Ok I think I had a too much aggressive custom logging system (a page frequently saved) and my xwiki encoutered this bug. http://jira.xwiki.org/browse/XWIKI-13336?focusedCommentId=91972&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-91972
I think it is ok now (except I still wonder << I wonder, Is there a timeout associated to the script that runs and is there feedback in the event of an error (or a way to activate logs for job scheduled)?>> Thxs Pascal BASTIEN
