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Category Archives: event id

Solving Event ID 31117 – LS Response Group Service

15 Friday Apr 2016

Posted by Paul Bloem in event id, Uncategorized

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Tags

Call is disconnected because of invalid configuration, Event ID 31117, Response Group, RGS, Skype for Business, Troubleshooting, workflow encountered a critical error

The Problem

Users calling in to a existing Response Group Service are getting calls dropped when the call steps through the workflow and is directed to the RGS Queue. All other Workflows are working fine.

History

This started after an admin was tasked with re-directing calls to the workflow DDI\DID in question to another workflow temporarily. It was when they switched the calls back that the issue revealed itself.

The Evidence

Checking the Event Log on one of the Front Ends I find an error alluding to a workflow issue. Event ID 31117 states that “the workflow encountered a critical error”.

Event ID 31117

Monitoring Database shows a Diagnostic ID 26029 with a description “Call is disconnected because of invalid configuration”

Diagnostic ID 26029

So by now I was thinking that there is some sort of configuration issue with the workflow or inherently the queue, or group. I checked and double check, everything looks fine on the surface.

Finding the culprit

With no further information to go by I took a stab at the possibility that an invalid agent SIP address was added to the group (seen a similar issue where that was the cause, see here). Nope, all good.

With only three variables, the Workflow, the Queue and the Group, I decided a quick process of elimination should flush out the hog.

Turning to the Workflow, I changed the destination Queue to one that I knew was working. Tested it and, well that worked. So the Workflow is fine.

Next up the Queue, I removed the associated Groups from the queue and added groups I knew were working. OK so that worked, calls went to the test group members. So now I knew it was the Queue that was causing the pain.

Keeping it simple, I just deleted the Queue, invoked replication and re-added it. A quick test call and voila..Sorted!

Response Groups can be really powerful, they can also be a royal pain in the behind when something goes wrong.

TIP

Making changes to RGS takes a few minutes to set, I usually invoke replication before testing any changes.

 

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Solving Event ID 32134

24 Thursday Dec 2015

Posted by Paul Bloem in event id, RTC Database, RTCAB, SQL, Uncategorized

≈ 1 Comment

Tags

Event ID 32134

Whilst working through a patching session I noticed a standard edition front end server throwing Event ID 32134 every 10 minutes.

That’s new to me, so how do we resolve this?

Error Details

Event ID 32134

Event ID 32134
Source: LS User Services
Error

Failed to connect to back-end database. Lync Server will continuously attempt to reconnect to the back-end. While this condition persists, incoming messages will receive error responses.

Back-end Database: rtcab Connection string of:

driver={SQL Server Native Client 11.0};Trusted_Connection=yes;AutoTranslate=no;server=(local)\rtc;database=rtcab;

Cause: Possible issues with back-end database.

Resolution:
Ensure the back-end is functioning correctly.

 Cause

The error message does give a good clue as to where to start looking. The server cant connect to the backend database rtcab on the local server.

My weapon of choice is SQL Management Studio as it will allow me to take a peek at the suspect database.

Connecting to the local server and expanding the databases folder I notice the rtcab database stating that access is set to Restricted User).

SQL Restricted User

Solution

Not sure why this rtcab access has been locked, perhaps part of the update process that didn’t quite finish.

An easy fix, simply right click the database rtcab and select Properties. Navigate to Options.

Scroll down to the State section and change the Restrict Access to MULTI_USER.

Lync Backend Database

Even on a good day, error messages from SQL make me uncomfortable, BUT this particular issue has been comfortably sorted.

 

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Frequent invalid SIP requests

05 Monday Aug 2013

Posted by Paul Bloem in Edge Server, event id, Event ID 14603, Frequent invalid SIP requests

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Problem
Partners receiving a large number of errors in the Edge Server event log like below



Solution
The cause seems to be Lync still sending discovery packets every 10 minutes.
If federation is allowed, add the SIP domain to the allowed list, if blocked – add the SIP domain to the blocked list.
This will be followed by a final event entry stating that the problem has been resolved

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