hi,
In order
to test "retry_transaction" in function
execute_single_transaction(), I change Relay_log_pos to make SQL thread insert
Duplicate entry, but I find it successed and do not report error!
so I debug the function
execute_single_transaction() and find the reason : at first time, the
insert Rows_log_event::do_apply_event() return 121, that means insert
fails. But when retry the insert Rows_log_event::do_apply_event(),it
return 0, that means insert success! it seems the
Rows_log_event::do_apply_event() do twice, but return different results. how
this happened? is it a bug of Rows_log_event::do_apply_event()
?
By the way, I do this test in
mysql-5.5.30, do mariaDB has the some problem?
2013-07-12
nanyi607rao