alter table disable keys fires assertion in applier

[Teemu Ollakka]

Debug build, log-bin=mysql-bin set, default table type InnoDB, two nodes running.

Assertion:

mysqld: sql_parse.cc:8366: wsrep_status_t wsrep_bf_apply_rbr(THD*, const uchar*, size_t): Assertion `buf_len != 0 || ((Rows_log_event *) ev)->get_flags(Rows_log_event::STMT_END_F)' failed.

Statements to reproduce:

mysql> drop table if exists foo;
mysql> create table foo (a int);
mysql> alter table foo disable keys;

More details:

The event causing assertion is Query_log_event containing alter table. For some reason this is injected into IO_CACHE on master when binlog is turned on. Seems that other DDLs do not cause the same kind of behaviour. In any case, the assertion is not correct as the type of handled event is not checked.

Actions to take:

Fix assertion and implement deeper inspection of log events. Find out why Query_log_event is injected in IO_CACHE on master and change the behaviour if possible.