Database Directory storage is full need to change link it to new Partition
Here is the key:

2018-08-21T10:08:04.839360Z 0 [ERROR] InnoDB: os_file_readdir_next_file() 
returned -1 in directory ./, crash recovery may have failed for some .ibd 
files!


It says, it can't traverse the directory containing the database files, with the error code -1. Error -1 means


  permission denied


The user on which your mysql server is running, should have access to the directory. On most Linuxes, the command is: chown mysql:mysql -Rc /var/lib/mysql as root.