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bug#19402 SQL close to the size of the max_allowed_packet fails on the slave

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comments are fixed as was suggested in reviews.
This commit is contained in:
aelkin/elkin@dsl-hkibras-fe30f900-107.dhcp.inet.fi
2006-11-12 20:01:58 +02:00
parent fe5de9f5c3
commit 5a20c54201
3 changed files with 20 additions and 5 deletions
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6
sql/log_event.h
View File

@ -147,8 +147,10 @@ struct sql_ex_info
#define EXEC_LOAD_HEADER_LEN 4
#define DELETE_FILE_HEADER_LEN 4
/* amount of byte is contribution of replicaton protocol to a query
received from user when the query goes to binlog */
/*
Max number of possible extra bytes in a replication event compared to a
packet (i.e. a query) sent from client to master.
*/
#define MAX_LOG_EVENT_HEADER (LOG_EVENT_HEADER_LEN + /* write_header */ \
QUERY_HEADER_LEN + /* write_data */ \
NAME_LEN + 1)

13
sql/slave.cc
View File

@ -2618,8 +2618,13 @@ static int init_slave_thread(THD* thd, SLAVE_THD_TYPE thd_type)
SYSTEM_THREAD_SLAVE_SQL : SYSTEM_THREAD_SLAVE_IO;
thd->host_or_ip= "";
my_net_init(&thd->net, 0);
/*
Adding MAX_LOG_EVENT_HEADER_LEN to the max_allowed_packet on all
slave threads, since a replication event can become this much larger
than the corresponding packet (query) sent from client to master.
*/
thd->variables.max_allowed_packet= global_system_variables.max_allowed_packet
+ MAX_LOG_EVENT_HEADER; /* reentering secured through using global */
+ MAX_LOG_EVENT_HEADER; /* note, incr over the global not session var */
thd->net.read_timeout = slave_net_timeout;
thd->master_access= ~(ulong)0;
thd->priv_user = 0;
@ -3156,7 +3161,11 @@ slave_begin:
mi->host, mi->port,
IO_RPL_LOG_NAME,
llstr(mi->master_log_pos,llbuff));
/* post-net-init for slave */
/*
Adding MAX_LOG_EVENT_HEADER_LEN to the max_packet_size on the I/O
thread, since a replication event can become this much larger than
the corresponding packet (query) sent from client to master.
*/
mysql->net.max_packet_size= thd->net.max_packet_size+= MAX_LOG_EVENT_HEADER;
}
else

6
sql/sql_repl.cc
View File

@ -420,7 +420,11 @@ impossible position";
goto err;
}
packet->set("\0", 1, &my_charset_bin);
/* dump thread the whole header size of query_log_event */
/*
Adding MAX_LOG_EVENT_HEADER_LEN, since a binlog event can become
this larger than the corresponding packet (query) sent
from client to master.
*/
thd->variables.max_allowed_packet+= MAX_LOG_EVENT_HEADER;
while (!net->error && net->vio != 0 && !thd->killed)