liujiyuan opened a new issue, #21276: URL: https://github.com/apache/shardingsphere/issues/21276
## Bug Report **For English only**, other languages will not accept. Before report a bug, make sure you have: - Searched open and closed [GitHub issues](https://github.com/apache/shardingsphere/issues). - Read documentation: [ShardingSphere Doc](https://shardingsphere.apache.org/document/current/en/overview). Please pay attention on issues you submitted, because we maybe need more details. If no response anymore and we cannot reproduce it on current information, we will **close it**. Please answer these questions before submitting your issue. Thanks! ### Which version of ShardingSphere did you use? apache/shardingsphere-proxy docker 5.2 mysql8 ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy? apache/shardingsphere-proxy docker 5.2 ### Expected behavior connect successfully ### Actual behavior Return Unknown system variable 'query_cache_size' when connect server ### Reason analyze (If you can) I feel shardingsphere-proxy use mysql5.7 driver default. Whether config mysql driver version by myself or not? ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc. connect shardingsphere-proxy server by mysql client ### Example codes for reproduce this issue (such as a github link). `03:05:48.803 [Connection-2-ThreadExecutor] ERROR org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask - Exception occur: java.sql.SQLException: Unknown system variable 'query_cache_size' at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2530) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2491) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2449) at com.mysql.jdbc.StatementImpl.executeInternal(StatementImpl.java:845) at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:939) at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:103) at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) at org.apache.shardingsphere.proxy.backend.communication.jdbc.executor.callback.impl.ProxyStatementExecutorCallback.execute(ProxyStatementExecutorCallback.java:41) at org.apache.shardingsphere.proxy.backend.communication.jdbc.executor.callback.ProxyJDBCExecutorCallback.executeSQL(ProxyJDBCExecutorCallback.java:74) at org.apache.shardingsphere.proxy.backend.communication.jdbc.executor.callback.ProxyJDBCExecutorCallback.executeSQL(ProxyJDBCExecutorCallback.java:67) at org.apache.shardingsphere.proxy.backend.communication.jdbc.executor.callback.ProxyJDBCExecutorCallback.executeSQL(ProxyJDBCExecutorCallback.java:44) at org.apache.shardingsphere.infra.executor.sql.execute.engine.driver.jdbc.JDBCExecutorCallback.execute(JDBCExecutorCallback.java:95) at org.apache.shardingsphere.infra.executor.sql.execute.engine.driver.jdbc.JDBCExecutorCallback.execute(JDBCExecutorCallback.java:75) at org.apache.shardingsphere.infra.executor.kernel.ExecutorEngine.syncExecute(ExecutorEngine.java:135) at org.apache.shardingsphere.infra.executor.kernel.ExecutorEngine.parallelExecute(ExecutorEngine.java:131) at org.apache.shardingsphere.infra.executor.kernel.ExecutorEngine.execute(ExecutorEngine.java:116) at org.apache.shardingsphere.infra.executor.sql.execute.engine.driver.jdbc.JDBCExecutor.execute(JDBCExecutor.java:65) ` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
