Server IP : 104.21.38.3 / Your IP : 162.158.108.8 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /www/server/mysql/src/mysql-test/suite/binlog/t/ |
Upload File : |
################################################################################ # BUG#25379659 MASTER MAY BINLOG A WRONG LAST_COMMITED # # Transactions could binlog a last_commited smaller than expected. With the # wrong last_commited values, the transactions which sould be applied # sequentially could be applied parallel. That caused applier errors or data # inconsistency. # # When committing a transaction, its last_commited is set to the value of # max_committed_transaction. max_committed_transaction is the maximum # sequence_number of committed transactions. It is maintained just before # committing each transaction to engine. If its sequence_number is not # SEQ_UNINIT then updates max_committed_transaction accordingly. # # However, it checked wrong sequence_number(the sequence_number of the # leader thread's transaction instead of the sequence_number of the transaction). # That caused that max_committed_transaction was only updated in time for leader # thread's transaction. The update for following transactions were delay to # finish_commit() which was after the transaction commited to engine. # # The test verifys last_committed is corret in the bug situation. # # Step 1. Use debug sync to gurantee that commit queue has two transactions. # Step 2. Use debug sync to pause the second transaction when it enters # finshi_commit() # Step 3. Execute a transaction and check if its last_committed is correct. ################################################################################ --source include/have_binlog_format_statement.inc --source include/have_debug_sync.inc # Reset sequence_number and last_committed, so we can check the exact number # Make sure it starts from master-bin.000001 RESET MASTER; CREATE TABLE t1(c1 INT PRIMARY KEY, c2 INT) ENGINE = InnoDB; # Make the INSERT to wait for another INSERT into the flush queue SET DEBUG_SYNC = "bgc_after_enrolling_for_commit_stage SIGNAL insert1_ready WAIT_FOR continue_commit_stage"; --send INSERT INTO t1 VALUES(1, 1) --connect(conn1, localhost, root) --connect(conn2, localhost, root) --connection conn1 # Make sure above INSERT is the leader SET DEBUG_SYNC = "now WAIT_FOR insert1_ready"; # Record the INSERT's binlog position --let $binlog_pos= query_get_value(SHOW MASTER STATUS, Position, 1) # Pause the INSERT when it enters finishi_commit() SET DEBUG_SYNC = "reached_finish_commit WAIT_FOR insert2_finish"; --send INSERT INTO t1 VALUES(2, 1) # Wait until above INSERT is binlogged --connection conn2 --let $show_statement= SHOW MASTER STATUS --let $field= Position --let $condition= != '$binlog_pos' --source include/wait_show_condition.inc # Signal insert1 to finish the commit group SET DEBUG_SYNC = "now SIGNAL continue_commit_stage"; --connection default --reap UPDATE t1 SET c2 = 2 WHERE c1 = 2; SET DEBUG_SYNC = "now SIGNAL insert2_finish"; --connection conn1 --reap --connection default # INSERT(2,1): sequence_number = 3 # UPDATE: sequence_number = 4, last_committed = 3 --let $binlog_file= master-bin.000001 --let $logical_timestamps= 3 4 --source include/assert_logical_timestamps.inc DROP TABLE t1;