The following 'ovirt-master_change-queue-tester' run failed with a Java exception:
http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/2257/

The exception seen in blue ocean is the following:

In the job console one can see a different exception:

The exception in the console seem to indicate that the exception is in line 300 of the pipeline script in the mk_ost_runner funtction. Here is the code of the function for reference:

It looks like the exception seen in the console is a secondary exception that happens because of the failure to stash some files earlier in the code inside the basic-suit run branch as indicated in the blue ocean display. Looking further at the log, we can fined the following which aligns with what we see in blue ocean (Lines that belong to other run branches had been removed):

From the log above it seems that the actual failure is around line 294 if the function quoted above.