shibboleth-identityprovider-2.3.5-slo10 build error

[袁立舟]

HI,everyone

I'm researching the SLO subject of Shibboleth IdP. So I download the source code provided by NIIF  Institute. Its version is 2.3.5. But I encounter the following problem when I build the project with Maven command [mvn install] in the directory containing pom.xml . This command is all right with version 2.2.1

Reason: Parse error reading POM. Reason: Duplicated tag: 'version' (position: ST
ART_TAG seen ...<ersion>\n        <version>... @11:18)  for project unknown at C:\Documents and Settings\cghp\sitya-java-idp-4d0e041\pom.xml

I can not figure out this problem then I download missing packages as it shown below by hand:
shibboleth-common-1.3.5.jar
common-httpclient-contrib.jar
opensaml-2.5.3.jar
spring-2.0.5.jar
servlet-api.jar
...
...

But I am still notified:

The method getIndexFromNameID(NameID) is undefined for the type SessionManager<Session>
The method getBackChannelConnectionPoolTimeout() is undefined for the type  LogoutRequestConfiguration

Both SessionManager and LogoutRequestConfiguration are in the package of edu.internet2.middleware.shibboleth.common. What I have downloaded is the version shibboleth-common-1.3.5.There are no such two methods as mentioned in the notification in the source code. I don't know the cause for the problem, is that I got a wrong version of a jar package or that there's something wrong with my method to do the building?

Thank you very much for any effort to help me out of the puzzle.