[openstack-dev] [all] Zuul job backlog

Matt Riedemann mriedemos at gmail.com
Fri Sep 28 21:01:34 UTC 2018

On 9/28/2018 3:12 PM, Clark Boylan wrote:
> I was asked to write a followup to this as the long Zuul queues have persisted through this week. Largely because the situation from last week hasn't changed much. We were down the upgraded cloud region while we worked around a network configuration bug, then once that was addressed we ran into neutron port assignment and deletion issues. We think these are both fixed and we are running in this region again as of today.
> Other good news is our classification rate is up significantly. We can use that information to go through the top identified gate bugs:
> Network Connectivity issues to test nodes [2]. This is the current top of the list, but I think its impact is relatively small. What is happening here is jobs fail to connect to their test nodes early in the pre-run playbook and then fail. Zuul will rerun these jobs for us because they failed in the pre-run step. Prior to zuulv3 we had nodepool run a ready script before marking test nodes as ready, this script would've caught and filtered out these broken network nodes early. We now notice them late during the pre-run of a job.
> Pip fails to find distribution for package [3]. Earlier in the week we had the in region mirror fail in two different regions for unrelated errors. These mirrors were fixed and the only other hits for this bug come from Ara which tried to install the 'black' package on python3.5 but this package requires python>=3.6.
> yum, no more mirrors to try [4]. At first glance this appears to be an infrastructure issue because the mirror isn't serving content to yum. On further investigation it turned out to be a DNS resolution issue caused by the installation of designate in the tripleo jobs. Tripleo is aware of this issue and working to correct it.
> Stackviz failing on py3 [5]. This is a real bug in stackviz caused by subunit data being binary not utf8 encoded strings. I've written a fix for this problem athttps://review.openstack.org/606184, but in doing so found that this was a known issue back in March and there was already a proposed fix,https://review.openstack.org/#/c/555388/3. It would be helpful if the QA team could care for this project and get a fix in. Otherwise, we should consider disabling stackviz on our tempest jobs (though the output from stackviz is often useful).
> There are other bugs being tracked by e-r. Some are bugs in the openstack software and I'm sure some are also bugs in the infrastructure. I have not yet had the time to work through the others though. It would be helpful if project teams could prioritize the debugging and fixing of these issues though.
> [2]http://status.openstack.org/elastic-recheck/gate.html#1793370
> [3]http://status.openstack.org/elastic-recheck/gate.html#1449136
> [4]http://status.openstack.org/elastic-recheck/gate.html#1708704
> [5]http://status.openstack.org/elastic-recheck/gate.html#1758054

Thanks for the update Clark.

Another thing this week is the logstash indexing is behind by at least 
half a day. That's because workers were hitting OOM errors due to giant 
screen log files that aren't formatted properly so that we only index 
INFO+ level logs, and were instead trying to index the entire file, 
which some of which are 33MB *compressed*. So indexing of those 
identified problematic screen logs has been disabled:


I've reported bugs against each related project.




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