAVE just after the master was shut down it attempts to reconnect with the master anyway per a semisync routine. Instead of an expected error the io-thread segfauls in mysql_real_connect() execution at !mysql->options.extension->async_context check trying to reach the extension's member while mysql->options.extension is actually and correctly NULL. Apparently not-NULL check for mysql->options.extension was missed and it's deployed by the patch to fix this issue. As a bonus it also tackles an assert Thread 0x7f16c72148c0 (LWP 24639) 0x00007f16c53b3bf2 in __GI___assert_fail (assertion=0x55a686117558 "global_status_var.global_memory_used == 0", file=0x55a6861171e8 "/home/andrei/MDB/WTs/10.3-clean/sql/mysqld.cc", line=2201, function=0x55a68611fa80 <mysqld_exit(int)::__PRETTY_FUNCTION__> "void mysqld_exit(int)") at assert.c:101 in a new test of the patch. The reason of the assert was insufficient cleanup in Repl_semi_sync_slave::kill_connection() which has a branch where a MYSQL instance was left out unfred.
34 lines
850 B
Plaintext
34 lines
850 B
Plaintext
include/master-slave.inc
|
|
[connection master]
|
|
connection master;
|
|
SET @@GLOBAL.rpl_semi_sync_master_enabled = 1;
|
|
connection slave;
|
|
include/stop_slave.inc
|
|
SET @@GLOBAL. rpl_semi_sync_slave_enabled = 1;
|
|
include/start_slave.inc
|
|
connection master;
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 SET a=1;
|
|
connection slave;
|
|
connection master;
|
|
# Shutdown master
|
|
include/rpl_stop_server.inc [server_number=1]
|
|
connection slave;
|
|
include/stop_slave.inc
|
|
# Restart master
|
|
include/rpl_start_server.inc [server_number=1]
|
|
connection slave;
|
|
include/stop_slave.inc
|
|
Warnings:
|
|
Note 1255 Slave already has been stopped
|
|
include/start_slave.inc
|
|
connection master;
|
|
SET @@GLOBAL.debug_dbug="";
|
|
SET @@GLOBAL. rpl_semi_sync_master_enabled = 0;
|
|
connection master;
|
|
DROP TABLE t1;
|
|
connection slave;
|
|
include/stop_slave.inc
|
|
SET @@GLOBAL. rpl_semi_sync_slave_enabled = 0;
|
|
include/rpl_end.inc
|