Diameter Signaling Router (DSR) - Console Connection - Error: Operation Failed: Active Console Session Exists For This Domain

Asset ID:	1-71-2157653.1
Update Date:	2016-07-05
Keywords:

Solution Type Technical Instruction Sure

Solution 2157653.1 : Diameter Signaling Router (DSR) - Console Connection - Error: Operation Failed: Active Console Session Exists For This Domain

Applies to:

Oracle Communications Diameter Signaling Router (DSR) - Version DSR 3.0 and later
Tekelec

Goal

Get a console connection to an guest from TVOE.

Solution

Login to TVOE
Execute the below command to identify the guests on the TVOE

[admusr@tvoe ~]$ sudo virsh list
Id Name State
----------------------------------------------------
1 soam-b running
2 noam-b running
[admusr@tvoe ~]$

If it is required to console login to first guest soam-b then do the following

[admusr@tvoe ~]$ sudo virsh console 1
Connected to domain kong-soam-b
Escape character is ^]

[admusr@soam-b]$

Now you are connected to console of soam-b.
In case you get the error "Active console session exists for this domain" while trying the console connection

[admusr@tvoe ~]$ sudo virsh console 1
Connected to domain soam-b
Escape character is ^]
error: operation failed: Active console session exists for this domain

[admusr@tvoe ~]

Then do the following:
Identify who is connected to the server using who command

[admusr@tvoe ~]$ sudo who
root ttyS0 2016-06-08 12:18
admusr pts/7 2016-07-05 02:48 (10.178.91.28)
[admusr@tvoe ~]$

As seen above there is a root login since long time, this should be disconnected in order to clear the console.
Verify the PID for this connection and then kill it

[admusr@tvoe ~]# ps -ef | grep ttyS0
root 6502 5343 0 Jun08 ttyS0 00:00:00 -bash
root 6531 6502 0 Jun08 ttyS0 00:03:57 virsh console 1
root 58082 57740 0 02:58 pts/7 00:00:00 grep ttyS0
[admusr@tvoe ~]# exit

[admusr@tvoe ~]# pkill 6502 6531 5343

[admusr@tvoe ~]# ps -ef | grep ttyS0
root 58835 1 0 03:11 ttyS0 00:00:00 /sbin/agetty /dev/ttyS0 115200 vt100
root 58842 58551 0 03:11 pts/7 00:00:00 grep ttyS0
[admusr@tvoe ~]#

Re-attempt the console connection

[admusr@tvoe ~]# virsh console 1
Connected to domain soam-b
Escape character is ^]

[admusr@soam-b]$

It is very important that the console connection is gracefully closed using key combinations CTRL + ] else the above error may appear again.

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