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Bug#58546 test rpl_packet timeout failure sporadically on PB

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rpl_packet got a timeout failure sporadically on PB when stopping
slave. The real reason of this bug is that STOP SLAVE stopped
IO thread first and then stopped SQL thread. It was
possible that IO thread stopped after replicating part of a
transaction which SQL thread was executing. SQL thread would
be hung if the transaction could not be rolled back safely.
            
After this patch, STOP SLAVE will stop SQL thread first and then stop IO
thread, which guarantees that IO thread will fetch the reset of the
events of the transaction that SQL thread is executing, so that SQL
thread can finish the transaction if it cannot be rolled back safely.
            
Added below auxiliary files to make the test code neater.
restart_slave_sql.inc
rpl_connection_master.inc
rpl_connection_slave.inc
rpl_connection_slave1.inc
This commit is contained in:
Libing Song
2011-01-19 01:23:49 +08:00
parent cf0e22fe75
commit 5d75729c92
9 changed files with 189 additions and 13 deletions
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23
sql/sql_repl.cc
View File

@ -21,6 +21,7 @@
#include "log_event.h"
#include "rpl_filter.h"
#include <my_dir.h>
#include "debug_sync.h"
int max_binlog_dump_events = 0; // unlimited
my_bool opt_sporadic_binlog_dump_fail = 0;
@ -556,6 +557,20 @@ impossible position";
}
#endif
DBUG_EXECUTE_IF("dump_thread_wait_before_send_xid",
{
if ((*packet)[EVENT_TYPE_OFFSET+1] == XID_EVENT)
{
net_flush(net);
const char act[]=
"now "
"wait_for signal.continue";
DBUG_ASSERT(opt_debug_sync_timeout > 0);
DBUG_ASSERT(!debug_sync_set_action(current_thd,
STRING_WITH_LEN(act)));
}
});
if ((*packet)[EVENT_TYPE_OFFSET+1] == FORMAT_DESCRIPTION_EVENT)
{
binlog_can_be_corrupted= test((*packet)[FLAGS_OFFSET+1] &
@ -572,6 +587,14 @@ impossible position";
goto err;
}
DBUG_EXECUTE_IF("dump_thread_wait_before_send_xid",
{
if ((*packet)[EVENT_TYPE_OFFSET+1] == XID_EVENT)
{
net_flush(net);
}
});
DBUG_PRINT("info", ("log event code %d",
(*packet)[LOG_EVENT_OFFSET+1] ));
if ((*packet)[LOG_EVENT_OFFSET+1] == LOAD_EVENT)