Javax.mail. Servlet. ServletException: servlet execution threw an exception
Org, apache tomcat, websocket server. WsFilter. DoFilter (WsFilter. Java: 52)
Root Cause

Java. Lang. AbstractMethodError: Method of com/mysql/JDBC ResultSet isClosed (Z) is the abstract
Com. Mysql. JDBC ResultSet. IsClosed (ResultSet. Java)
Org. Apache. Ibatis. Executor. The resultset. DefaultResultSetHandler. HandleRowValuesForSimpleResultMap (DefaultResultSetHandler. Java: 352)
Org. Apache. Ibatis. Executor. The resultset. DefaultResultSetHandler. HandleRowValues (DefaultResultSetHandler. Java: 328)
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