Comment 11 for bug 1604311

I have faced with the same issue on MOS QA CI - generating dignostic Snapshot hangs

MOS 9.x, snapshot #157, fuel-qa stable/mitaka
details: http://pastebin.com/Mx3b1bNs

[root@nailgun ~]# fuel --debug task
GET http://10.109.2.2:8000/api/v1/transactions/
id | status | name | cluster | progress | uuid
---+---------+-------------------------+---------+----------+-------------------------------------
8 | ready | provision | 1 | 100 | fa1ec149-4916-4ab7-bcab-cdf69a769d1f
5 | ready | deploy | 1 | 100 | bd2e0e9d-1ab0-4f36-96c5-524c71dcb49f
9 | ready | deployment | 1 | 100 | f3eef5d0-382e-4ebf-914e-54d4a4fbd30c
11 | ready | check_dhcp | 1 | 100 | aec5e6c4-17d3-482f-bee3-5ae51367813c
12 | ready | check_repo_availability | 1 | 100 | 93ddebf1-06e1-4956-9345-e3fbb3e08714
10 | ready | verify_networks | 1 | 100 | dc33a0ff-0055-447e-b694-b6dc1e652a6c
13 | running | dump | | 0 | 60f6a70e-5fb0-48fb-a886-c28d6588130d
[root@nailgun ~]#

[root@nailgun ~]# fuel --debug snapshot
PUT http://10.109.2.2:8000/api/v1/logs/package data={}
400 Client Error: Bad Request for url: http://10.109.2.2:8000/api/v1/logs/package (A task is already running)

/var/log/mcollective-audit.log
...
[2016-08-20 15:59:41 UTC] reqid=54202df6765658c2b4f084d5f90e9358: reqtime=1471708781 caller=uid=0@master agent=execute_shell_command action=execute data={:cmd=>"shotgun -c /tmp/dump_config > /dev/null 2>&1 && cat /var/www/nailgun/dump/last", :process_results=>true}

As I see the same issue on product CI:
https://product-ci.infra.mirantis.net/job/9.x.system_test.ubuntu.ha_neutron_destructive/33/console