Problems while using Tango Access Control

General Development
1

Hi,

I am exploring tango access control and was facing few problems. It would be great if you could help me out.

The steps I follow while exploring are :

  • Start mysql and tango.
  • Start tango access control and starter device server.
  • launch astor and jive to monitor devices.

Now, with mysql and tango running,I am summarizing my problems into 3 scenarios:

Scenario #1 : SUPER_TANGO = true

  • could run all servers and tools

Scenario #2 : SUPER_TANGO = true

  • Starter and Tango access control servers started.
  • made SUPER_TANGO = false
  • started jive and astor : both open into read only mode.
  • started access control (after giving the default password) : opens in read only mode, could see myself in ‘unsorted user’ branch.
  • could run other device servers too.

Scenario #3 : SUPER_TANGO = false

  • As soon as I try to run any of my device server (Starter/TangoAccessControl), it gives me the following error:

Tango exception
Severity = ERROR
Error reason = API_DatabaseAccess
Desc : Database error while trying to retrieve properties for class DServer
Origin : DeviceClass::get_class_system_resource

Received a CORBA_Exception
Exiting

  • could not open jive and astor as well.

I did follow the query string on http://www.tango-controls.org/community/forums/c/general/development/tango-access-control/ and updated my class properties. However, I did not understand the ‘host resolution’ part. I have declared my host and address in /etc/hosts as well as in basrc as TANGO_HOST.

  1. Is the behaviour depicted in the scenarios normal?
  2. Is there any solution for scenario #3 ?
  3. How and where should I configure TAC with username and password?

Thanks and regards,
Snehal