Thanks, you are right I forgot to removed solr subdirectory before upgrade.
stop + rm + start xwiki = xwiki work again like a charm
(sorry ;-) )
Thxs
--- En date de : Mar 4.10.16, Vincent Massol <vincent(a)massol.net> a écrit :
  De: Vincent Massol <vincent(a)massol.net>
 Objet: Re: [xwiki-users] Issues when I upgraded my xwiki 7.0.1 to xwiki        8.2.1:
search feature
 À: "XWiki Users" <users(a)xwiki.org>
 Date: Mardi 4 octobre 2016, 11h36
 Hi,
 Try removing your solr index.
 Thanks
 -Vincent
  
 On 04 Oct 2016, at 11:26, Pascal BASTIEN
<pbasnews-xwiki(a)yahoo.fr>
 wrote:
 Hello,
 After upgrading my 
 xwiki 7.0.1 to 8.2.1, i encoutered another issue: xwiki
 search feature doesn't work anymore.
  I use Tomcat 8.0.33 + Postrgesqk 9.3 and 
attachments in file system and connected with Admin
 account.
 On page 
./bin/view/Main/Search?text=test&f_type=DOCUMENT&f_locale=fr&f_locale=&r=1
 , I have this ugly error message displayed:
  "Failed to execute the [velocity] 
macro. Cause: [The resolver parameter doesn't contain an
 Entity Reference of type [SPACE]]. Click on this message for
 details."
 >