INTERNAL ERROR: An internal exception has occured. (com.mysql.jdbc.CommunicationsException ; SQL Error Code=0)

Location: Newuser.checkExpired()
com.mysql.jdbc.CommunicationsException: Communications link failure

The last packet successfully received from the server was 16,793,573 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago.
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1034)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3434)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3334)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3774)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2541)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1604)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1535)
at org.genboree.dbaccess.Newuser.checkExpired(Newuser.java:45)