3 Replies Latest reply on Sep 30, 2015 11:49 PM by jaysensharma

Unable to instantiate driver class "org.olap4j.driver.xmla.XmlaOlap4jDriver"

claudinei Sep 30, 2015 8:01 AM

After adding Jasper Reports dependencies in Maven i 'm getting this WARN on Wildfly 9.01 initialization:

WARN  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-8) WFLYJCA0003: Unable to instantiate driver class "org.olap4j.driver.xmla.XmlaOlap4jDriver": java.lang.NoSuchMethodException: org.olap4j.driver.xmla.XmlaOlap4jDriver.<init>()

In pom.xml i have this for JR:

<dependency>
  <groupId>net.sf.jasperreports</groupId>
  <artifactId>jasperreports</artifactId>
  <version>6.1.0</version>
</dependency>
<dependency>
  <groupId>com.lowagie</groupId>
  <artifactId>itext</artifactId>
  <version>2.1.7</version>
</dependency>

How I can resolve this?

1. Re: Unable to instantiate driver class "org.olap4j.driver.xmla.XmlaOlap4jDriver"

jaysensharma Sep 30, 2015 4:43 AM (in response to claudinei)

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 [1]) which is usually Required for Class.forName().newInstance()

In Later version of olap Driver they have fixed this issue. Please see the fix [1]. So try the latest version of your JDBC Driver where they have a public empty constructor so it can be instantiated correctly by JDBC

[1] Fixes an issue with the XmlaOlap4jDriver and the DriverManager from J… · olap4j/olap4j@0627ad7 · GitHub
Actions
2. Re: Unable to instantiate driver class "org.olap4j.driver.xmla.XmlaOlap4jDriver"

claudinei Sep 30, 2015 8:01 AM (in response to jaysensharma)
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?
Actions
3. Re: Unable to instantiate driver class "org.olap4j.driver.xmla.XmlaOlap4jDriver"

jaysensharma Sep 30, 2015 11:49 PM (in response to claudinei)

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 [1].

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 [2] to avoid the WARNING message which you are getting.

[1] GC: Olap4jXmlaQueryExecuter - net.sf.jasperreports.olap.xmla.Olap4jXmlaQueryExecuter (.java) - GrepCode Class Source
[2] https://github.com/olap4j/olap4j/commit/0627ad7ffb2694b0074c7baca9b73a0b5eef6465
Actions

Go to original post