Cannot connect to MySQL

28 Mar '20, 07:45 PM
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I am unable to connect to my MySQL database.

I'm using the most recent vesions of WebRation Community Edition and MySQL (InnoDB).

Here are the connection parameters:

Type: MySQL (also tried MySQL (InnoDB))

URL: jdbc:mysql://localhost:3306/shieldie

User name: <user>

Password: <password>

shieldie is the name of the schema on the MySQL database. I do not know what the "database" name would be other than this. This is the default schema for the user.

I am connecting OK with MySQL Workbench with the same connection parameters.

Is there a problem with the authentication mechanism used on the database - I am using the recommended one, not the old one?

 

THIS IS DRIVING ME NUTS. I hope someone can help. Thanks in advance.

James

 

Here is the error message from Web

Ratio.

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
    at com.mysql.jdbc.Util.getInstance(Util.java:360)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:924)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:870)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2311)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at com.webratio.commons.db.metadata.MetaDataRetriever.runAnt(MetaDataRetriever.java:132)
    at com.webratio.commons.db.metadata.MetaDataRetriever.main(MetaDataRetriever.java:51)
Caused by: java.lang.NullPointerException
    at com.mysql.jdbc.ConnectionImpl.getServerCharset(ConnectionImpl.java:2983)
    at com.mysql.jdbc.MysqlIO.sendConnectionAttributes(MysqlIO.java:1873)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1802)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1206)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2234)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265)
    ... 14 more

 

 

 
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I found the problem.

It was down to the new authentication method used by MySQL.

All I had to do was download the latest driver (and rename it to match what WebRation was expcting).

Thank goodness for that!

 
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