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| author | Manish Kumar <manish.4.kumar@oracle.com> | 2012-05-21 12:57:39 +0530 |
|---|---|---|
| committer | Manish Kumar <manish.4.kumar@oracle.com> | 2012-05-21 12:57:39 +0530 |
| commit | 1605b7f68f30038ea0a9ce16e688f5827057f64f (patch) | |
| tree | e2cc824480d8f8df482d14d8b25129df48df0bdf /mysql-test/suite/rpl/r | |
| parent | 781137c0dddc3c9315a8d40e579fe82f6a900d61 (diff) | |
| download | mariadb-git-1605b7f68f30038ea0a9ce16e688f5827057f64f.tar.gz | |
BUG#12400221 - 60926: BINARY LOG EVENTS LARGER THAN MAX_ALLOWED_PACKET
Problem
========
SQL statements close to the size of max_allowed_packet produce binary
log events larger than max_allowed_packet.
The reason why this failure is occuring is because the event length is
more than the total size of the max_allowed_packet + max_event_header
length. Now since the event length exceeds this size master Dump
thread is unable to send the packet on to the slave.
That can happen e.g with row-based replication in Update_rows event.
Fix
====
The problem was fixed by increasing the max_allowed_packet for the
slave's threads (IO/SQL) by increasing it to 1GB.
This is done using the new server option included which is used to
regulate the max_allowed_packet of the slave thread (IO/SQL).
This causes the large packets to be received by the slave and apply
it successfully.
sql/log_event.h:
Added the new option in the log_event.h file.
sql/mysqld.cc:
Added a new option to the server.
sql/slave.cc:
Increasing the session max_allowed_packet to a large value ,
i.e. not taking global(max_allowed) into consideration, for the slave's threads.
Diffstat (limited to 'mysql-test/suite/rpl/r')
| -rw-r--r-- | mysql-test/suite/rpl/r/rpl_log_pos.result | 2 | ||||
| -rw-r--r-- | mysql-test/suite/rpl/r/rpl_packet.result | 11 |
2 files changed, 7 insertions, 6 deletions
diff --git a/mysql-test/suite/rpl/r/rpl_log_pos.result b/mysql-test/suite/rpl/r/rpl_log_pos.result index 91d307008f0..b2224dcd725 100644 --- a/mysql-test/suite/rpl/r/rpl_log_pos.result +++ b/mysql-test/suite/rpl/r/rpl_log_pos.result @@ -9,7 +9,7 @@ change master to master_log_pos=MASTER_LOG_POS; Read_Master_Log_Pos = '75' start slave; include/wait_for_slave_io_error.inc [errno=1236] -Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master'' +Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'binlog truncated in the middle of event'' include/stop_slave_sql.inc show master status; File Position Binlog_Do_DB Binlog_Ignore_DB diff --git a/mysql-test/suite/rpl/r/rpl_packet.result b/mysql-test/suite/rpl/r/rpl_packet.result index 7a7f8141ac8..6d68a094594 100644 --- a/mysql-test/suite/rpl/r/rpl_packet.result +++ b/mysql-test/suite/rpl/r/rpl_packet.result @@ -1,7 +1,7 @@ include/master-slave.inc [connection master] -call mtr.add_suppression("Slave I/O: Got a packet bigger than 'max_allowed_packet' bytes, Error_code: 1153"); -call mtr.add_suppression("Slave I/O: Got fatal error 1236 from master when reading data from binary log:"); +call mtr.add_suppression("Slave I/O: Got a packet bigger than 'slave_max_allowed_packet' bytes, Error_code: 1153"); +call mtr.add_suppression("Log entry on master is longer than slave_max_allowed_packet"); drop database if exists DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________; create database DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________; SET @@global.max_allowed_packet=1024; @@ -30,14 +30,14 @@ include/start_slave.inc CREATE TABLE `t1` (`f1` LONGTEXT) ENGINE=MyISAM; INSERT INTO `t1`(`f1`) VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2048'); include/wait_for_slave_io_error.inc [errno=1153] -Last_IO_Error = 'Got a packet bigger than 'max_allowed_packet' bytes' +Last_IO_Error = 'Got a packet bigger than 'slave_max_allowed_packet' bytes' include/stop_slave_sql.inc include/rpl_reset.inc DROP TABLE t1; CREATE TABLE t1 (f1 int PRIMARY KEY, f2 LONGTEXT, f3 LONGTEXT) ENGINE=MyISAM; INSERT INTO t1(f1, f2, f3) VALUES(1, REPEAT('a', @@global.max_allowed_packet), REPEAT('b', @@global.max_allowed_packet)); -include/wait_for_slave_io_error.inc [errno=1236] -Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master'' +include/wait_for_slave_io_error.inc [errno=1153] +Last_IO_Error = 'Got a packet bigger than 'slave_max_allowed_packet' bytes' STOP SLAVE; RESET SLAVE; RESET MASTER; @@ -52,6 +52,7 @@ SET @@global.max_allowed_packet= 1024; Warnings: Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SET @@global.net_buffer_length= 1024; +SET @@global.slave_max_allowed_packet= 1073741824; DROP TABLE t1; RESET SLAVE; include/rpl_end.inc |