Re: [xwiki-devs] Fwd: Get started with XWiki

Hi, On the palliative side (i.e. not actually fixing, but at least making life a bit easier), we might consider a naming scheme for the downloadable that includes that supported java version, e.g. xwiki-10.3-java8.zip (though this might also lead users to thinking that the java 8 runtime is included... which might not be that bad of an idea, if we think about it... at least for the zip version that is for demo purposes, which already contains the web server, the database, but still expects the user to understand and install the correct Java runtime, which makes no sense.) So, yeah... TL;DR: add the java8 runtime to the .zip package and make life easier for everyone. Optionally (though not sure if needed anymore, if we bundle it), include it in the .zip file name. Of course, the production install, if done manually (i.e. not through .deb/.rpm packages), expects that the user reads the documentation. Thanks, Eduard On Mon, May 14, 2018 at 10:19 AM, Vincent Massol &lt;vincent(a)massol.net&gt; wrote: > Hi devs, here’s a feedback we received, FYI. > > Ideas? > > Thanks > -Vincent > > > Begin forwarded message: > > > > From: Vincent Massol > > Subject: Re: Get started with XWiki > > Date: 14 May 2018 at 09:10:06 CEST > > To: XXX > > Cc: XXX > > > > Hi Christian, > > > >> On 12 May 2018, at 14:25, Christian XXX wrote: > >> > >> It's not working. > >> > >> And as usual ith java, the log does not help. Maybe if I were an > expert? But an app is supposed to be installed by just 'smart' users, not > experts. > > > > If you choose the easy installation methods we propose then it’s easy > and you have nothing to do. > > > > Which distribution did you choose and use? > > > >> And there is no help from the website. > >> > >> Oracle Linux 7. > >> Linux localhost.localdomain 4.1.12-124.14.5.el7uek.x86_64 #2 SMP Fri > May 4 15:26:53 PDT 2018 x86_64 x86_64 x86_64 GNU/Linux > >> Java 10 > >> Xwiki 10.3 > >> tomcat. > >> > >> If it is not compatible whith this java. It should not install. > > > > It’s just not been tested with Java 10 yet. It’s not even fully working > with Java 9. > > > > Note that it’s hard to check for the java version for all the > distributions since XWiki is a webapp and the XWiki WAR can just be dropped > in a servlet container and thus we don’t have a startup script and a place > where we can put a check. All we could do is have a Servlet Listener that > would emit a big stack trace (like the one you got) and that would say at > the innermost level that XWiki requires Java <= 8. But even that wouldn’t > be good since it would prevent testing in Java 9+. We want feedback from > users about what works/what doesn’t work so improve support for Java 9 and > 10. > > > >> If it is compatible with only one version of java, which one? > > > > You need to read the installation page ;) > > > > See http://www.xwiki.org/xwiki/bin/view/Documentation/ > AdminGuide/Installation/ and especially: > > http://www.xwiki.org/xwiki/bin/view/Documentation/ > AdminGuide/Installation/#HHardwareandSoftwarerequirements > > > >> Here is the error: > >> > >> > >> Error number 4001 in 4: Error while evaluating velocity template > colorThemeInit.vm > >> Error number 4001 in 4: Error while evaluating velocity template > colorThemeInit.vm > >> com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while > evaluating velocity template colorThemeInit.vm > > > > [snip] > > > >> Caused by: java.lang.IllegalStateException: No standard field found > for reverse order comparator! > >> at org.jboss.marshalling.river.Protocol.<clinit>(Protocol. > java:276) > >> ... 249 mor > > > > [snip > > > >> Caused by: java.lang.IllegalStateException: No standard field found > for reverse order comparator! > >> at org.jboss.marshalling.river.Protocol.<clinit>(Protocol. > java:276) > >> ... 249 mor > > > > What this says is that JBoss Infinispan (which we use) is not compatible > with Java 10. Apparently this is fixed in recent version of JBoss > Marshalling: https://issues.jboss.org/browse/JBMAR-216. We probably just > need to wait for JBoss Infinispan to release a new version that uses JBoss > Marshalling 2.1.0.Final. > > > > What would be awesome would be for you to report the problem of using > XWiki with Java 10 on https://jira.xwiki.org so that we can have an issue > for it and work to make it work. > > > > Note that I’m replying to this message to help you out but it’s not the > right place to post a question and get help normally. For that we have a > user forum at https://forum.xwiki.org/. > > > > I’m sorry you had some issues. OTOH you’re looking for trouble by trying > with Java 10. There are very few (if any!) java app that currently work > with Java 9 and 10. You’d be much better off using Java 8. On the positive > side, if you raise the issue on https://jira.xwiki.org, then you will > transform your negative experience into a positive one, by contributing to > the development of XWiki and helping out future users. > > > > Thanks > > -Vincent Massol > > [snip] > >