Per bug 1181233 comment 8 - QA currently doesn't have means to implement own STOMP client for stress testing the VDSM server side while reliably verifying its results.
Piotr, can you please run your unit tests against 3.5.1 VDSM if you reproduce it?
And if this issue doesn't appear any more, I would move this bug to Verified. At least I don't see any better way around how to verify this.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2015-0904.html