[Koha] zebra index problem

[regina kivuyo]

i am using ubuntu 12.04 with koha 3.20

root at saut-HP-Pro-3400-Series-MT:/home/koha-3.20.13# sudo -u koha
misc/migration_tools/rebuild_zebra.pl -b -r -
Zebra configuration information
================================
Zebra biblio directory      = /var/lib/koha/zebradb/biblios
Zebra authorities directory = /var/lib/koha/zebradb/authorities
Koha directory              = /usr/share/koha/intranet/cgi-bin
Lockfile                    = /var/lock/koha/zebradb/rebuild/rebuild..LCK
BIBLIONUMBER in :     999$c
BIBLIOITEMNUMBER in : 999$d
================================
skipping authorities
====================
exporting biblio
====================

Records exported: 0
====================
REINDEXING zebra
====================
====================
CLEANING
====================

i think the problem Lockfile   = /var/lock/koha/zebradb/rebuild/rebuild..LCK

how to solve the problem


root at saut-HP-Pro-3400-Series-MT:/var/lock/koha/zebradb/rebuild# ls -laR
.:
total 4
drwxr-xr-x 2 koha koha  80 Aug 10 12:01 .
drwxr-xr-x 5 koha koha 100 Aug 10 11:00 ..
-rw-r--r-- 1 koha koha  23 Aug  5 15:13 README
-rw-r--r-- 1 koha koha   0 Aug 10 13:12 rebuild..LCK

root at saut-HP-Pro-3400-Series-MT:/home/koha-3.20.13# sudo service
koha-index-daemon start
 * Starting Koha indexing daemon (koha)                                  [
OK ]

root at saut-HP-Pro-3400-Series-MT:/home/koha-3.20.13# sudo
/usr/share/koha/bin/koha-zebra-ctl.sh start
Starting Zebra Server


please help where is the problem


please help

-- 
regina