title: Mysql Unknown system variable 'tx_isolation'
body: <p>I have a project written in java <code>1.6</code> (used on tomcat <code>6</code>). Can't upgrade. I am using connector <code>5.1.7</code>. But I have mysql db <code>8</code>. </p>
  
  <p>I am getting following error:
  <code>java.sql.SQLException: Unknown system variable 'tx_isolation'</code></p>
  
  <p>That seems pretty logic as <a href="https://stackoverflow.com/questions/51016980/java-sql-sqlexception-unknown-system-variable-tx-isolation">Mysql8 has renamed <code>tx_isolation</code> to <code>transaction_isolation</code></a>. obviously using mysql connector <code>8</code> I am getting <code>com/mysql/jdbc/Driver : Unsupported major.minor version 52.0</code></p>
  
  <p>The question is, is there anything I can do without downgrading my database ?</p>
  
  <p><strong>EDITED:</strong>
  If I downloaded <code>MySQL server 5.5</code>, would it be possible to "link" db from currently installed <code>MySQL server 8</code> ? (to avoid redundant data replication) ?</p>