java.sql.SQLException: Unknown system variable 'tx_isolation'

Question

I am using play framework and I want to connect db, but I can't because I am getting following error:

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

I tried to find tx_isolation, but it doesn't exist:

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

So what is and how can I find tx_isolation?

---

Sorry. this is my error code. and I use mysql 8.0.11. so i find 'transaction_isolation'

play.db {
  config = "db"
  default = "default"
}
db {
//TODO : 작업필요
  default.driver = com.mysql.jdbc.Driver
  default.url = "jdbc:mysql://127.0.0.1:3306/testPlayDB"
  default.username = root
  default.password = "321A@654"
}

Error cause Default.url = "jdbc:mysql://127.0.0.1:3306/testPlayDB"

i use Scala, playframework and StackOverflow first time...

Thank you.

Answer 1

If you are using MYSQL8, try to show variables like 'transaction_isolation'. Mysql8 has renamed tx_isolation to transaction_isolation.