mysql does not start

171125 18:53:02 InnoDB: Mutexes and rw_locks use GCC atomic builtins
171125 18:53:02 InnoDB: Compressed tables use zlib 1.2.3
171125 18:53:02 InnoDB: Using Linux native AIO
171125 18:53:02 InnoDB: Initializing buffer pool, size = 128.0M
171125 18:53:02 InnoDB: Completed initialization of buffer pool
InnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes
InnoDB: than specified in the .cnf file 0 5242880 bytes!
171125 18:53:02 [ERROR] Plugin 'InnoDB' init function retued error.
171125 18:53:02 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
171125 18:53:02 [ERROR] Unknown/unsupported storage engine: InnoDB
171125 18:53:02 [ERROR] Aborting

171125 18:53:02 [Note] /usr/sbin/mysqld: Shutdown complete

171125 18:53:08 [Note] Plugin 'FEDERATED' is disabled.
171125 18:53:08 InnoDB: The InnoDB memory heap is disabled
171125 18:53:08 InnoDB: Mutexes and rw_locks use GCC atomic builtins
171125 18:53:08 InnoDB: Compressed tables use zlib 1.2.3
171125 18:53:08 InnoDB: Using Linux native AIO
171125 18:53:08 InnoDB: Initializing buffer pool, size = 128.0M
171125 18:53:08 InnoDB: Completed initialization of buffer pool
InnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes
InnoDB: than specified in the .cnf file 0 5242880 bytes!
171125 18:53:08 [ERROR] Plugin 'InnoDB' init function retued error.
171125 18:53:08 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
171125 18:53:08 [ERROR] Unknown/unsupported storage engine: InnoDB
171125 18:53:08 [ERROR] Aborting

171125 18:53:08 [Note] /usr/sbin/mysqld: Shutdown complete

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