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
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