Warning while Running report: Found two components for namespace

Question

I have problem with report using JasperReports. I ran report on my program, it works, but there were error message just like this

net.sf.jasperrepo         


        

Answer 1

It means that you have several jar files in your JasperReports Library classpath... just use:

• commons-beanutils-1.8.0
• commons-collections-2.1.1
• commons-digester-1.7
• commons-javaflow-20060411
• commons-logging-1.0.4
• groovy-all-1.7.5
• iText-2.1.7
• jasperreports-4.5.0 (any version)
• png-encoder-1.5
• poi-3.7-20101029 (Or poi-3.6)

and problem solved...

Answer 2

Just delete jasperreports-javaflow*.jar from your classpath during report compilation.
The error should disappear.

Answer 3

I updated primefaces jar file from 3.5 to 4.0. It is solved the problem.

Answer 4

For the latest downloadable jasper jar zip(Japsperreports-6.3.0.jar) it does not provide all the needed jar files.You have to find the jar files. For eliminate issues just add

jasperreports-6.3.0.jar , org.apache.commons.collections.jar , commons-logging-1.2.jar , commons-digester-2.1.jar , commons-beanutils-1.8.3.jar ,

will work fine..

Answer 5

The jasperreports-maven-plugin repeats the jasperreports dependency. I had your problem when I changed the version of my jasperreports dependency but did not also change it in the dependency of the jasperreports-maven-plugin.