Error "list index out of range" when running wibed-node script

[zavalyshyn]

For some unknown reason (yet) after resetting the node we may end up having ResultAck value but no CommandAck in /etc/config/wibed.

This causes confusion on server side when running wibed-node script. Here is an example of wibed-node output:

root@wibed-faaf86:~# wibed-node
---------------------------------------
Thu Sep  3 15:06:09 UTC 2015
---------------------------------------
API URL: http://wibed.ac.upc.edu/
Id: wibed-faaf86
Status: 1
Model: tl-wdr4300

Version: 7dbba9de
Experiment Id: 0000
Command Ack: None
Result Ack: 5
Flash is the overlay

Request:
{
 "status":1
}

Communication with server successful

{
 "errors": [
   "list index out of range"
 ], 
 "experiment": {
   "action": "PREPARE", 
   "id": 7, 
   "overlay": "ap_test7.tar.gz"
 }
}
Error sent by server:
1   list index out of range
root@wibed-faaf86:~# 

[emmdim]

This may be a result of the wibed-reset script when a node is reinitializing. Maybe a uci commit command in missing after this line:
https://github.com/battlemesh/wibed-packages/blob/master/wibed-system/files/usr/sbin/wibed-reset#L44
as also in other parts of the script.

The inconsistency is possibly created when the db of the controller is deleted.

[emmdim]

From the server side this issue is traced in this DB request:
https://redmine.confine-project.eu/projects/wibed-controller/repository/revisions/master/entry/blueprints/nodeapi/nodeapi.py#L194
where there are no expCommands.