Hi,

First of all, you forgot to mention what version of XWiki you are using.

Goh Chong Leng, Jenson wrote:
> We have managed to setup xwiki to work in our UNIX environment.
> 
> However, we faced a lot of problems with xwiki during runtime.
> 
> (1)    Running xwiki in tomcat - The java process of tomcat can never be
> shutdown properly without using
> 'hard' killing, i.e. kill -HUP <process id>. I have searched the web and
> found that the cause is actually
> quartz library holding on to a process and thus preventing the tomcat
> jvm from shutting down.  
> See here http://jira.opensymphony.com/browse/QUARTZ-204 .  The problem
> is upgrading quartz to 1.6
> doesn't resolve the problem and attempting to update the two properties
> as recommended into
> the quartz.properties file will cause tomcat startup failure.  This is
> quite frustrating, so any input on how
> to resolve this problem is much appreciated.  Of course, the main
> motivation for this is to ensure 
> proper startup and shutdown so that this process can be automated.  If
> we have to manually execute
> 'kill', the automation of this tomcat process will be problematic.

This should be fixed in 1.5, see 
http://jira.xwiki.org/jira/browse/XWIKI-2454

> (2)    Everytime after a fresh restart of tomcat, when I hit the first
> page of my installed xwiki, I almost always
> get a connection reset error.  But the second hit will be ok.  I wonder
> why?  Any answers to this?

I think it is safe to ignore this error.

> (3)    The WYSIWYG support is a nightmare.  Everytime after an edit
> (even a mere clicking on the WYSIWYG link without edit
> will cause similar problems), all the formatting that used to work
> suddenly don't and user have to manually reformat it.  How to make
> WYSIWYG rendering consistent?

We know that the current WYSIWYG editor is buggy, unstable and 
confusing. Starting with 1.6 we'll have a new editor. Until then, 
there's nothing we can do, as maintaining or fixing the current one has 
proved to be almost impossible.

> (4)    Customization of user registration field - we spend hours trying
> to figure out how to customize the
> fields which we would like to have in our registration page.  Only
> managed to get the attributes added
> into the XWiki.XWikiUsers object.  But how to link this to stats/user
> profile edit page?  Any ideas? Also
> it seem like after an attribute is added to the XWikiUsers object, it
> can't be removed.  Any ideas on
> how to remove it?  Documentation on customization of user registration
> page is just a one liner which
> is totally useless to anyone who want to customize it.  It should be
> improved.

You cannot remove class properties yet. This is a known bug, and it will 
be fixed. A workaround is to revert to a previous version (from the 
history view of the XWikiUsers document) and continue from there.

To change the registration page, you must edit 
<xwikidir>/templates/registerinline.vm

To change the user profile page, you must edit XWiki/XWikiUserSheet

> (5)    When using Oracle as backend, search functions cannot work.
> Exception like this occurred when user
> perform search:
> 
> 
> 
> Exception while searching documents with sql from VisitStats as obj
> where obj.cookie=? and obj.endDate > ? order by obj.endDate desc
> 
> Wrapped Exception: could not execute query
> 
> Any way to get this search function working?
> 

This one is also fixed in 1.5, see
http://jira.xwiki.org/jira/browse/XWIKI-2472

> 
> (6)    Every now and then, log file will throws exceptions like this:
> java.sql.SQLException: ORA-00932: inconsistent datatypes: expected - got
> CLOB
> 
> Any idea what is the cause of it and how to resolve it?


I thought this was also fixed, seems I was wrong. See 
http://jira.xwiki.org/jira/browse/XASTATS-12

The support for Oracle is not so good, since none of the core developers 
is using it. We rely on user feedback and patches to maintain XWiki on 
Oracle.

> 
> 
> All in all, xwiki presents a great opportunity that meets many
> organization knowledge management needs (esp. in my organization).  But
> until all these problems are being resolved, I am amazed by the large
> number of user web sites that used xwiki in a production environment.
> 
> In my limited experience with xwiki thus far (closed to 3 months of
> working on it), the support requirements of xwiki would be such 
> a big problems that it will make anyone think twice to adopt it as
> enterprise knowledge management system.  I certainly is reconsidering
> other wiki consequently of all these problems.  
> 
>  
> 
> My company uses mediawiki as well.  While don't have the nice
> authentications and authorizations features like xwiki (which we like to
> have), 
> it is extremely stable and easy to use. 
> 


-- 
Sergiu Dumitriu
http://purl.org/net/sergiu/
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