This bug is already reported [1] and fixed in oslo.privsep 1.14.0, however we published 1.13.0 in newton and the socket keeps breaking down with official Newton release, we need backport this bug into stable/newton release and bump release version (please check the original bug for more logs):
```
2016-11-17 17:48:10.457 9744 WARNING oslo.service.loopingcall [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
Function 'cinder.service.Service.report_state' run outlasted interval by 130.60 sec
2016-11-17 17:48:10.461 9744 DEBUG cinder.backup.chunkeddriver [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
backup 449236af-56f2-4c9d-abc2-9a9cf29dd7bd finished. _finalize_backup /usr/lib/python2.7/dist-packages/cinder/backup/chunkeddriver.py:386
2016-11-17 17:48:10.485 9744 DEBUG oslo_concurrency.processutils [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
Running cmd (subprocess): sudo cinder-rootwrap /etc/cinder/rootwrap.conf chown 0 /dev/disk/by-path/ip-111.111.101.38:3260-iscsi-iqn.2006-08.com.huawei:oceanstor:21003400a30d844d::20000:111.111.101.38-lun-3 execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:344
2016-11-17 17:48:11.066 9744 INFO oslo.messaging._drivers.impl_rabbit [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
[d2925c37-5172-4fcf-9279-8ecc0ba1bc3b] Reconnected to AMQP server on controller:5672 via [amqp] clientwith port 43606.
2016-11-17 17:48:13.800 9744 DEBUG oslo_concurrency.processutils [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
CMD "sudo cinder-rootwrap /etc/cinder/rootwrap.conf chown 0 /dev/disk/by-path/ip-111.111.101.38:3260-iscsi-iqn.2006-08.com.huawei:oceanstor:21003400a30d844d::20000:111.111.101.38-lun-3" returned: 0 in 3.315s execute /usr/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:374
2016-11-17 17:48:13.802 9744 DEBUG os_brick.initiator.connectors.iscsi [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
==> disconnect_volume: call {'args': (<os_brick.initiator.connectors.iscsi.ISCSIConnector object at 0x7f7378df33d0>, {'target_discovered': False, 'target_iqn': u'iqn.2006-08.com.huawei:oceanstor:21003400a30d844d::20000:111.111.101.38', 'target_portal': u'111.111.101.38:3260', 'volume_id': '1c6a86bd-8728-4d8c-896d-8867f6b35973', 'target_lun': 3, 'map_info': {'lun_id': u'63', 'view_id': u'9', 'aval_luns': u'[0,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511]'}}, {'path': u'/dev/disk/by-path/ip-111.111.101.38:3260-iscsi-iqn.2006-08.com.huawei:oceanstor:21003400a30d844d::20000:111.111.101.38-lun-3', 'scsi_wwn': '363400a31000d844d021b7c720000003f', 'type': 'block'}), 'kwargs': {}} trace_logging_wrapper /usr/lib/python2.7/dist-packages/os_brick/utils.py:141
2016-11-17 17:48:13.806 9744 DEBUG oslo_concurrency.lockutils [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
Lock "connect_volume" acquired by "os_brick.initiator.connectors.iscsi.disconnect_volume" :: waited 0.000s inner /usr/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:273
2016-11-17 17:48:13.808 9744 DEBUG os_brick.initiator.linuxscsi [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
Flushing IO for device /dev/sdd flush_device_io /usr/lib/python2.7/dist-packages/os_brick/initiator/linuxscsi.py:148
2016-11-17 17:48:55.202 9744 INFO oslo.messaging._drivers.impl_rabbit [req-ab26d5c1-6028-4d62-a910-534b19c97a83 cee7ffcdb7744ace82be607171c7f5e7 15711de32e454b1b8924ddd9aa0d56af - default default]
A recoverable connection/channel error occurred, trying to reconnect: Socket closed
[1] https://bugs.launchpad.net/oslo.privsep/+bug/1623286
```
This issue was fixed in the openstack/