revision-id: 7107adad09074f342ee8f97715ad3a618deac8fe (mariadb-10.1.33-28-g7107adad090) parent(s): c1698e8dc50f0c342c1a6886426ba1d43396cd1e author: Jan Lindström committer: Jan Lindström timestamp: 2018-06-06 14:19:14 +0300 message: MDEV-16401: Apply review comments to MDEV-16005 Do not hold LOCK_thd_data during my_error or WSREP_DEBUG. Similarly, release LOCK_thd_data before close_thread_tables() call. --- sql/sql_parse.cc | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index be7408af77d..292eb1f9831 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -1271,9 +1271,9 @@ bool dispatch_command(enum enum_server_command command, THD *thd, if (thd->wsrep_conflict_state == ABORTED && command != COM_STMT_CLOSE && command != COM_QUIT) { + mysql_mutex_unlock(&thd->LOCK_thd_data); my_error(ER_LOCK_DEADLOCK, MYF(0), "wsrep aborted transaction"); WSREP_DEBUG("Deadlock error for: %s", thd->query()); - mysql_mutex_unlock(&thd->LOCK_thd_data); thd->reset_killed(); thd->mysys_var->abort = 0; thd->wsrep_conflict_state = NO_CONFLICT; @@ -7290,34 +7290,44 @@ static void wsrep_mysql_parse(THD *thd, char *rawbuf, uint length, thd->lex->sql_command != SQLCOM_SELECT && (thd->wsrep_retry_counter < thd->variables.wsrep_retry_autocommit)) { - WSREP_DEBUG("wsrep retrying AC query: %s", + mysql_mutex_unlock(&thd->LOCK_thd_data); + WSREP_DEBUG("wsrep retrying AC query: %s", (thd->query()) ? thd->query() : "void"); /* Performance Schema Interface instrumentation, end */ MYSQL_END_STATEMENT(thd->m_statement_psi, thd->get_stmt_da()); thd->m_statement_psi= NULL; thd->m_digest= NULL; + // Released thd->LOCK_thd_data above as below could end up + // close_thread_tables()/close_open_tables()/close_thread_table()/mysql_mutex_lock(&thd->LOCK_thd_data) close_thread_tables(thd); + mysql_mutex_lock(&thd->LOCK_thd_data); thd->wsrep_conflict_state= RETRY_AUTOCOMMIT; thd->wsrep_retry_counter++; // grow wsrep_copy_query(thd); thd->set_time(); parser_state->reset(rawbuf, length); + mysql_mutex_unlock(&thd->LOCK_thd_data); } else { - WSREP_DEBUG("%s, thd: %lu is_AC: %d, retry: %lu - %lu SQL: %s", - (thd->wsrep_conflict_state == ABORTED) ? + mysql_mutex_unlock(&thd->LOCK_thd_data); + // This does dirty read to wsrep variables but it is only a debug code + WSREP_DEBUG("%s, thd: %lu is_AC: %d, retry: %lu - %lu SQL: %s", + (thd->wsrep_conflict_state == ABORTED) ? "BF Aborted" : "cert failure", - thd->thread_id, is_autocommit, thd->wsrep_retry_counter, + thd->thread_id, is_autocommit, thd->wsrep_retry_counter, thd->variables.wsrep_retry_autocommit, thd->query()); my_error(ER_LOCK_DEADLOCK, MYF(0), "wsrep aborted transaction"); + + mysql_mutex_lock(&thd->LOCK_thd_data); thd->wsrep_conflict_state= NO_CONFLICT; if (thd->wsrep_conflict_state != REPLAYING) thd->wsrep_retry_counter= 0; // reset + mysql_mutex_unlock(&thd->LOCK_thd_data); } - mysql_mutex_unlock(&thd->LOCK_thd_data); + thd->reset_killed(); } else @@ -7353,6 +7363,7 @@ static void wsrep_mysql_parse(THD *thd, char *rawbuf, uint length, #endif /* WITH_WSREP */ } + /* When you modify mysql_parse(), you may need to modify mysql_test_parse_for_slave() in this same file.