title: confluence install cause 500 exception HibernateException
body: <p>I currently use confluence and mysql to make personal wiki. However I have in <code>500 exception HibernateException</code>.</p>
  
  <p>The log of confluence:</p>
  
  <p><blockquote>
  Caused by: com.atlassian.confluence.tenant.VacantException: Confluence is vacant, a call to tenanted [public abstract net.sf.hibernate.Session net.sf.hibernate.SessionFactory.openSession() throws net.sf.hibernate.HibernateException] is not allowed.
          at com.atlassian.confluence.tenant.TenantGate$1.lambda$create$306(TenantGate.java:45)
          at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)</p>
  
  <p></blockquote></p>
  
  <p>What I have done:</p>
  
  <ol>
  <li>confirm that the mysql connecter work correct. Details are in <a href="https://confluence.atlassian.com/conf56/troubleshooting-external-database-connections-658737195.html" rel="nofollow">Test mysql connerctor</a>.</li>
  <li>Reinstall serveral times, but the error appears too.</li>
  <li>Google the problem and find it, but no anwse. See <a href="https://answers.atlassian.com/questions/22649509/confluence-fails-at-first-access-attempt-after-installation." rel="nofollow">openSession() throws net.sf.hibernate.HibernateException </a></li>
  </ol>
  
  <p>Any helps are welcome！</p>