| Server IP : 88.99.149.37 / Your IP : 216.73.216.141 Web Server : nginx/1.31.2 System : Linux server-88-99-149-37 6.12.0-124.56.5.el10_1.x86_64 #1 SMP PREEMPT_DYNAMIC Fri May 15 06:12:08 EDT 2026 x86_64 User : muralimurth ( 1015) PHP Version : 8.4.23 Disable Function : exec,system,passthru,shell_exec,proc_close,proc_open,dl,popen,show_source,posix_kill,posix_mkfifo,posix_getpwuid,posix_setpgid,posix_setsid,posix_setuid,posix_setgid,posix_seteuid,posix_setegid,posix_uname MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/local/mysql/mysql-test/main/ |
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# # Make sure pending LOCK TABLES doesn't block BACKUP STAGE # CREATE TABLE t1(a INT); LOCK TABLE t1 READ; # connect con1,localhost,root,,; SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL ready'; LOCK TABLE t1 WRITE; # connect con2,localhost,root,,; SET DEBUG_SYNC= 'now WAIT_FOR ready'; BACKUP STAGE START; BACKUP STAGE FLUSH; BACKUP STAGE BLOCK_DDL; BACKUP STAGE END; disconnect con2; # connection default; UNLOCK TABLES; # connection con1; UNLOCK TABLES; disconnect con1; # connection default; DROP TABLE t1; SET DEBUG_SYNC= 'RESET'; # # Demonstrates a deadlock if BACKUP namespace is reorder after SCHEMA. # Culprit is ALTER TABLE taking SCHEMA lock on target database after # BACKUP lock was acquired. # CREATE DATABASE test2; CREATE TABLE t1(a INT) ENGINE=InnoDB; connect con1,localhost,root,,; BACKUP STAGE START; connection default; SET DEBUG_SYNC='alter_opened_table SIGNAL ready WAIT_FOR go'; ALTER TABLE t1 RENAME TO test2.t1; connection con1; SET DEBUG_SYNC='now WAIT_FOR ready'; SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL ready1'; BACKUP STAGE BLOCK_DDL; connect con2,localhost,root,,; SET DEBUG_SYNC='now WAIT_FOR ready1'; SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL go'; DROP DATABASE test2; connection default; connection con1; disconnect con1; connection con2; disconnect con2; connection default; SET DEBUG_SYNC='reset';