**play.api.Configuration$$anon$1: Configuration error[Cannot connect to
database [default]]
Caused by: play.api.Configuration$$anon$1: Configuration error[Failed to
initialize pool: Unknown system variable 'tx_isolation']
Caused by:
com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Failed to
initialize pool: Unknown system variable 'tx_isolation'
java.sql.SQLException: Unknown system variable 'tx_isolation'**

mysql> show variables like 'tx_isolation';
Empty set (0.00 sec)