Cannot load JDBC Driver class in Birt 4.6.0-20160607 - oracle

Question

i am having a Java EE project in which i include the Birt runtime as a maven dependency:
<dependency>
<groupId>org.eclipse.birt.runtime</groupId>
<artifactId>org.eclipse.birt.runtime</artifactId>
<version>4.6.0-20160607</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.birt.runtime</groupId>
<artifactId>org.apache.xerces</artifactId>
</exclusion>
<exclusion>
<artifactId>org.apache.poi</artifactId>
<groupId>org.eclipse.birt.runtime</groupId>
</exclusion>
</exclusions>
</dependency>
The engine seems to be created (i hope at least) . In my report i have defined the datasource settings.
<data-sources>
<oda-data-source extensionID="org.eclipse.birt.report.data.oda.jdbc" name="somename" id="43">
<list-property name="privateDriverProperties">
<ex-property>
<name>contentBidiFormatStr</name>
<value>ILYNN</value>
</ex-property>
<ex-property>
<name>metadataBidiFormatStr</name>
<value>ILYNN</value>
</ex-property>
</list-property>
<property name="odaDriverClass">oracle.jdbc.driver.OracleDriver</property>
<property name="odaURL">jdbc:oracle:thin:#host...</property>
<property name="odaUser">username</property>
<encrypted-property name="odaPassword" encryptionID="base64">password</encrypted-property>
</oda-data-source>
</data-sources>
Unfortunately it seems that Birt cannot find the ojdbc driver (Note, we use an oracle database) and we get the following error:
SEVERE [org.eclipse.birt.data.engine.odaconsumer] (default task-20)
Unable to open connection.:
org.eclipse.birt.report.data.oda.jdbc.JDBCException: Cannot load JDBC
Driver class: oracle.jdbc.driver.OracleDriver.
I have included in my Web module under WEB-INF/lib the following jar org.eclipse.birt.report.data.oda.jdbc_4.6.0.v201606072122.jar but i am still getting the same error.
Is there any way to solve this by adding the ojdbc as a maven dependency or is there any other workaround ?
Update: I have tried to also to add the also the org.eclipse.birt.report.data.oda.jdbc_4.6.0.v201606072122.jar as a maven dependency.
<!-- Oracle JDBC driver -->
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.4.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.birt</groupId>
<artifactId>ojdbc</artifactId>
<scope>system</scope>
<version>1.0</version>
<systemPath>${basedir}\src\main\resources\lib\org.eclipse.birt.report.data.oda.jdbc_4.6.0.v201606072122.jar</systemPath>
</dependency>
I am getting the same error. Bellow some part of the stacktrace:
2017-01-05 13:07:11,990 SEVERE
[org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager] (default
task-45) DriverClassLoader failed to load class:
oracle.jdbc.driver.OracleDriver: java.lang.ClassNotFoundException:
oracle.jdbc.driver.OracleDriver
at org.eclipse.birt.core.framework.URLClassLoader.findClass1(URLClassLoader.java:188)
......
......
2017-01-05 13:07:12,020 SEVERE
[org.eclipse.birt.data.engine.odaconsumer] (default task-45) Unable to
open connection.: org.eclipse.birt.report.data.oda.jdbc.JDBCException:
Cannot load JDBC Driver class: oracle.jdbc.driver.OracleDriver.
at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.findDriver(JDBCDriverManager.java:881)
Update 2: I made further changes but still without success. I added the org.eclipse.birt.report.data.oda.jdbc_4.6.0.v201606072122.jar library in all my modules under WEB-INF and MEtA-INF
\src\main\webapp\WEB-INF\lib\org.eclipse.birt.report.data.oda.jdbc_4.6.0.v201606072122.jar
The results are quite the same:
2017-01-05 15:40:49,927 SEVERE
[org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager] (default
task-19) DriverClassLoader failed to load class:
org.eclipse.birt.report.data.oda.jdbc:
java.lang.ClassNotFoundException:
org.eclipse.birt.report.data.oda.jdbc
I would also like to note here something. For our persistence in the application, we use a datasource on our wildfly in which we use the ojdbc driver as a module in Wildfly 10 .
I am slowly running out of ideas with Birt + ojdbc

Answer 1

Finally solved the problem. I had to install the oda jdbc driver in my local manen repository and add it as a dependency in my ejb module.
<dependency>
<groupId>org.eclipse.birt.ojdbc</groupId>
<artifactId>odajdbc</artifactId>
<version>4.6.0-201606072122</version>
</dependency>
Furthermore, for some reason which i cannot yet explain, Birt required also the ojdbc6 driver in my web module. I honestly cannot understand why, since the entire birt implementation and runtime is in the ejb module.
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.4.0</version>
</dependency>
That solved the problem and now the reports are getting generated.
I am now facing two new problems which i have to solve.
1) java.lang.OutOfMemoryError: Java heap space : I found in Eclipse bugzilla that this problem can be solved with the ojdbc7 driver. The reports are not generated unless i push my servers -Xmx above 1400mb
2) [org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager] (default task-20) DriverClassLoader failed to load class: oracle.jdbc.driver.OracleDriver: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver: For some reason i get this error only one time when i want to generate a report. The report is generated without problems and the exception never appears again.
At least the reports are working now and can continue solving the other issues.