THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Edit the 'guest' user and grant it the repository observer role for that repo. There is also a global repository observer role you can grant, if you want all of your repositories to be visible without logging in.
How do I configure archiva to listen on ipv4 under java 6?
Edit the wrapper.conf to add a "Java Additional Parameter" such as
wrapper.java.additional.4=-Djava.net.preferIPv4Stack=true