To clarify, I've done attendedsysupgrade in Luci about every two weeks for the last few years, and this is the first time I've seen this error.
My position in queue for building the image was 0 so I doubt congestion was a concern.
I am ascribing this to an incompatibility in collectd or luci-app-statistics that must be fixed, or else whatever broke it in SNAPSHOT itself needs to be fixed.
It pays off to look at the actual build failure logs of the buildbot to see it there is something. https://downloads.openwrt.org/snapshots/faillogs/
Currently several dozen packages are failing for a reason or other.
Nothing to do with server congestion.
try with the latest snapshot, and see if that changes anything. I just refreshed package list and it looks like a lot of luci-app-**** aren't being found.
This is likely due to the version upgrade of postgresql to 16.3 three days ago by @dangowrt.
Postgresql fails to build in buildbot, and that then breaks a few dozen other packages including collectd (and thus LuCI statistics).
You may be right about congestion on the firmware-selector.openwrt.org mirror at times, but as @hnyman notes, this issue lies with a recent commit by @dangowrt and not congestion.
The firmware-selector relies on pre-built buildbot images and that All Release Images will reflect Static builds based on the latest commit at the time.
You can see this in the GUI for any Release listed by the firmware-selector in the Revision Number and the Release Date. Since only SNAPSHOT builds are dynamic, they will be affected until the Postgresql version update gets resolved while you will be able to run 23.05.3 Release builds without issue.
Were these packages discontinued?
For the last 4 or so days, building an image for this target couldn't succeed because of the following packages - shown in the screenshot:
No,
Due to postgresql that fails since 4-5 days since the version upgrade to new major version 16.3
Nothing to do with dl-wrx36 specifically (that this thread is about).
Ps.
The problem only concerns those who do not build from sources, (and use imagebuilder or buildbot binaries based auc/owut/attendedsysupgrade). You can quite normally build from sources as long as you avoid the postgresql related packages (or submodules like collectd-mod-postgresql).