Above look like a WARNING.
The mentioned WARNING seems to be coming because your "org.olap4j.driver.xmla.XmlaOlap4jDriver" JDBC Driver is not providing a No Argument Constructor (see ) which is usually Required for Class.forName().newInstance()
In Later version of olap Driver they have fixed this issue. Please see the fix . So try the latest version of your JDBC Driver where they have a public empty constructor so it can be instantiated correctly by JDBC
The only JDBC driver i'm using is MySqlDriver and is the latest version already.
<driver name="mysql" module="com.mysql"> <driver-class>com.mysql.jdbc.Driver</driver-class> <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> </driver>
The Olap4jDriver is not in project or Wildfly, Jasper Reports is auto using it, and i can't find a way to include this driver in Wildfly.
Do you know what a can do?
Even if you think that you are not using OLAP directly, But the "jasperreports" which you are using in your project uses the "olap". See .
Although the message which you posted in your initial issue description is just a WARNING message which you can ignore. Or else contact your jasperreports team to provide you a new updated framework which includes the fixed version of "olap". The Olap driver should contain the fix  to avoid the WARNING message which you are getting.