Fix InnoDB error: The InnoDB memory heap is disabled

160826 14:07:30 mysqld_safe Number of processes running now: 0
160826 14:07:30 mysqld_safe mysqld restarted
160826 14:07:30 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
160826 14:07:30 [Note] /usr/sbin/mysqld (mysqld 5.5.50) starting as process 24167 ...
160826 14:07:30 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.
160826 14:07:30 [Note] Plugin 'FEDERATED' is disabled.
160826 14:07:30 InnoDB: The InnoDB memory heap is disabled
160826 14:07:30 InnoDB: Mutexes and rw_locks use GCC atomic builtins
160826 14:07:30 InnoDB: Compressed tables use zlib 1.2.8
160826 14:07:30 InnoDB: Using Linux native AIO
160826 14:07:30 InnoDB: Initializing buffer pool, size = 128.0M
InnoDB: mmap(137363456 bytes) failed; errno 12
160826 14:07:30 InnoDB: Completed initialization of buffer pool
160826 14:07:30 InnoDB: Fatal error: cannot allocate memory for the buffer pool
160826 14:07:30 [ERROR] Plugin 'InnoDB' init function returned error.
160826 14:07:30 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
160826 14:07:30 [ERROR] Unknown/unsupported storage engine: InnoDB
160826 14:07:30 [ERROR] Aborting

160826 14:07:30 [Note] /usr/sbin/mysqld: Shutdown complete

160826 14:07:30 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
160826 14:07:47 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

If you have something like this, add this entry innodb_use_sys_malloc = 0 into the my.cnf and restarted the MySQL.