Rock-Ons OwnCloud-Official - Error on Rock-Ons Update

Brief description of the problem

  • Rockstor 3.9.1-16 (recently updated from 3.9.0) with MariaDB and OwnCloud-Official installed
  • When hitting the “Update” button in the Rock-ons “Installed” page, the error below appears after some seconds

Detailed step by step instructions to reproduce the problem

Unfortunately I cannot just re-install the OwnCloud installation.
But I think to reproduce the error, install Owncloud-Official with MariaDB as backend on e.g. 3.9.0 (specific rock-ons version also?) and try to update the installed rock-ons.

Web-UI screenshot

Error Traceback provided on the Web-UI

        Traceback (most recent call last):

File “/opt/rockstor/src/rockstor/storageadmin/views/”, line 106, in post
self._create_update_meta(r, rockons[r])
File “/opt/rockstor/eggs/Django-1.8.16-py2.7.egg/django/utils/”, line 145, in inner
return func(*args, **kwargs)
File “/opt/rockstor/src/rockstor/storageadmin/views/”, line 267, in _create_update_meta
handle_exception(Exception(e_msg), self.request)
File “/opt/rockstor/src/rockstor/storageadmin/”, line 47, in handle_exception
RockStorAPIException: [‘Cannot add/remove volume definitions of the container(owncloud-official) as it belongs to an installed Rock-on(OwnCloud-Official). Uninstall it first and try again.’, ‘Traceback (most recent call last):\n File “/opt/rockstor/eggs/gunicorn-19.7.1-py2.7.egg/gunicorn/workers/”, line 68, in run_for_one\n self.accept(listener)\n File “/opt/rockstor/eggs/gunicorn-19.7.1-py2.7.egg/gunicorn/workers/”, line 27, in accept\n client, addr = listener.accept()\n File “/usr/lib64/python2.7/”, line 202, in accept\n sock, addr = self._sock.accept()\nerror: [Errno 11] Resource temporarily unavailable\n’]