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Problem :

I am getting bellow error while I try to connect MySql database with Java using connector 8.0.11

java.sql.sqlnontransientconnectionexception: public key retrieval is not allowed

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Solution:

I also faced above error , in my case it was actually due to the wrong username and password. 

Solving the issue: 

a. Go to the line DriverManager.getConnection("jdbc:mysql://localhost:3306/?useSSL=false", "username", "password"); 

b.The fields username and password must be wrong. You must enter the username and password which you use to start your mysql client. 

Further Readings:

https://github.com/speedment/speedment/issues/621

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