Could not rebalance out node in non root installation

Install couchbase server 2.5.1 on 3 nodes use non root way (couchbase user)
Initialize node 195 on web UI and assign data path to /data (permission 777)
Delete default bucket on node 195
Install cb 2.5.1 on node 196 and 197 with non root method (couchbase user)
When UI on node 196 and 197 is up. At node 195, add node 196 and 197 to node 195.
Rebalance. OK
Remove node 197 and rebalance. Rebalance failed.
Error said

Rebalance exited with reason

{buckets_cleanup_failed,['ns_1@172.23.107.195']}

ns_orchestrator002 ns_1@172.23.107.196 18:47:58 - Thu Apr 9, 2015
Failed to cleanup old buckets on node 'ns_1@172.23.107.195':

{error,eacces} ns_rebalancer000 ns_1@172.23.107.196 18:47:58 - Thu Apr 9, 2015
Unable to delete some DBs for bucket default. Leaving bucket directory undeleted{error,eacces}

ns_storage_conf000 ns_1@172.23.107.195 18:47:58 - Thu Apr 9, 2015
Deleting old data files of bucket "default" ns_storage_conf000 ns_1@172.23.107.195 18:47:58 - Thu Apr 9, 2015