[xwiki-users] Problems with Lucene lock (IOException) ...

Hello, I had some system problems with the server hosting my wiki, now solved, but now the Lucene plugin seems to be in an unstable state. When first accessing xwiki I get a : java.io.IOException: Lock obtain timed out: Lock(a)/opt/tomcat/temp/lucene-dcdf99faa0a5827d2037245ccf529558-write.lock I tried to stop tomcat, remove the index completely from /usr/local/xwiki/lucene, deactivate the Lucene plugin from xwiki.cfg and restart, but it still fails the same way. I tried to reactivate the Lucene plugin, but still the same error, and the index is not re-created, leading to various "FileNotFoundException" to occur ... I'm running on linux, with mysql and xwiki 1.1. The .lock file is accessible read/write, as well as the index folder ... How can I correct my Lucene plugin state ? Thanks, Jérémie