mysql 8.0 java串連報錯：Unknown system variable 'query_cache_size'

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 java串連mysql 8.0.11報錯

java.sql.SQLException: Unknown system variable ‘query_cache_size‘
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:115)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:1983)
at com.mysql.cj.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:1936)
at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1422)
at com.mysql.cj.jdbc.ConnectionImpl.loadServerVariables(ConnectionImpl.java:2831)
at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:2381)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1739)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1596)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)

 

原因是mysql-connector-java的版本還是6.0.6，需要升級版本到8.0.11 ，這個報錯就不存在了

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.11</version>
</dependency>

 

mysql 8.0 java串連報錯：Unknown system variable 'query_cache_size'