Article ID: 129345, created on Aug 29, 2016, last review on Aug 29, 2016

  • Applies to:
  • Operations Automation 6.0
  • Operations Automation 5.5


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In /var/log/poa-ui.log on UI server, the following error can be found:

2016-08-29 21:05:45,907            xec-3 DEBUG  CORBA                #518: Plesk._hubStub.acquire_own_cred(undefined) >>> entry
2016-08-29 21:05:45,967            xec-3 DEBUG  CORBA                #518: Plesk._hubStub.acquire_own_cred(undefined) <<< exit [60] by exception:
2016-08-29 21:05:45,968            xec-3 DEBUG  ERR                  org.omg.CORBA.NO_PERMISSION: Server Exception: Unknown vendor (0x9c40000)  Minor Code: 9  vmcid: 0x9c40000  minor code: 9  completed: No
2016-08-29 21:05:45,968            xec-3 DEBUG  ERR                     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
2016-08-29 21:05:45,968            xec-3 DEBUG  ERR                     at sun.reflect.NativeConstructorAccessorImpl.newInstance(

UI server is configured with one IP address as the backnet, but uses frontnet address to connect to OA MN:

[root@ui ~]# ip r g via dev eth0  src
    cache  mtu 1500 advmss 1460 hoplimit 64

[root@ui ~]# grep /usr/local/pem/etc/pleskd.props


OA compares the IP address of arriving UI request with the communication IP set for the node through OA Agent settings and forbids such access in case the IPs do not match. The behavior will be changed in scope of POA-86786 request.


Add the correct rule on UI server to communication with OA MN over the same network as the communication IP address assigned to OA Agent on UI server.

# ip route add via dev eth1 src

To make the change permanent, save it as /etc/sysconfig/network-scripts/route-eth1 file: via dev eth1 src

Note: eth1 interface is shown as an example, the real-life interface name may be different.

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