场景:在操作数据库的过程中,由于一些原因,如:事务未正常提交/回滚等造成数据库死锁,导致其他需要事务的操作出现锁等待超时的错误,Lock wait timeout exceeded; try restarting transaction。
查询数据库死锁的线程id:
SELECT * FROM information_schema.INNODB_TRX/G查询结果如下:
MySQL> SELECT * FROM information_schema.INNODB_TRX/G************************** 1. row **************************trx_id: 189324trx_state: RUNNINGtrx_started: 2017-02-17 10:00:00trx_requested_lock_id: NULLtrx_wait_started: NULLtrx_weight: 3trx_mysql_thread_id: 5trx_query: NULLtrx_Operation_state: NULLtrx_tables_in_use: 0trx_tables_locked: 0trx_lock_structs: 2trx_lock_memory_bytes: 376trx_rows_locked: 3trx_rows_modified: 1trx_concurrency_tickets: 0trx_isolation_level: REPEATABLE READtrx_unique_checks: 1trx_foreign_key_checks: 1trx_last_foreign_key_error: NULLtrx_adaptive_hash_latched: 0trx_adaptive_hash_timeout: 10000trx_is_read_only: 0trx_autocommit_non_locking: 01 row in set (0.01 sec)杀掉死锁线程:
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疑难解答