MySQL 事务没有提交导致 锁等待 Lock wait timeout exceeded

Lock wait timeout exceeded

当一个SQL执行完了，但未COMMIT，后面的SQL想要执行就是被锁，超时结束；

select * from information_schema.innodb_trx 之后找到了一个一直没有提交的只读事务，

kill 到了对应的线程后ok 了。

mysql> select * from information_schema.innodb_trx;

+--------+-----------+---------------------+-----------------------+------------------+------------+---------------------+-----------+---------------------+-------------------+-------------------+------------------+-----------------------+-----------------+-------------------+-------------------------+---------------------+-------------------+------------------------+----------------------------+---------------------------+---------------------------+
| trx_id | trx_state | trx_started         | trx_requested_lock_id | trx_wait_started | trx_weight | trx_mysql_thread_id | trx_query | trx_operation_state | trx_tables_in_use | trx_tables_locked | trx_lock_structs | trx_lock_memory_bytes | trx_rows_locked | trx_rows_modified | trx_concurrency_tickets | trx_isolation_level | trx_unique_checks | trx_foreign_key_checks | trx_last_foreign_key_error | trx_adaptive_hash_latched | trx_adaptive_hash_timeout |
+--------+-----------+---------------------+-----------------------+------------------+------------+---------------------+-----------+---------------------+-------------------+-------------------+------------------+-----------------------+-----------------+-------------------+-------------------------+---------------------+-------------------+------------------------+----------------------------+---------------------------+---------------------------+
| F663B  | RUNNING   | 2016-11-09 10:15:52 | NULL                  | NULL             |         10 |               14310 | NULL      | NULL                |                 0 |                 0 |                7 |                  1248 |               4 |                 3 |                       0 | REPEATABLE READ     |                 1 |                      1 | NULL                       |                         0 |                      9999 |
+--------+-----------+---------------------+-----------------------+------------------+------------+---------------------+-----------+---------------------+-------------------+-------------------+------------------+-----------------------+-----------------+-------------------+-------------------------+---------------------+-------------------+------------------------+----------------------------+---------------------------+---------------------------+
1 row in set


mysql> kill 14310 ;
Query OK, 0 rows affected


mysql>