msnetc edited a comment on issue #2106: sharding_proxy: Caused by: java.sql.SQLException: Unknown system variable 'query_cache_size' URL: https://github.com/apache/incubator-shardingsphere/issues/2106#issuecomment-476942066 > what is version of your jdbc driver? upgrade your jdbc driver and try it again I have updated my jdbc drvier to mysql-connector-java-8.0.15 on the host of sharding_proxy， mysql server is on the other server。 but it still hava the error of Caused by: java.sql.SQLException: Unknown system variable 'query_cache_size'。 warning: mysql-connector-java-8.0.15-1.el7.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY package mysql-connector-java-8.0.15-1.el7.noarch is already installed
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