Error: "(AutoUnlock) source chain ..."

Products

• IT Management Suite

Issue/Introduction

Noticed the following warning message right after having issues with NSE queue processing:

(AutoUnlock) source chain: timeout=72, [1: 0, N, lock=105020800 (195.74 KB), src=d93439b9-eb6a-4c6a-8510-e4260bbf6437, rounds=1.10 k, age=00:23:24, cid=14]
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Date: 10/18/2022 7:05:17 PM, Tick Count: 1421875 (00:23:41.8750000), Size: 398 B
Process: AeXSvc (6080), Thread ID: 152, Module: Altiris.NS.dll
Priority: 2, Source: EventQueueDispatcher.OrderedQueueEntry

Environment

ITMS 8.x

Resolution

These warning messages are a sign that NSE processing is quite slow to process messages in the referenced queue (estimated to be over 60 seconds for one NSE). Then, the "chain of messages for this client machine" is unlocked to allow parallel processing of other NSEs from the same client, which are smaller and could be processed faster.

So, in general, if you see issues with slow NSE processing or a large amount of NSEs in the queue, it is expected to see this warning. 

To see a (potential) reason for such slowness, you'll need to collect and review more information as explained below:

1. Full NS logs with verbose/trace ON and some Profiler session for ~5 minutes, so we can see the whole picture.
2. Specs for the NS/SQL are good to know,
3. The number of clients served by the Notification Server.

 

Additional Information

How to troubleshoot NSE processing issues