[xwiki-users] User management features are not accessible anymore after an upgrade (Xwiki on Websphere)

Dear All, I have a quick question concerning the upgrade procedure for Xwiki on a Solaris 5.10 SPARC/Oracle 10.2.0.3/Websphere technology stack. We have cloned our standing Xwiki production environment (v1.7.14685) and exported the Oracle database dump to a test machine for evaluating newer versions of Xwiki (of the 2.* respectively 3.* series). hibernate.cfg.xml, web.xml xwiki.cfg have been patched according to our requirements (security, authentication method, hibernate etc). At last, we have deployed the new Xwiki artifact (as an ear archive) to Websphere. At the moment, we are facing two major issues with the upgraded Xwiki installation on our test server. (1) For Xwiki <= 2.2.6 the resulting archive can be deployed to Websphere and the application can in fact be accessed and used. The main drawback is that the user management features are not accessible anymore, i.e. we cannot create new groups or assign users to Xwiki user groups anymore. Current group members aren't displayed anymore. The members list is only displayed a blank text field. When I try to display the list of group members in MS IE, the following JavaScript error is displayed: Line: 366 Char: 8 Error: 'ASSTable' is undefined Code: 0 ... This problem seems to be a variant of the one described on http://www.pubbs.net/200905/xwiki/106358-xwiki-users-no-users-and-groups .html. I tried to patch usersandgroups.js (both from stable releases and the svn trunk) and also purged the browser cache but this didn't resolve our problem. I'd greatly appreciate if someone among the Xwiki users or developers here was able to shed some light on this problem. (2) When I try to deploy the current Xwiki version 3.0 (or even anything "Component manager has not been initialized before lookup" Judging from similar earlier error reports, this issue might be related to Xwiki on Websphere. (And no, XWikiServletContextListener is already contained in the web.xml configuration file.) For specific details please refer to my previous error report on http://www.mail-archive.com/users@xwiki.org/msg15230.html Thanks in advance for your help regarding these two issues. Visit our website at http://www.ubs.com This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mails are not encrypted and cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments. UBS reserves the right to retain all messages. Messages are protected and accessed only in legally justified cases.