Frequently Asked Questions

  1. Is there an easy way to aggregate dashboard reports from various projects?
  2. Why do I get the error "java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable."?
  3. Why do I get the error "Invalid class loader hierarchy. You have more than one version of 'xxxxxx' visible, which is not allowed."?
  4. Why do I lose the table's colors when i want to print dashboard's reports?
Is there an easy way to aggregate dashboard reports from various projects?

Unfortunately Maven's internal support for report aggregation is rather poor and does have a number of limitations.

This may be addressed by an application like Sonar to monitor quality statistics from various projects.

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Why do I get the error "java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable."?

This happens on Unix/Linux machine without installed X11 window server. See Unix Environment documentation.

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Why do I get the error "Invalid class loader hierarchy. You have more than one version of 'xxxxxx' visible, which is not allowed."?

Due to Changes that may affect existing builds in Maven 2.0.9 (MNG-1412 / MNG-3111 introduced deterministic ordering of dependencies on the classpath.), you can have a "java.lang.ExceptionInInitializerError".

This error can be raised if you used "commons-logging" in the last version which is incompatible with the version used by Hibernate in dashboard plugin.

To resolve it, you must use the ability for Maven 2.0.9 to override a dependency used by a plugin.

For example, with "commons-logging" version conflict, use this configuration : 


<!-- Dashboard -->
<plugin>
	<groupId>org.codehaus.mojo</groupId>
	<artifactId>dashboard-maven-plugin</artifactId>
	<version>1.0-SNAPSHOT</version>
	<configuration>
		<dialect>${org.hibernate.dialect}</dialect>
		<driverClass>
			${org.hibernate.connection.driverclass}
		</driverClass>
		<connectionUrl>
			${org.hibernate.connection.connectionurl}
		</connectionUrl>
		<username>${org.hibernate.connection.username}</username>
		<password>${org.hibernate.connection.password}</password>
		<keepVersionAsDiscriminantCriteria>
			false
		</keepVersionAsDiscriminantCriteria>

	</configuration>
	<dependencies>
		<dependency>
			<!-- HSQLDB Jdbc Driver -->
			<groupId>hsqldb</groupId>
			<artifactId>hsqldb</artifactId>
			<version>1.8.0.9</version>
		</dependency>

		<!-- to override commons-logging in Hibernate library dependency -->
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.1</version>
		</dependency>
	</dependencies>
</plugin>

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Why do I lose the table's colors when i want to print dashboard's reports?

This is a setting of the browser, not a CSS issue.

In MSIE, it is part of the Advanced Options of the Internet Settings:

IE print configuration

In Firefox, it is an option in the File - Page Setup dialogue:

IE print configuration

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