I have really encountered compatibility issues between mysql-server 5.6 and old mysql-connector version.
It seems my project only worked on the latest JDBC mysql-connector 5.1.24 when I updated mysql-server 5.5 to 5.6.
David told me "Latest versions of DBMSs, coupled with latest JDBC connectors should usually work, but we do not check that with every version." :(
But I found Tersus works well on both MariaDB 5.5 & 10.0 with its official version of MariaDB Client Library for Java Applications (JDBC connector). XD
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