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BUG#30435 loading large LOAD DATA INFILE breaks slave with

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read_buffer_size set on master
BUG#33413 show binlog events fails if binlog has event size of close
          to max_allowed_packet


The size of Append_block replication event was determined solely by
read_buffer_size whereas the rest of replication code deals with
max_allowed_packet.
When the former parameter was set to larger than the latter there were
two artifacts: the master could not read events from binlog;
show master events did not show.

Fixed with 
- fragmenting the used io-cached buffer into pieces each size of less
  than max_allowed_packet (bug#30435)
- incrementing show-binlog-events handling thread's max_allowed_packet
  with the max estimated for the replication header size
This commit is contained in:
aelkin/elkin@koti.dsl.inet.fi
2007-12-21 22:34:43 +02:00
parent c2f00cc3f9
commit 0ca3250e59
6 changed files with 134 additions and 25 deletions
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51
mysql-test/t/rpl_loaddata_map.test Normal file
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@@ -0,0 +1,51 @@
#
# check replication of load data with the server parameters subjected to
# read_buffer_size > max_allowed_packet
#
# BUG#30435 loading large LOAD DATA INFILE breaks slave with
# read_buffer_size set on master
# BUG#33413 show binlog events fails if binlog has event size of close
# to max_allowed_packet
source include/master-slave.inc;
source include/have_innodb.inc;
--disable_query_log
let $rows= 5000;
create table t1 (id int not null primary key auto_increment);
while($rows)
{
eval insert into t1 values (null);
dec $rows;
}
eval select * into outfile '$MYSQLTEST_VARDIR/tmp/bug30435_5k.txt' from t1;
flush logs;
--enable_query_log
connection master;
create table t2 (id int not null primary key auto_increment);
show variables like 'max_allowed_packet' /* 8K */;
show variables like 'read_buffer_size' /* 9K */;
eval load data infile '$MYSQLTEST_VARDIR/tmp/bug30435_5k.txt' into table t2;
select count(*) from t2 /* 5 000 */;
# the binglog will show fragmented Append_block events
--let $binlog_start=98
--replace_column 5 #
--replace_regex /\/\* xid=.* \*\//\/* XID *\//
--eval show binlog events in 'master-bin.000002' from $binlog_start
sync_slave_with_master;
#connection slave;
select count(*) from t2 /* 5 000 */;
connection master;
drop table t1, t2;
sync_slave_with_master;
remove_file $MYSQLTEST_VARDIR/tmp/bug30435_5k.txt;
--echo end of the tests