innodb文件损坏处理

innodb文件损坏报错如下：

2018-09-03T09:52:43.486363Z 0 [ERROR] InnoDB: Space id and page no stored in the page, read in are [page id: space=0, page number=50345472], should be [page id: space=0, page number=408]
2018-09-03T09:52:43.486498Z 0 [ERROR] InnoDB: Database page corruption on disk or a failed file read of page [page id: space=0, page number=408]. You may have to recover from a backup.
2018-09-03T09:52:43.486544Z 0 [Note] InnoDB: Page dump in ascii and hex (16384 bytes):
 len 16384; hex 0d00000003003600013700c6003600000000000000000000000000000000000000000000000000000000000000000000000000000000810a81bcff2606027b04811b4c8d4172697374657520526f7a616e736b69203c61726f7a616e736b407265646861742e636f6d3e205b322e362e33322d3134372e656c365d4dc928c02d205b6275696c645d2064697361626c65205765727220666f722065787465726e616c206d6f64756c657320284172697374657520526f7a616e736b6929205b3730333530345d880f81bcff2506027b048f254c8d4172697374657520526f7a616e736b69203c61726f7a616e736b407265646861742e636f6d3e205b322e362e33322d3134382e656c365d4dcbcbc02d205b6e65745d20646363703a2068616e646c6520696e76616c69642066656174757265001df982854381bcff2406027b048a0d4c8d4172697374657520526f7a616e736b69203c61726f7a616e736b407265646861742e636f6d3e205b322e362e33322d3134392e656c365d4dcd1d402d205b7838365d204d43453a2044726f70207468652064656661756c74206465636f64696e67206e6f746966696572202850726172697420426861726761766129205b3638383238315d0a2d205b7838365d204d43453a20446f206e6f74207461696e74207768656e2068616e646c696e6720636f727265637461626c65206572726f7273202850726172697420426861726761766129205b3638383238315d0a2d205b6b65726e656c5d207072696e746b3a2075736520704b20666f72202f70726f632f6b616c6c73796d7320616e64202f70726f632f6d6f64756c657320285068696c6c692018-09-03T09:52:43.492211Z 0 [Note] Semi-sync replication initialized for transactions.
2018-09-03T09:52:43.504398Z 0 [Note] Semi-sync replication enabled on the master.
70204c6f756768657229205b3637393236325d0a2d205b6b65726e656c5d2074696d65722064656275673a2048696465206b65726e656c206164647265737365732076696120704b20696e202f70726f632f74696d65725f6c69737420285068696c6c6970204c6f756768657229205b3637393236325d0a2d205b64726d5d20646f206e6f74206c65616b206b65726e656c2061646472657373657320766961202f70726f632f6472692f2a2f2018-09-03T09:52:43.504481Z 0 [Note] Starting ack receiver thread
766d6120285068696c6c6970204c6f756768657229205b3637393236325d0a2d205b6b65726e656c5d206b7074725f726573747269637420666f7220686964696e67206b65726e656c20706f696e746572732066726f6d20756e70726976696c6567656420757365727320285068696c6c6970204c6f756768657229205b3637393236325d0a2d205b6e65745d20666978206e65746e732076732070726f746f20726567697374726174696f6e206f2018-09-03T09:52:43.504874Z 0 [Note] Recovering after a crash using mysql-bin
2018-09-03T09:52:43.510443Z 0 [Note] Starting crash recovery...
72646572696e67202857616465204d65616c696e6729205b3730323330365d207b4356452d323031312d31373637204356452d323031312d313736387d00000000206f7074696f6e73206c656e67746820284a697269205069726b6f29205b3730333031335d207b4356452d2018-09-03T09:52:43.510528Z 0 [Note] Crash recovery finished.

　　使用innodb_force_recovery参数来恢复，innodb_force_recovery参数有6个选项具体如下

1 (SRV_FORCE_IGNORE_CORRUPT)
 
Lets the server run even if it detects a corrupt page. Tries to make SELECT * FROM tbl_name jump over corrupt index records and pages, which helps in dumping tables.
 
2 (SRV_FORCE_NO_BACKGROUND)
 
Prevents the master thread and any purge threads from running. If a crash would occur during the purge operation, this recovery value prevents it.
 
3 (SRV_FORCE_NO_TRX_UNDO)
 
Does not run transaction rollbacks after crash recovery.
 
4 (SRV_FORCE_NO_IBUF_MERGE)
 
Prevents insert buffer merge operations. If they would cause a crash, does not do them. Does not calculate table statistics.
This value can permanently corrupt data files. After using this value, be prepared to drop and recreate all secondary indexes. Sets InnoDB to read-only.
 
5 (SRV_FORCE_NO_UNDO_LOG_SCAN)
 
Does not look at undo logs when starting the database: InnoDB treats even incomplete transactions as committed.
This value can permanently corrupt data files. Sets InnoDB to read-only.
 
6 (SRV_FORCE_NO_LOG_REDO)
 
Does not do the redo log roll-forward in connection with recovery. This value can permanently corrupt data files.
Leaves database pages in an obsolete state, which in turn may introduce more corruption into B-trees and other database structures. Sets InnoDB to read-only.

　　尽量用最小的参数尝试启动，大的包含小的

innodb_force_recovery=1

　　修改参数以后启动成功，mysqlcheck工具检查看具体哪个表的文件损坏。

[root@redis03 data]# mysqlcheck -A -u root -p
Enter password:
ht.tb                                              OK
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.engine_cost                                  OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.gtid_executed                                OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.innodb_index_stats                           OK
mysql.innodb_table_stats                           OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.server_cost                                  OK
mysql.servers                                      OK
mysql.slave_master_info                            OK
mysql.slave_relay_log_info                         OK
mysql.slave_worker_info                            OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
sys.sys_config                                     OK

　　如果有损坏可以先备份出来删除原表在导入进去

mysqldump  --databases ht --set-gtid-purged=OFF >ht.sql
mysql -u root -p < ht.sql