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Bug #42914 Log event that larger than max_allowed_packet results in stop of slave I/O thread,

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But there is no Last_IO_Error reported.

On the master, if a binary log event is larger than max_allowed_packet,
ER_MASTER_FATAL_ERROR_READING_BINLOG and the specific reason of this error is
sent to a slave when it requests a dump from the master, thus leading
the I/O thread to stop.

On a slave, the I/O thread stops when receiving a packet larger than max_allowed_packet.

In both cases, however, there was no Last_IO_Error reported.

This patch adds code to report the Last_IO_Error and exact reason before stopping the
I/O thread and also reports the case the out memory pops up while
handling packets from the master.
This commit is contained in:
2009-09-18 16:20:29 +08:00
parent ddd00a7771
commit 7079338e0e
5 changed files with 58 additions and 15 deletions
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14
sql/sql_repl.cc
View File

@ -623,7 +623,7 @@ impossible position";
*/
{
log.error=0;
bool read_packet = 0, fatal_error = 0;
bool read_packet = 0;
#ifndef DBUG_OFF
if (max_binlog_dump_events && !left_events--)
@ -645,7 +645,7 @@ impossible position";
*/
pthread_mutex_lock(log_lock);
switch (Log_event::read_log_event(&log, packet, (pthread_mutex_t*)0)) {
switch (error= Log_event::read_log_event(&log, packet, (pthread_mutex_t*) 0)) {
case 0:
/* we read successfully, so we'll need to send it to the slave */
pthread_mutex_unlock(log_lock);
@ -671,8 +671,8 @@ impossible position";
default:
pthread_mutex_unlock(log_lock);
fatal_error = 1;
break;
test_for_non_eof_log_read_errors(error, &errmsg);
goto err;
}
if (read_packet)
@ -701,12 +701,6 @@ impossible position";
*/
}
if (fatal_error)
{
errmsg = "error reading log entry";
my_errno= ER_MASTER_FATAL_ERROR_READING_BINLOG;
goto err;
}
log.error=0;
}
}